Typhoon Watch issued October 18 at 9:38AM ChST by NWS Tiyan GU

7 recorded details changed

Title

Before

Typhoon Watch issued October 17 at 3:06PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 17 at 9:19PM ChST by NWS Tiyan GU

Source updated

Before

17 October 2026 at 05:06 UTC

After

17 October 2026 at 11:19 UTC

Effective from

Before

17 October 2026 at 05:06 UTC

After

17 October 2026 at 11:19 UTC

Forecast onset

Before

17 October 2026 at 05:06 UTC

After

17 October 2026 at 11:19 UTC

Message expiry

Before

17 October 2026 at 13:15 UTC

After

17 October 2026 at 19:30 UTC

Official description

Before

...CHAMPI UPGRADED TO TYPHOON AND BARRELING TOWARD THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides information and recommended action for people on Guam, and people on Rota, Tinian and Saipan in the Commonwealth of the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continue for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 100 PM ChST, the center of Typhoon Champi (29W) was located near latitude 12.5N and longitude 148.0E. This was about 225 miles east- southeast of Guam. Storm motion was west-northwest, 290 degrees, at 18 mph. Storm intensity has increased to 100 mph, making it a Category 2 typhoon. This general forecast track will take Champi just south of Guam as a Category 3 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Showers and winds will continue to steadily increase the rest of today, to then deteriorate significantly tonight as newly upgraded Typhoon Champi continues to move in from the east-southeast. Champi is undergoing a period of rapid intensification, strengthening further as the day goes on. The most recent storm tracks continue to indicate Champi passing either south, or over, Guam Sunday morning, which may potentially bring devastating wind conditions to much of Guam during passage. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

After

...TYPHOON CHAMPI NOW A DANGEROUS CATEGORY 4 MOVING WEST TOWARDS GUAM COASTAL WATERS... .NEW INFORMATION... Guam is now in Condition of Readiness 1 as of 1 PM ChST. Rota is now in Typhoon Condition of Readiness 1 as of 5 PM ChST. Saipan and Tinian remain in Typhoon Condition of Readiness 3. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for Rota, Tinian and Saipan in the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. A Flash Flood Warning is now in effect for Guam. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Typhoon Champi (29W) was located near latitude 12.6N...longitude 146.7E. This was about 140 miles east-southeast of Guam. Storm motion was west, 280 degrees, at 15 mph. Storm intensity was 130 mph. This general forecast track will take Champi just south of Guam as a Category 4 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Typhoon Champi (29W) has been undergoing rapid intensification today. As a result it is now a dangerous category 4 typhoon. It is expected to pass a little south of Guam as a super typhoon within the next 12 hours. This may potentially bring devastating wind conditions to much of Guam during passage. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f3ac425658ce0c4107e5c8d6fda782a704256e61.003.2

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9a5870c872448e6423b4191a0b6d1863ee7a2d3a.003.2

Bulletin issued: 17 October 2026 at 11:19 UTC

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  "authorityId": "urn:oid:2.49.0.1.840.0.9a5870c872448e6423b4191a0b6d1863ee7a2d3a.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
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      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 17 at 9:19PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-17T11:19:00.000Z",
  "issuedAt": "2026-10-17T11:19:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-17T11:19:00.000Z",
  "onsetAt": "2026-10-17T11:19:00.000Z",
  "expiresAt": "2026-10-17T19:30:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TYPHOON CHAMPI NOW A DANGEROUS CATEGORY 4 MOVING WEST TOWARDS\nGUAM COASTAL WATERS...\n\n.NEW INFORMATION...\nGuam is now in Condition of Readiness 1 as of 1 PM ChST. Rota is now\nin Typhoon Condition of Readiness 1 as of 5 PM ChST. Saipan and Tinian\nremain in Typhoon Condition of Readiness 3.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended actions for\npeople on Guam and on Rota, Tinian and Saipan in the Northern\nMarianas.\n\n.Watches/Warnings...\nA Typhoon Warning continues for Guam and Rota.\n\nA Tropical Storm Warning and a Typhoon Watch continues for Tinian\nand Saipan.\n\nA Flood Watch is in effect for Rota, Tinian and Saipan in the\nNorthern Marianas. Please listen closely for any Flood Warnings that\nmight be in effect for your area.\n\nA Flash Flood Warning is now in effect for Guam.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 7 PM ChST...the center of Typhoon Champi (29W) was located\nnear latitude 12.6N...longitude 146.7E. This was about 140 miles\neast-southeast of Guam. Storm motion was west, 280 degrees, at 15\nmph. Storm intensity was 130 mph. This general forecast track\nwill take Champi just south of Guam as a Category 4 typhoon as it\nintensifies further the next few days.\n\n.SITUATION OVERVIEW...\nTyphoon Champi (29W) has been undergoing rapid intensification\ntoday. As a result it is now a dangerous category 4 typhoon. It is\nexpected to pass a little south of Guam as a super typhoon within\nthe next 12 hours. This may potentially bring devastating wind\nconditions to much of Guam during passage.\n\n.PRECAUTIONARY/PREPAREDNESS ACTIONS...",
  "instruction": "Take small loose objects indoors. Identify suitable shelter. Stock\nup a few days worth of food and water. If no concrete shelter is\navailable look for a cave or something similar. Take action to\nprotect food crops or other possessions as appropriate.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9a5870c872448e6423b4191a0b6d1863ee7a2d3a.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

7 recorded details changed

Title

Before

Typhoon Watch issued October 17 at 9:13AM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 17 at 3:06PM ChST by NWS Tiyan GU

Source updated

Before

16 October 2026 at 23:13 UTC

After

17 October 2026 at 05:06 UTC

Effective from

Before

16 October 2026 at 23:13 UTC

After

17 October 2026 at 05:06 UTC

Forecast onset

Before

16 October 2026 at 23:13 UTC

After

17 October 2026 at 05:06 UTC

Message expiry

Before

17 October 2026 at 08:00 UTC

After

17 October 2026 at 13:15 UTC

Official description

Before

...TYPHOON CHAMPI MOVING WEST-NORTHWEST TOWARDS GUAM... .NEW INFORMATION... Champi upgraded to a typhoon. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam, and on Rota, Tinian and Saipan in the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning in conjuction with a Typhoon Watch continue for Tinian and Saipan. A Coastal Flood Warning is in effect for Guam, Rota, Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flash Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 700 AM ChST, the center of Typhoon Champi (29W) was located near latitude 12.0N and longitude 149.6E. This was about 340 miles east- southeast of Guam. Storm motion was west-northwest, 295 degrees, at 15 mph. Storm intensity was 85 mph. The system is expected to further intensify today, with rapid intensification likely as Champi approaches the Marianas. This general forecast track will take Champi just south of Guam as a category 3 typhoon. .SITUATION OVERVIEW... Showers and winds will steadily increase this afternoon, and then deteriorate significantly from tonight as newly upgraded Typhoon Champi continues to move in from the east-southeast. Champi is expected to go through a period of rapid intensification shortly, strengthening further as the day goes on. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

After

...CHAMPI UPGRADED TO TYPHOON AND BARRELING TOWARD THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides information and recommended action for people on Guam, and people on Rota, Tinian and Saipan in the Commonwealth of the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continue for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 100 PM ChST, the center of Typhoon Champi (29W) was located near latitude 12.5N and longitude 148.0E. This was about 225 miles east- southeast of Guam. Storm motion was west-northwest, 290 degrees, at 18 mph. Storm intensity has increased to 100 mph, making it a Category 2 typhoon. This general forecast track will take Champi just south of Guam as a Category 3 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Showers and winds will continue to steadily increase the rest of today, to then deteriorate significantly tonight as newly upgraded Typhoon Champi continues to move in from the east-southeast. Champi is undergoing a period of rapid intensification, strengthening further as the day goes on. The most recent storm tracks continue to indicate Champi passing either south, or over, Guam Sunday morning, which may potentially bring devastating wind conditions to much of Guam during passage. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.72709b808056f6ef1d8e7631ce1c34eba52dcab0.003.2

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f3ac425658ce0c4107e5c8d6fda782a704256e61.003.2

Bulletin issued: 17 October 2026 at 05:06 UTC

{
  "id": "nws:41816aa5796547b465330a43",
  "authorityId": "urn:oid:2.49.0.1.840.0.f3ac425658ce0c4107e5c8d6fda782a704256e61.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
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      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 17 at 3:06PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-17T05:06:00.000Z",
  "issuedAt": "2026-10-17T05:06:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-17T05:06:00.000Z",
  "onsetAt": "2026-10-17T05:06:00.000Z",
  "expiresAt": "2026-10-17T13:15:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...CHAMPI UPGRADED TO TYPHOON AND BARRELING TOWARD THE MARIANAS...\n\n.NEW INFORMATION...\nNone.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended action for\npeople on Guam, and people on Rota, Tinian and Saipan in the\nCommonwealth of the Northern Marianas.\n\n.Watches/Warnings...\nA Typhoon Warning continues for Guam and Rota.\n\nA Tropical Storm Warning and a Typhoon Watch continue for Tinian and\nSaipan.\n\nA Flood Watch is in effect for all of Guam and the Northern\nMarianas. Please listen closely for any Flood Warnings that might\nbe in effect for your area.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 100 PM ChST, the center of Typhoon Champi (29W) was located near\nlatitude 12.5N and longitude 148.0E. This was about 225 miles east-\nsoutheast of Guam. Storm motion was west-northwest, 290 degrees,\nat 18 mph. Storm intensity has increased to 100 mph, making it a\nCategory 2 typhoon. This general forecast track will take Champi\njust south of Guam as a Category 3 typhoon as it intensifies\nfurther the next few days.\n\n.SITUATION OVERVIEW...\nShowers and winds will continue to steadily increase the rest of\ntoday, to then deteriorate significantly tonight as newly upgraded\nTyphoon Champi continues to move in from the east-southeast. Champi\nis undergoing a period of rapid intensification, strengthening\nfurther as the day goes on. The most recent storm tracks continue to\nindicate Champi passing either south, or over, Guam Sunday morning,\nwhich may potentially bring devastating wind conditions to much of\nGuam during passage. Winds and rain will come in rapidly, with winds\nbecoming dangerous and life threatening very soon after onset. Do not\nlet a false sense of normalcy now dictate your actions tomorrow;\nprepare NOW!",
  "instruction": "Take small loose objects indoors. Identify suitable shelter. Stock\nup a few days worth of food and water. If no concrete shelter is\navailable look for a cave or something similar. Take action to\nprotect food crops or other possessions as appropriate.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f3ac425658ce0c4107e5c8d6fda782a704256e61.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 17 at 3:03AM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 17 at 9:13AM ChST by NWS Tiyan GU

Source updated

Before

16 October 2026 at 17:03 UTC

After

16 October 2026 at 23:13 UTC

Effective from

Before

16 October 2026 at 17:03 UTC

After

16 October 2026 at 23:13 UTC

Forecast onset

Before

16 October 2026 at 17:03 UTC

After

16 October 2026 at 23:13 UTC

Message expiry

Before

17 October 2026 at 01:15 UTC

After

17 October 2026 at 08:00 UTC

Official description

Before

...TROPICAL STORM CHAMPI MOVING WEST TOWARD GUAM... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical storm warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 1 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 150.8E. This was about 420 miles east-southeast of Guam. Storm motion was west, 275 degrees, at 15 mph. Storm intensity was 70 mph. .SITUATION OVERVIEW... TS Champi continues to head toward Guam. Along the way, Rota will be affected by lesser but still damaging winds toward the outside of Champi. Tinian and Saipan will be just grazed by the edge. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

After

...TYPHOON CHAMPI MOVING WEST-NORTHWEST TOWARDS GUAM... .NEW INFORMATION... Champi upgraded to a typhoon. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam, and on Rota, Tinian and Saipan in the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning in conjuction with a Typhoon Watch continue for Tinian and Saipan. A Coastal Flood Warning is in effect for Guam, Rota, Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flash Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 700 AM ChST, the center of Typhoon Champi (29W) was located near latitude 12.0N and longitude 149.6E. This was about 340 miles east- southeast of Guam. Storm motion was west-northwest, 295 degrees, at 15 mph. Storm intensity was 85 mph. The system is expected to further intensify today, with rapid intensification likely as Champi approaches the Marianas. This general forecast track will take Champi just south of Guam as a category 3 typhoon. .SITUATION OVERVIEW... Showers and winds will steadily increase this afternoon, and then deteriorate significantly from tonight as newly upgraded Typhoon Champi continues to move in from the east-southeast. Champi is expected to go through a period of rapid intensification shortly, strengthening further as the day goes on. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

Official instructions

Before

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

After

Take small loose objects indoors. Identify suitable shelter. Stock up a few days worth of food and water. If no concrete shelter is available look for a cave or something similar. Take action to protect food crops or other possessions as appropriate.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0ee6a7519bf9283a0c3ce63c2b1c084561cadc09.003.2

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.72709b808056f6ef1d8e7631ce1c34eba52dcab0.003.2

Bulletin issued: 16 October 2026 at 23:13 UTC

{
  "id": "nws:1fc3bcaf14ab51d739308fa5",
  "authorityId": "urn:oid:2.49.0.1.840.0.72709b808056f6ef1d8e7631ce1c34eba52dcab0.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
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      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 17 at 9:13AM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-16T23:13:00.000Z",
  "issuedAt": "2026-10-16T23:13:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T23:13:00.000Z",
  "onsetAt": "2026-10-16T23:13:00.000Z",
  "expiresAt": "2026-10-17T08:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TYPHOON CHAMPI MOVING WEST-NORTHWEST TOWARDS GUAM...\n\n.NEW INFORMATION...\nChampi upgraded to a typhoon.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended actions for\npeople on Guam, and on Rota, Tinian and Saipan in the Northern\nMarianas.\n\n.WATCHES/WARNINGS...\nA Typhoon Warning continues for Guam and Rota.\nA Tropical Storm Warning in conjuction with a Typhoon Watch continue\nfor Tinian and Saipan.\nA Coastal Flood Warning is in effect for Guam, Rota, Tinian and\nSaipan.\n\nA Flood Watch is in effect for all of Guam and the Northern\nMarianas. Please listen closely for any Flash Flood Warnings that\nmight be in effect for your area.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 700 AM ChST, the center of Typhoon Champi (29W) was located near\nlatitude 12.0N and longitude 149.6E. This was about 340 miles east-\nsoutheast of Guam. Storm motion was west-northwest, 295 degrees, at\n15 mph. Storm intensity was 85 mph. The system is expected to further\nintensify today, with rapid intensification likely as Champi\napproaches the Marianas. This general forecast track will take\nChampi just south of Guam as a category 3 typhoon.\n\n.SITUATION OVERVIEW...\nShowers and winds will steadily increase this afternoon, and then\ndeteriorate significantly from tonight as newly upgraded Typhoon\nChampi continues to move in from the east-southeast. Champi is\nexpected to go through a period of rapid intensification shortly,\nstrengthening further as the day goes on. Winds and rain will come\nin rapidly, with winds becoming dangerous and life threatening very\nsoon after onset. Do not let a false sense of normalcy now dictate\nyour actions tomorrow; prepare NOW!",
  "instruction": "Take small loose objects indoors. Identify suitable shelter. Stock\nup a few days worth of food and water. If no concrete shelter is\navailable look for a cave or something similar. Take action to\nprotect food crops or other possessions as appropriate.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.72709b808056f6ef1d8e7631ce1c34eba52dcab0.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 16 at 9:43PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 17 at 3:03AM ChST by NWS Tiyan GU

Source updated

Before

16 October 2026 at 11:43 UTC

After

16 October 2026 at 17:03 UTC

Effective from

Before

16 October 2026 at 11:43 UTC

After

16 October 2026 at 17:03 UTC

Forecast onset

Before

16 October 2026 at 11:43 UTC

After

16 October 2026 at 17:03 UTC

Message expiry

Before

16 October 2026 at 19:45 UTC

After

17 October 2026 at 01:15 UTC

Official description

Before

...TROPICAL STORM CHAMPI INTENSIFYING AND MOVING WEST TOWARDS THE MARIANAS... ...CHAMPI LIKELY TO MOVE NEAR GUAM AS A TYPHOON... .NEW INFORMATION... Guam was placed in Condition of Readiness 2 as of 1 PM ChST. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical storm warning and a Typhoon Watch continue for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 8 PM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 152.1E. This was about 510 miles east-southeast of Guam. Storm motion was west, 275 degrees, at 13 mph. Storm intensity was 60 mph. .SITUATION OVERVIEW... TS Champi continues to head toward Guam. Along the way, Rota will be affected by lesser bu…

After

...TROPICAL STORM CHAMPI MOVING WEST TOWARD GUAM... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical storm warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 1 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 150.8E. This was about 420 miles east-southeast of Guam. Storm motion was west, 275 degrees, at 15 mph. Storm intensity was 70 mph. .SITUATION OVERVIEW... TS Champi continues to head toward Guam. Along the way, Rota will be affected by lesser bu…

Official instructions

Before

Keep informed and listen for possible changes to the forecast. Comply with any evacuation orders issued for your area. If you live in a metal roof or container home, make plans to evacuate. Gather clothes, important papers, medicines, and small valuables and keep them ready to go on short notice. Gas up your vehicles and have extra cash on hand. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors.

After

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f1dfdbd64986b09a5958ed031fd82e95a9442522.003.2

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0ee6a7519bf9283a0c3ce63c2b1c084561cadc09.003.2

Bulletin issued: 16 October 2026 at 17:03 UTC

{
  "id": "nws:808066404bda18496850e859",
  "authorityId": "urn:oid:2.49.0.1.840.0.0ee6a7519bf9283a0c3ce63c2b1c084561cadc09.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.f1dfdbd64986b09a5958ed031fd82e95a9442522.003.2",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 17 at 3:03AM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-16T17:03:00.000Z",
  "issuedAt": "2026-10-16T17:03:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T17:03:00.000Z",
  "onsetAt": "2026-10-16T17:03:00.000Z",
  "expiresAt": "2026-10-17T01:15:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL STORM CHAMPI MOVING WEST TOWARD GUAM...\n\n.NEW INFORMATION...\nNone.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended actions for\npeople on Guam and on Rota, Tinian and Saipan in the Northern\nMarianas.\n\n.Watches/Warnings...\nA Typhoon Warning continues for Guam and Rota.\n\nA Tropical storm warning and a Typhoon Watch continues for Tinian\nand Saipan.\n\nA Flood Watch is in effect for all of Guam and the Northern\nMarianas. Please listen closely for any Flood Warnings that might\nbe in effect for your area.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 1 AM ChST...the center of Tropical Storm Champi (29W) was located\nnear latitude 11.6N...longitude 150.8E. This was about 420 miles\neast-southeast of Guam. Storm motion was west, 275 degrees, at 15 mph.\nStorm intensity was 70 mph.\n\n.SITUATION OVERVIEW...\nTS Champi continues to head toward Guam. Along the way, Rota will be\naffected by lesser but still damaging winds toward the outside of\nChampi. Tinian and Saipan will be just grazed by the edge.\n\n.PRECAUTIONARY/PREPAREDNESS ACTIONS...",
  "instruction": "Stay calm and keep informed. Comply with any evacuation orders\nthat are issued for your area. If you live in a metal roof or\ncontainer home, or you live in a surge zone or any location prone\nto flooding, evacuate to a designated shelter or ride out the\nstorm in the sturdy home of family or friends outside of\nevacuation zones.\n\nItems to bring to a shelter include a first aid kit, medicines\nand prescriptions, baby food and diapers, games and books,\ntoiletries, a battery powered radio, a cell phone, flashlights\nwith extra batteries, a blanket or sleeping bag for each person,\npersonal identification, copies of key papers such as insurance\npolicies, available cash and credit cards. Remember, pets are not\nallowed in most public shelters, so check ahead with your\nintended shelter.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors. Do\nthis as early as possible.\n\nIf you need to make a trip to the hardware store, the grocery\nstore, or the gas station, do so as early as possible.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0ee6a7519bf9283a0c3ce63c2b1c084561cadc09.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 16 at 4:11PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 16 at 9:43PM ChST by NWS Tiyan GU

Source updated

Before

16 October 2026 at 06:11 UTC

After

16 October 2026 at 11:43 UTC

Effective from

Before

16 October 2026 at 06:11 UTC

After

16 October 2026 at 11:43 UTC

Forecast onset

Before

16 October 2026 at 06:11 UTC

After

16 October 2026 at 11:43 UTC

Message expiry

Before

16 October 2026 at 14:15 UTC

After

16 October 2026 at 19:45 UTC

Official description

Before

...TROPICAL STORM CHAMPI MOVING RAPIDLY WEST ON APPROACH TO THE MARIANAS... ...CHAMPI LIKELY TO MOVE NEAR GUAM AND ROTA AS A TYPHOON... .NEW INFORMATION... A Typhoon Warning has been issued for Guam, Rota, and the adjacent waters. A Tropical Storm Warning has been issued for Tinian, Saipan, and the adjacent waters. .AREAS AFFECTED... This local statement provides information and recommended action for people on Guam, and people on Rota, Tinian and Saipan in the Commonwealth of the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning is in effect for Guam and Rota. A Tropical Storm Warning is in effect for Tinian and Saipan. A Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 200 PM ChST, the center of Tropical Storm Champi (29W) was located near latitude 11.4N and longitude 153.3E, about 300 miles north- northeast of Chuuk and about 590 miles east-southeast of Guam. Storm motion was west, 265 degrees, at 24 mph. Storm intensity was 50 mph. Champi will continue on this trajectory and slow down as it continues barreling toward the Marianas. This general forecast track will take Champi close to, or over, Guam Sunday morning. Champi is forecast to continue intensifying over the next few days, likely becoming a typhoon by Saturday. .SITUATION OVERVIEW... Mostly benign conditions are expected across the Marianas tonight, followed by a steady increase in showers and winds Friday afternoon, and then deteriorating significantly coming into Saturday night as Tropical Storm Champi continues to move in from the east-southeast. Champi is expected to go through a period of rapid intensification over the next 24 hours, becoming a typhoon by Saturday and strengthening further thereafter. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

After

...TROPICAL STORM CHAMPI INTENSIFYING AND MOVING WEST TOWARDS THE MARIANAS... ...CHAMPI LIKELY TO MOVE NEAR GUAM AS A TYPHOON... .NEW INFORMATION... Guam was placed in Condition of Readiness 2 as of 1 PM ChST. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical storm warning and a Typhoon Watch continue for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 8 PM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 152.1E. This was about 510 miles east-southeast of Guam. Storm motion was west, 275 degrees, at 13 mph. Storm intensity was 60 mph. .SITUATION OVERVIEW... TS Champi continues to head toward Guam. Along the way, Rota will be affected by lesser but still damaging winds toward the outside of Champi. Tinian and Saipan will be just grazed by the edge. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

Official instructions

Before

Take small loose objects indoors. Identify suitable shelter. Stock up a few days worth of food and water. If no concrete shelter is available look for a cave or something similar. Take action to protect food crops or other possessions as appropriate.

After

Keep informed and listen for possible changes to the forecast. Comply with any evacuation orders issued for your area. If you live in a metal roof or container home, make plans to evacuate. Gather clothes, important papers, medicines, and small valuables and keep them ready to go on short notice. Gas up your vehicles and have extra cash on hand. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8b3ecad2910ecff02ba0338c6ab40c35cd21e03e.003.2

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f1dfdbd64986b09a5958ed031fd82e95a9442522.003.2

Bulletin issued: 16 October 2026 at 11:43 UTC

{
  "id": "nws:4f11d7cac803a73cd3b06f66",
  "authorityId": "urn:oid:2.49.0.1.840.0.f1dfdbd64986b09a5958ed031fd82e95a9442522.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.8b3ecad2910ecff02ba0338c6ab40c35cd21e03e.003.2",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 16 at 9:43PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-16T11:43:00.000Z",
  "issuedAt": "2026-10-16T11:43:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T11:43:00.000Z",
  "onsetAt": "2026-10-16T11:43:00.000Z",
  "expiresAt": "2026-10-16T19:45:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL STORM CHAMPI INTENSIFYING AND MOVING WEST TOWARDS THE\nMARIANAS...\n...CHAMPI LIKELY TO MOVE NEAR GUAM AS A TYPHOON...\n\n.NEW INFORMATION...\nGuam was placed in Condition of Readiness 2 as of 1 PM ChST.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended actions for\npeople on Guam and on Rota, Tinian and Saipan in the Northern\nMarianas.\n\n.Watches/Warnings...\nA Typhoon Warning continues for Guam and Rota.\n\nA Tropical storm warning and a Typhoon Watch continue for Tinian\nand Saipan.\n\nA Flood Watch is in effect for all of Guam and the Northern\nMarianas. Please listen closely for any Flood Warnings that might\nbe in effect for your area.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 8 PM ChST...the center of Tropical Storm Champi (29W) was located\nnear latitude 11.6N...longitude 152.1E. This was about 510 miles\neast-southeast of Guam. Storm motion was west, 275 degrees, at 13 mph.\nStorm intensity was 60 mph.\n\n.SITUATION OVERVIEW...\nTS Champi continues to head toward Guam. Along the way, Rota will be\naffected by lesser but still damaging winds toward the outside of\nChampi. Tinian and Saipan will be just grazed by the edge.\n\n.PRECAUTIONARY/PREPAREDNESS ACTIONS...",
  "instruction": "Keep informed and listen for possible changes to the forecast.\nComply with any evacuation orders issued for your area. If you\nlive in a metal roof or container home, make plans to evacuate.\n\nGather clothes, important papers, medicines, and small valuables\nand keep them ready to go on short notice. Gas up your vehicles\nand have extra cash on hand.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f1dfdbd64986b09a5958ed031fd82e95a9442522.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

10 recorded details changed

Title

Before

Typhoon Watch issued October 16 at 8:50AM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 16 at 4:11PM ChST by NWS Tiyan GU

Source updated

Before

15 October 2026 at 22:50 UTC

After

16 October 2026 at 06:11 UTC

Effective from

Before

15 October 2026 at 22:50 UTC

After

16 October 2026 at 06:11 UTC

Forecast onset

Before

15 October 2026 at 22:50 UTC

After

16 October 2026 at 06:11 UTC

Message expiry

Before

16 October 2026 at 08:00 UTC

After

16 October 2026 at 14:15 UTC

Reported area

Before

Guam; Rota; Tinian; Saipan

After

Tinian; Saipan

Source summary

Before

Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.

After

Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.

Official description

Before

...TROPICAL STORM CHAMPI CONTINUES WEST-NORTHWEST TOWARD THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the Mariana Islands. A Flood Watch remains in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. .STORM INFORMATION... At 7 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 155.8E. This was about 750 miles east of Guam. Storm motion was west-northwest, 300 degrees, at 12 mph. Storm intensity was 45 mph. .SITUATION OVERVIEW... When making decisions, do not focus on the exact forecast track. It is too early to provide exact wind and surge forecast values for specific locations. A general concern should be for the possibility of at least extensive damage somewhere within Guam and the Northern Marianas.

After

...TROPICAL STORM CHAMPI MOVING RAPIDLY WEST ON APPROACH TO THE MARIANAS... ...CHAMPI LIKELY TO MOVE NEAR GUAM AND ROTA AS A TYPHOON... .NEW INFORMATION... A Typhoon Warning has been issued for Guam, Rota, and the adjacent waters. A Tropical Storm Warning has been issued for Tinian, Saipan, and the adjacent waters. .AREAS AFFECTED... This local statement provides information and recommended action for people on Guam, and people on Rota, Tinian and Saipan in the Commonwealth of the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning is in effect for Guam and Rota. A Tropical Storm Warning is in effect for Tinian and Saipan. A Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 200 PM ChST, the center of Tropical Storm Champi (29W) was located near latitude 11.4N and longitude 153.3E, about 300 miles north- northeast of Chuuk and about 590 miles east-southeast of Guam. Storm motion was west, 265 degrees, at 24 mph. Storm intensity was 50 mph. Champi will continue on this trajectory and slow down as it continues barreling toward the Marianas. This general forecast track will take Champi close to, or over, Guam Sunday morning. Champi is forecast to continue intensifying over the next few days, likely becoming a typhoon by Saturday. .SITUATION OVERVIEW... Mostly benign conditions are expected across the Marianas tonight, followed by a steady increase in showers and winds Friday afternoon, and then deteriorating significantly coming into Saturday night as Tropical Storm Champi continues to move in from the east-southeast. Champi is expected to go through a period of rapid intensification over the next 24 hours, becoming a typhoon by Saturday and strengthening further thereafter. Winds and rain will come in rapidly, with winds becoming dangerous and life threatening very soon after onset. Do not let a false sense of normalcy now dictate your actions tomorrow; prepare NOW!

Official instructions

Before

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

After

Take small loose objects indoors. Identify suitable shelter. Stock up a few days worth of food and water. If no concrete shelter is available look for a cave or something similar. Take action to protect food crops or other possessions as appropriate.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b5cb625f12b9fc5bb56b6921e3b6c379d542f776.001.1

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8b3ecad2910ecff02ba0338c6ab40c35cd21e03e.003.2

Bulletin issued: 16 October 2026 at 06:11 UTC

{
  "id": "nws:854b7bc54868704d8bca4690",
  "authorityId": "urn:oid:2.49.0.1.840.0.8b3ecad2910ecff02ba0338c6ab40c35cd21e03e.003.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.b5cb625f12b9fc5bb56b6921e3b6c379d542f776.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 16 at 4:11PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-16T06:11:00.000Z",
  "issuedAt": "2026-10-16T06:11:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T06:11:00.000Z",
  "onsetAt": "2026-10-16T06:11:00.000Z",
  "expiresAt": "2026-10-16T14:15:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL STORM CHAMPI MOVING RAPIDLY WEST ON APPROACH TO THE\nMARIANAS...\n...CHAMPI LIKELY TO MOVE NEAR GUAM AND ROTA AS A TYPHOON...\n\n.NEW INFORMATION...\nA Typhoon Warning has been issued for Guam, Rota, and the adjacent\nwaters.\nA Tropical Storm Warning has been issued for Tinian, Saipan, and the\nadjacent waters.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended action for\npeople on Guam, and people on Rota, Tinian and Saipan in the\nCommonwealth of the Northern Marianas.\n\n.WATCHES/WARNINGS...\nA Typhoon Warning is in effect for Guam and Rota.\nA Tropical Storm Warning is in effect for Tinian and Saipan.\nA Typhoon Watch continues for Tinian and Saipan.\n\nA Flood Watch is in effect for all of Guam and the Northern Marianas.\nPlease listen closely for any Flood Warnings that might be in effect\nfor your area.\n\nPlease check the latest public and marine forecasts for detailed\ninformation about additional hazards.\n\n.STORM INFORMATION...\nAt 200 PM ChST, the center of Tropical Storm Champi (29W) was located\nnear latitude 11.4N and longitude 153.3E, about 300 miles north-\nnortheast of Chuuk and about 590 miles east-southeast of Guam. Storm\nmotion was west, 265 degrees, at 24 mph. Storm intensity was 50 mph.\nChampi will continue on this trajectory and slow down as it continues\nbarreling toward the Marianas. This general forecast track will take\nChampi close to, or over, Guam Sunday morning. Champi is forecast to\ncontinue intensifying over the next few days, likely becoming a\ntyphoon by Saturday.\n\n.SITUATION OVERVIEW...\nMostly benign conditions are expected across the Marianas tonight,\nfollowed by a steady increase in showers and winds Friday afternoon,\nand then deteriorating significantly coming into Saturday night as\nTropical Storm Champi continues to move in from the east-southeast.\nChampi is expected to go through a period of rapid intensification\nover the next 24 hours, becoming a typhoon by Saturday and\nstrengthening further thereafter. Winds and rain will come in\nrapidly, with winds becoming dangerous and life threatening very soon\nafter onset. Do not let a false sense of normalcy now dictate your\nactions tomorrow; prepare NOW!",
  "instruction": "Take small loose objects indoors. Identify suitable shelter. Stock\nup a few days worth of food and water. If no concrete shelter is\navailable look for a cave or something similar. Take action to\nprotect food crops or other possessions as appropriate.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8b3ecad2910ecff02ba0338c6ab40c35cd21e03e.003.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 16 at 3:01AM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 16 at 8:50AM ChST by NWS Tiyan GU

Source updated

Before

15 October 2026 at 17:01 UTC

After

15 October 2026 at 22:50 UTC

Effective from

Before

15 October 2026 at 17:01 UTC

After

15 October 2026 at 22:50 UTC

Forecast onset

Before

15 October 2026 at 17:01 UTC

After

15 October 2026 at 22:50 UTC

Message expiry

Before

16 October 2026 at 01:15 UTC

After

16 October 2026 at 08:00 UTC

Official description

Before

...TROPICAL STORM CHAMPI IS MOVING TOWARD THE MARIANAS... .NEW INFORMATION... Champi (29W) has been upgraded to a tropical storm and is moving west with sustained winds of 40 mph. A Flood Watch has been issued for the Guam, Rota, Tinian, and Saipan. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan. A Flood Watch is now in effect for Guam, Rota, Tinian, and Saipan. .STORM INFORMATION... At 1 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.1N...longitude 156.8E. This was about 820 miles east of Guam. Storm motion was west, 280 degrees, at 12 mph. Storm intensity was 40 mph. .SITUATION OVERVIEW... It is important not to focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Storm Champi (29W) is currently moving west towards the Marianas. Damaging winds are likely within Guam and the Northern Marianas late Saturday night and Sunday. At this time it appears that the strongest winds will be towards the southernmost islands. Islands near the center should prepare for typhoon force winds, with the latest JTWC forecast showing sustained winds of roughly 90 knots. .PRECAUTIONARY/PREPAREDNESS ACTIONS... ...NEW INFORMATION... Champi (29W) has been upgraded to a tropical storm and is moving west with sustained winds of 40 mph.

After

...TROPICAL STORM CHAMPI CONTINUES WEST-NORTHWEST TOWARD THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the Mariana Islands. A Flood Watch remains in effect for all of Guam and the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. .STORM INFORMATION... At 7 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.6N...longitude 155.8E. This was about 750 miles east of Guam. Storm motion was west-northwest, 300 degrees, at 12 mph. Storm intensity was 45 mph. .SITUATION OVERVIEW... When making decisions, do not focus on the exact forecast track. It is too early to provide exact wind and surge forecast values for specific locations. A general concern should be for the possibility of at least extensive damage somewhere within Guam and the Northern Marianas.

Official instructions

Before

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

After

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7ee54195408d51ce99aac452db39965fc69c8133.001.1

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b5cb625f12b9fc5bb56b6921e3b6c379d542f776.001.1

Bulletin issued: 15 October 2026 at 22:50 UTC

{
  "id": "nws:621fead31fe09b32dee13c23",
  "authorityId": "urn:oid:2.49.0.1.840.0.b5cb625f12b9fc5bb56b6921e3b6c379d542f776.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.7ee54195408d51ce99aac452db39965fc69c8133.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 16 at 8:50AM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-15T22:50:00.000Z",
  "issuedAt": "2026-10-15T22:50:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T22:50:00.000Z",
  "onsetAt": "2026-10-15T22:50:00.000Z",
  "expiresAt": "2026-10-16T08:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Guam; Rota; Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL STORM CHAMPI CONTINUES WEST-NORTHWEST TOWARD THE\nMARIANAS...\n\n.NEW INFORMATION...\nNone.\n\n.AREAS AFFECTED...\nThis local statement provides important information and recommended\nactions for people in Guam and the Northern Marianas.\n\n.WATCHES/WARNINGS...\nA Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the\nMariana Islands.\n\nA Flood Watch remains in effect for all of Guam and the Northern\nMarianas. Please listen closely for any Flood Warnings that might be\nin effect for your area.\n\n.STORM INFORMATION...\nAt 7 AM ChST...the center of Tropical Storm Champi (29W) was located\nnear latitude 11.6N...longitude 155.8E. This was about 750 miles\neast of Guam. Storm motion was west-northwest, 300 degrees, at 12\nmph. Storm intensity was 45 mph.\n\n.SITUATION OVERVIEW...\nWhen making decisions, do not focus on the exact forecast track. It\nis too early to provide exact wind and surge forecast values for\nspecific locations. A general concern should be for the possibility\nof at least extensive damage somewhere within Guam and the Northern\nMarianas.",
  "instruction": "Stay calm and keep informed. Comply with any evacuation orders that\nare issued for your area. If you live in a metal roof or container\nhome, or you live in a surge zone or any location prone to flooding,\nevacuate to a designated shelter or ride out the storm in the sturdy\nhome of family or friends outside of evacuation zones.\n\nItems to bring to a shelter include a first aid kit, medicines and\nprescriptions, baby food and diapers, games and books, toiletries, a\nbattery powered radio, a cell phone, flashlights with extra batteries,\na blanket or sleeping bag for each person, personal identification,\ncopies of key papers such as insurance policies, available cash and\ncredit cards. Remember, pets are not allowed in most public shelters,\nso check ahead with your intended shelter.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors. Do this as\nearly as possible.\n\nIf you need to make a trip to the hardware store, the grocery store,\nor the gas station, do so as early as possible.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b5cb625f12b9fc5bb56b6921e3b6c379d542f776.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 15 at 8:56PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 16 at 3:01AM ChST by NWS Tiyan GU

Source updated

Before

15 October 2026 at 10:56 UTC

After

15 October 2026 at 17:01 UTC

Effective from

Before

15 October 2026 at 10:56 UTC

After

15 October 2026 at 17:01 UTC

Forecast onset

Before

15 October 2026 at 10:56 UTC

After

15 October 2026 at 17:01 UTC

Message expiry

Before

15 October 2026 at 19:00 UTC

After

16 October 2026 at 01:15 UTC

Official description

Before

...TROPICAL DEPRESSION CHAMPI MOVING WEST-NORTHWEST... .NEW INFORMATION... Guam is now in Condition of Readiness 3, meaning damaging winds are possible within 48 hours. .AREAS AFFECTED... This local statement provides information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon watch continues for Guam, Rota, Tinian, and Saipan. .STORM INFORMATION... At 7 PM ChST...the center of Tropical Depression Champi (29W) was located near latitude 11.0N...longitude 157.8E. This was about 890 miles east of Guam. Storm motion was west-northwest, 285 degrees, at 10 mph. Storm intensity was 35 mph. .SITUATION OVERVIEW... It is vital that you do not focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Depression 29W is currently moving west-northwest, but is expected to make a turn toward the west Friday. Damaging winds are likely within Guam and the Northern Marianas late Saturday night and Sunday. At this time it appears that the strongest winds will be towards the southernmost islands. Islands near the center should prepare for typhoon force winds, with the latest JTWC forecast showing sustained winds of roughly 85 knots. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

After

...TROPICAL STORM CHAMPI IS MOVING TOWARD THE MARIANAS... .NEW INFORMATION... Champi (29W) has been upgraded to a tropical storm and is moving west with sustained winds of 40 mph. A Flood Watch has been issued for the Guam, Rota, Tinian, and Saipan. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan. A Flood Watch is now in effect for Guam, Rota, Tinian, and Saipan. .STORM INFORMATION... At 1 AM ChST...the center of Tropical Storm Champi (29W) was located near latitude 11.1N...longitude 156.8E. This was about 820 miles east of Guam. Storm motion was west, 280 degrees, at 12 mph. Storm intensity was 40 mph. .SITUATION OVERVIEW... It is important not to focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Storm Champi (29W) is currently moving west towards the Marianas. Damaging winds are likely within Guam and the Northern Marianas late Saturday night and Sunday. At this time it appears that the strongest winds will be towards the southernmost islands. Islands near the center should prepare for typhoon force winds, with the latest JTWC forecast showing sustained winds of roughly 90 knots. .PRECAUTIONARY/PREPAREDNESS ACTIONS... ...NEW INFORMATION... Champi (29W) has been upgraded to a tropical storm and is moving west with sustained winds of 40 mph.

Official instructions

Before

…icies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture an…

After

…icies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture an…

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.abcf573ac2c8c3c15a5c6afb9d4aede92d1f346e.001.1

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7ee54195408d51ce99aac452db39965fc69c8133.001.1

Bulletin issued: 15 October 2026 at 17:01 UTC

{
  "id": "nws:1479ca91a83c29fad4fe25e8",
  "authorityId": "urn:oid:2.49.0.1.840.0.7ee54195408d51ce99aac452db39965fc69c8133.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.abcf573ac2c8c3c15a5c6afb9d4aede92d1f346e.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 16 at 3:01AM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-15T17:01:00.000Z",
  "issuedAt": "2026-10-15T17:01:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T17:01:00.000Z",
  "onsetAt": "2026-10-15T17:01:00.000Z",
  "expiresAt": "2026-10-16T01:15:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Guam; Rota; Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL STORM CHAMPI IS MOVING TOWARD THE MARIANAS...\n\n.NEW INFORMATION...\nChampi (29W) has been upgraded to a tropical storm and is moving\nwest with sustained winds of 40 mph. A Flood Watch has been issued\nfor the Guam, Rota, Tinian, and Saipan.\n\n.AREAS AFFECTED...\nThis local statement provides important information and\nrecommended actions for people in Guam and the Northern Marianas.\n\n.Watches/Warnings...\nA Typhoon Watch continues for Guam, Rota, Tinian, and Saipan.\nA Flood Watch is now in effect for Guam, Rota, Tinian, and Saipan.\n\n.STORM INFORMATION...\nAt 1 AM ChST...the center of Tropical Storm Champi (29W) was\nlocated near latitude 11.1N...longitude 156.8E. This was about 820\nmiles east of Guam. Storm motion was west, 280 degrees, at 12\nmph. Storm intensity was 40 mph.\n\n.SITUATION OVERVIEW...\nIt is important not to focus on the exact forecast track. To do\nso could result in bad decisions and place you or those you are\nresponsible for at greater risk. Tropical Storm Champi (29W) is\ncurrently moving west towards the Marianas.\n\nDamaging winds are likely within Guam and the Northern Marianas\nlate Saturday night and Sunday. At this time it appears that the\nstrongest winds will be towards the southernmost islands. Islands\nnear the center should prepare for typhoon force winds, with the\nlatest JTWC forecast showing sustained winds of roughly 90 knots.\n\n.PRECAUTIONARY/PREPAREDNESS ACTIONS...\n\n...NEW INFORMATION...\nChampi (29W) has been upgraded to a tropical storm and is moving\nwest with sustained winds of 40 mph.",
  "instruction": "Stay calm and keep informed. Comply with any evacuation orders\nthat are issued for your area. If you live in a metal roof or\ncontainer home, or you live in a surge zone or any location prone\nto flooding, evacuate to a designated shelter or ride out the\nstorm in the sturdy home of family or friends outside of\nevacuation zones.\n\nItems to bring to a shelter include a first aid kit, medicines\nand prescriptions, baby food and diapers, games and books,\ntoiletries, a battery powered radio, a cell phone, flashlights\nwith extra batteries, a blanket or sleeping bag for each person,\npersonal identification, copies of key papers such as insurance\npolicies, available cash and credit cards. Remember, pets are not\nallowed in most public shelters, so check ahead with your intended\nshelter.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors. Do\nthis as early as possible.\n\nIf you need to make a trip to the hardware store, the grocery\nstore, or the gas station, do so as early as possible.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7ee54195408d51ce99aac452db39965fc69c8133.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

8 recorded details changed

Title

Before

Typhoon Watch issued October 15 at 3:49PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 15 at 8:56PM ChST by NWS Tiyan GU

Source updated

Before

15 October 2026 at 05:49 UTC

After

15 October 2026 at 10:56 UTC

Effective from

Before

15 October 2026 at 05:49 UTC

After

15 October 2026 at 10:56 UTC

Forecast onset

Before

15 October 2026 at 05:49 UTC

After

15 October 2026 at 10:56 UTC

Message expiry

Before

15 October 2026 at 14:00 UTC

After

15 October 2026 at 19:00 UTC

Official description

Before

...A TYPHOON WATCH REMAINS IN EFFECT FOR THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the Mariana Islands. A Typhoon Watch means that Typhoon conditions, including winds of 74 mph or greater, are possible within the next 48 hours somewhere within the specified areas. .STORM INFORMATION... At 1 PM ChST...the center of Tropical Depression 29W was located near latitude 10.8N...longitude 158.9E. This was about 970 miles east of Guam. Storm motion was west-northwest, 285 degrees, at 13 mph. 29W is expected to make a turn toward the west over the next couple of days. Storm intensity was 35 mph. 29W is expected to begin to intensify Friday. .SITUATION OVERVIEW... It is vital that you do not focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Depression 29W is currently moving west-northwest, but is expected to make a turn toward the west through this evening. It is too early to provide exact wind and surge forecast values for specific locations. A general concern should be for the possibility of at least widespread damage somewhere within Guam and the Northern Marianas. A Flood Watch is also likely for the Marianas.

After

...TROPICAL DEPRESSION CHAMPI MOVING WEST-NORTHWEST... .NEW INFORMATION... Guam is now in Condition of Readiness 3, meaning damaging winds are possible within 48 hours. .AREAS AFFECTED... This local statement provides information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon watch continues for Guam, Rota, Tinian, and Saipan. .STORM INFORMATION... At 7 PM ChST...the center of Tropical Depression Champi (29W) was located near latitude 11.0N...longitude 157.8E. This was about 890 miles east of Guam. Storm motion was west-northwest, 285 degrees, at 10 mph. Storm intensity was 35 mph. .SITUATION OVERVIEW... It is vital that you do not focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Depression 29W is currently moving west-northwest, but is expected to make a turn toward the west Friday. Damaging winds are likely within Guam and the Northern Marianas late Saturday night and Sunday. At this time it appears that the strongest winds will be towards the southernmost islands. Islands near the center should prepare for typhoon force winds, with the latest JTWC forecast showing sustained winds of roughly 85 knots. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

Official instructions

Before

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture an…

After

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture an…

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.265ea36c16109a39c2baf5c9102779a56c826b28.001.1

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.abcf573ac2c8c3c15a5c6afb9d4aede92d1f346e.001.1

Bulletin issued: 15 October 2026 at 10:56 UTC

{
  "id": "nws:3ec9ea575b051148f23f396c",
  "authorityId": "urn:oid:2.49.0.1.840.0.abcf573ac2c8c3c15a5c6afb9d4aede92d1f346e.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.36bad8ed1f75073d95089ccf80fa9e38379ebf01.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    },
    {
      "identifier": "urn:oid:2.49.0.1.840.0.265ea36c16109a39c2baf5c9102779a56c826b28.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 15 at 8:56PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-15T10:56:00.000Z",
  "issuedAt": "2026-10-15T10:56:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T10:56:00.000Z",
  "onsetAt": "2026-10-15T10:56:00.000Z",
  "expiresAt": "2026-10-15T19:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Guam; Rota; Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...TROPICAL DEPRESSION CHAMPI MOVING WEST-NORTHWEST...\n\n.NEW INFORMATION...\nGuam is now in Condition of Readiness 3, meaning damaging winds are\npossible within 48 hours.\n\n.AREAS AFFECTED...\nThis local statement provides information and recommended actions\nfor people in Guam and the Northern Marianas.\n\n.Watches/Warnings...\nA Typhoon watch continues for Guam, Rota, Tinian, and Saipan.\n\n.STORM INFORMATION...\nAt 7 PM ChST...the center of Tropical Depression Champi (29W) was\nlocated near latitude 11.0N...longitude 157.8E. This was about\n890 miles east of Guam. Storm motion was west-northwest,\n285 degrees, at 10 mph. Storm intensity was 35 mph.\n\n.SITUATION OVERVIEW...\nIt is vital that you do not focus on the exact forecast track. To\ndo so could result in bad decisions and place you or those you\nare responsible for at greater risk. Tropical Depression 29W is\ncurrently moving west-northwest, but is expected to make a turn\ntoward the west Friday.\n\nDamaging winds are likely within Guam and the Northern Marianas late\nSaturday night and Sunday. At this time it appears that the strongest\nwinds will be towards the southernmost islands. Islands near the\ncenter should prepare for typhoon force winds, with the latest JTWC\nforecast showing sustained winds of roughly 85 knots.\n\n.PRECAUTIONARY/PREPAREDNESS ACTIONS...",
  "instruction": "Stay calm and keep informed. Comply with any evacuation orders\nthat are issued for your area. If you live in a metal roof or\ncontainer home, or you live in a surge zone or any location prone\nto flooding, evacuate to a designated shelter or ride out the\nstorm in the sturdy home of family or friends outside of\nevacuation zones.\n\nItems to bring to a shelter include a first aid kit, medicines\nand prescriptions, baby food and diapers, games and books,\ntoiletries, a battery powered radio, a cell phone, flashlights\nwith extra batteries, a blanket or sleeping bag for each person,\npersonal identification, copies of key papers such as insurance\npolicies, available cash and credit cards. Remember, pets are not\nallowed in most public shelters, so check ahead with your\nintended shelter.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors. Do\nthis as early as possible.\n\nIf you need to make a trip to the hardware store, the grocery\nstore, or the gas station, do so as early as possible.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.abcf573ac2c8c3c15a5c6afb9d4aede92d1f346e.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Source status changed

Title

Before

Typhoon Watch issued October 15 at 2:42PM ChST by NWS Tiyan GU

After

Typhoon Watch issued October 15 at 3:49PM ChST by NWS Tiyan GU

Source updated

Before

15 October 2026 at 04:42 UTC

After

15 October 2026 at 05:49 UTC

Effective from

Before

15 October 2026 at 04:42 UTC

After

15 October 2026 at 05:49 UTC

Forecast onset

Before

15 October 2026 at 04:42 UTC

After

15 October 2026 at 05:49 UTC

Message expiry

Before

15 October 2026 at 12:00 UTC

After

15 October 2026 at 14:00 UTC

Message type

Before

Alert

After

Update

Source status

Before

Source alert

After

Source update

Official description

Before

...A TYPHOON WATCH IS NOW IN EFFECT FOR THE MARIANAS... .NEW INFORMATION... A Typhoon Watch has now been issued for Guam, Rota, Tinian and Saipan in the Mariana Islands. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon watch is in effect for Guam, Rota, Tinian, and Saipan in the Mariana Islands. A Typhoon Watch means that Typhoon conditions, including winds of 74 mph or greater, are possible within the next 48 hours somewhere within the specified areas. All persons in the watch areas should review their preparedness plan and begin to take actions to prepare for conditions as indicated by your local forecast and additional details. .STORM INFORMATION... At 1 PM ChST...the center of Tropical Depression 29W was located near latitude 10.8N...longitude 158.9E. This was about 970 miles east of Guam. Storm motion was west-northwest, 285 degrees, at 13 mph. 29W is expected to make a turn toward the west over the next couple of days. Storm intensity was 35 mph. 29W is expected to begin to intensify Friday. .SITUATION OVERVIEW... A Typhoon Watch has now been issued. A more detailed statement will follow shortly.

After

...A TYPHOON WATCH REMAINS IN EFFECT FOR THE MARIANAS... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .Watches/Warnings... A Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the Mariana Islands. A Typhoon Watch means that Typhoon conditions, including winds of 74 mph or greater, are possible within the next 48 hours somewhere within the specified areas. .STORM INFORMATION... At 1 PM ChST...the center of Tropical Depression 29W was located near latitude 10.8N...longitude 158.9E. This was about 970 miles east of Guam. Storm motion was west-northwest, 285 degrees, at 13 mph. 29W is expected to make a turn toward the west over the next couple of days. Storm intensity was 35 mph. 29W is expected to begin to intensify Friday. .SITUATION OVERVIEW... It is vital that you do not focus on the exact forecast track. To do so could result in bad decisions and place you or those you are responsible for at greater risk. Tropical Depression 29W is currently moving west-northwest, but is expected to make a turn toward the west through this evening. It is too early to provide exact wind and surge forecast values for specific locations. A general concern should be for the possibility of at least widespread damage somewhere within Guam and the Northern Marianas. A Flood Watch is also likely for the Marianas.

Official instructions

Before

. For those under a watch, now is the time to initiate preparations according to your typhoon disaster plan specific to your home or business. For those nearby, review your typhoon disaster plan and become ready to act if a watch or a warning is later issued for your area. It is important to actively listen for forthcoming information from your local National Weather Service office and emergency management agency.

After

Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible.

External source link

Before

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.36bad8ed1f75073d95089ccf80fa9e38379ebf01.001.1

After

https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.265ea36c16109a39c2baf5c9102779a56c826b28.001.1

Bulletin issued: 15 October 2026 at 05:49 UTC

{
  "id": "nws:7e7357ac5bf2a23516abafd2",
  "authorityId": "urn:oid:2.49.0.1.840.0.265ea36c16109a39c2baf5c9102779a56c826b28.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.36bad8ed1f75073d95089ccf80fa9e38379ebf01.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Typhoon Watch issued October 15 at 3:49PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-15T05:49:00.000Z",
  "issuedAt": "2026-10-15T05:49:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T05:49:00.000Z",
  "onsetAt": "2026-10-15T05:49:00.000Z",
  "expiresAt": "2026-10-15T14:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Update",
  "status": "Source update",
  "place": "Guam; Rota; Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...A TYPHOON WATCH REMAINS IN EFFECT FOR THE MARIANAS...\n\n.NEW INFORMATION...\nNone.\n\n.AREAS AFFECTED...\nThis local statement provides important information and\nrecommended actions for people in Guam and the Northern Marianas.\n\n.Watches/Warnings...\nA Typhoon Watch continues for Guam, Rota, Tinian, and Saipan in the\nMariana Islands.\n\nA Typhoon Watch means that Typhoon conditions, including winds of 74\nmph or greater, are possible within the next 48 hours somewhere\nwithin the specified areas.\n\n.STORM INFORMATION...\nAt 1 PM ChST...the center of Tropical Depression 29W was located\nnear latitude 10.8N...longitude 158.9E. This was about 970 miles\neast of Guam. Storm motion was west-northwest, 285 degrees, at\n13 mph. 29W is expected to make a turn toward the west over the next\ncouple of days. Storm intensity was 35 mph. 29W is expected to begin\nto intensify Friday.\n\n.SITUATION OVERVIEW...\nIt is vital that you do not focus on the exact forecast track. To\ndo so could result in bad decisions and place you or those you\nare responsible for at greater risk. Tropical Depression 29W is\ncurrently moving west-northwest, but is expected to make a turn\ntoward the west through this evening. It is too early to provide\nexact wind and surge forecast values for specific locations. A\ngeneral concern should be for the possibility of at least widespread\ndamage somewhere within Guam and the Northern Marianas. A Flood\nWatch is also likely for the Marianas.",
  "instruction": "Stay calm and keep informed. Comply with any evacuation orders that\nare issued for your area. If you live in a metal roof or container\nhome, or you live in a surge zone or any location prone to flooding,\nevacuate to a designated shelter or ride out the storm in the sturdy\nhome of family or friends outside of evacuation zones.\n\nItems to bring to a shelter include a first aid kit, medicines\nand prescriptions, baby food and diapers, games and books,\ntoiletries, a battery powered radio, a cell phone, flashlights\nwith extra batteries, a blanket or sleeping bag for each person,\npersonal identification, copies of key papers such as insurance\npolicies, available cash and credit cards. Remember, pets are not\nallowed in most public shelters, so check ahead with your intended\nshelter.\n\nRegarding your home or business, cover all windows and doors with\nshutters or plywood. Move patio furniture and other loose objects\nindoors. Brace all exterior doors, including garage doors. Do\nthis as early as possible.\n\nIf you need to make a trip to the hardware store, the grocery\nstore, or the gas station, do so as early as possible.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.265ea36c16109a39c2baf5c9102779a56c826b28.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

First saved record

Our first saved version of Typhoon Watch issued October 15 at 2:42PM ChST by NWS Tiyan GU. We have no earlier saved version to compare.

Bulletin issued: 15 October 2026 at 04:42 UTC

{
  "id": "nws:ba9303f9280f0706458940f5",
  "authorityId": "urn:oid:2.49.0.1.840.0.36bad8ed1f75073d95089ccf80fa9e38379ebf01.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Typhoon Watch issued October 15 at 2:42PM ChST by NWS Tiyan GU",
  "eventType": "Typhoon Watch",
  "occurredAt": "2026-10-15T04:42:00.000Z",
  "issuedAt": "2026-10-15T04:42:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T04:42:00.000Z",
  "onsetAt": "2026-10-15T04:42:00.000Z",
  "expiresAt": "2026-10-15T12:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Future",
  "certainty": "Possible",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Guam; Rota; Tinian; Saipan",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Typhoon Watch · Guam; Rota; Tinian; Saipan. Severe; possible; urgency: future.",
  "description": "...A TYPHOON WATCH IS NOW IN EFFECT FOR THE MARIANAS...\n\n.NEW INFORMATION...\nA Typhoon Watch has now been issued for Guam, Rota, Tinian and\nSaipan in the Mariana Islands.\n\n.AREAS AFFECTED...\nThis local statement provides important information and\nrecommended actions for people in Guam and the Northern Marianas.\n\n.Watches/Warnings...\nA Typhoon watch is in effect for Guam, Rota, Tinian, and Saipan in\nthe Mariana Islands.\n\nA Typhoon Watch means that Typhoon conditions, including winds of 74\nmph or greater, are possible within the next 48 hours somewhere\nwithin the specified areas.\n\nAll persons in the watch areas should review their preparedness\nplan and begin to take actions to prepare for conditions as\nindicated by your local forecast and additional details.\n\n.STORM INFORMATION...\nAt 1 PM ChST...the center of Tropical Depression 29W was located\nnear latitude 10.8N...longitude 158.9E. This was about 970 miles\neast of Guam. Storm motion was west-northwest, 285 degrees, at\n13 mph. 29W is expected to make a turn toward the west over the next\ncouple of days. Storm intensity was 35 mph. 29W is expected to begin\nto intensify Friday.\n\n.SITUATION OVERVIEW...\nA Typhoon Watch has now been issued. A more detailed statement will\nfollow shortly.",
  "instruction": ".\n\nFor those under a watch, now is the time to initiate preparations\naccording to your typhoon disaster plan specific to your home or\nbusiness.\n\nFor those nearby, review your typhoon disaster plan and become ready\nto act if a watch or a warning is later issued for your area.\n\nIt is important to actively listen for forthcoming information\nfrom your local National Weather Service office and emergency\nmanagement agency.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.36bad8ed1f75073d95089ccf80fa9e38379ebf01.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}