NOAA NWS / Event history

Severe Thunderstorm Warning issued October 21 at 3:34PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ

Severe Thunderstorm Warning · Maricopa, AZ. Severe; observed; urgency: immediate.

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Bulletin issued: 21 October 2026 at 22:34 UTC
First saved by us: 21 October 2026 at 22:10 UTC
Last included in a daily record: 21 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source update

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS Phoenix AZ · Maricopa, AZ
Certainty / urgency: Observed / Immediate
Message expiry (not hazard end): 21 October 2026 at 22:45 UTC
Forecast onset / end: 21 October 2026 at 22:34 UTC / 21 October 2026 at 22:45 UTC

Archived official description

At 334 PM MST, a severe thunderstorm was located over Metro Center, or near Phoenix, moving northeast at 40 mph. THIS IS A DESTRUCTIVE STORM FOR CENTRAL PORTIONS OF PHOENIX. HAZARD...Baseball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be severely injured. Expect shattered windows, extensive damage to roofs, siding, and vehicles. Locations impacted include... Phoenix, Glendale, Sun City, Deer Valley Airport, North Mountain Park, Metro Center, Piestewa Peak Park, Desert Ridge Marketplace, Arrowhead Mall, Downtown Glendale and Downtown Peoria. This includes the following highways... AZ Route 101 between mile markers 10 and 15...and between mile markers 17 and 18...and near mile marker 19. US Highway 60 between mile markers 149 and 158. AZ Interstate 17 between mile markers 203 and 212. AZ Route 51 between mile markers 10 and 15...and between mile markers 3 and 6. AZ Interstate 10 near mile marker 146. AZ Route 303 between mile markers 138 and 139.

Instructions in this archived message

Seek shelter now inside an interior room on the lowest floor of a well-built structure. This storm is capable of producing destructive hail and damaging winds.

The saved record

What changed

2 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

Showing 2 changes

Saved by us
21 October 2026 at 22:40 UTC
Version 3
7 recorded details changed
Title
Before
Severe Thunderstorm Warning issued October 21 at 3:18PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ
After
Severe Thunderstorm Warning issued October 21 at 3:34PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ
Source updated
Before
21 October 2026 at 22:18 UTC
After
21 October 2026 at 22:34 UTC
Effective from
Before
21 October 2026 at 22:18 UTC
After
21 October 2026 at 22:34 UTC
Forecast onset
Before
21 October 2026 at 22:18 UTC
After
21 October 2026 at 22:34 UTC
Official description
Before
At 318 PM MST, a severe thunderstorm was located over Tolleson, moving northeast at 35 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. Locations impacted include... Phoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, El Mirage, Tolleson, Youngtown, Sun City, Waddell, Sun City West, Cashion, Laveen, New River, Litchfield Park and Downtown Peoria. This includes the following highways... AZ Route 101 between mile markers 10 and 17...and near mile marker 18. US Highway 60 between mile markers 139 and 148. AZ Route 74 between mile markers 16 and 25. AZ Interstate 17 between mile markers 197 and 206. AZ Route 51 between mile markers 10 and 15...and between mile markers 2 and 5. AZ Interstate 10 between mile markers 123 and 132. AZ Route 303 between mile markers 105 and 114.
After
At 334 PM MST, a severe thunderstorm was located over Metro Center, or near Phoenix, moving northeast at 40 mph. THIS IS A DESTRUCTIVE STORM FOR CENTRAL PORTIONS OF PHOENIX. HAZARD...Baseball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be severely injured. Expect shattered windows, extensive damage to roofs, siding, and vehicles. Locations impacted include... Phoenix, Glendale, Sun City, Deer Valley Airport, North Mountain Park, Metro Center, Piestewa Peak Park, Desert Ridge Marketplace, Arrowhead Mall, Downtown Glendale and Downtown Peoria. This includes the following highways... AZ Route 101 between mile markers 10 and 15...and between mile markers 17 and 18...and near mile marker 19. US Highway 60 between mile markers 149 and 158. AZ Interstate 17 between mile markers 203 and 212. AZ Route 51 between mile markers 10 and 15...and between mile markers 3 and 6. AZ Interstate 10 near mile marker 146. AZ Route 303 between mile markers 138 and 139.
Official instructions
Before
Seek shelter ~~inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail.~~
After
Seek shelter now inside an interior room on the lowest floor of a well-built structure. This storm is capable of producing destructive hail and damaging winds.
External source link
Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.61c610bb331196d9808eb1a0e37f6b057242fada.002.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d9e9488a145099147e5561a7a721e507715fa1c1.001.1
Bulletin issued: 21 October 2026 at 22:34 UTC
View saved version 3
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:a919907072037bb991ad5a8e", "authorityId": "urn:oid:2.49.0.1.840.0.d9e9488a145099147e5561a7a721e507715fa1c1.001.1", "sender": "w-nws.webmaster@noaa.gov", "references": [ { "identifier": "urn:oid:2.49.0.1.840.0.2d4d80ba455fd62f3e0f600de52c6b241f6c4762.001.1", "sender": "w-nws.webmaster@noaa.gov" }, { "identifier": "urn:oid:2.49.0.1.840.0.61c610bb331196d9808eb1a0e37f6b057242fada.002.1", "sender": "w-nws.webmaster@noaa.gov" }, { "identifier": "urn:oid:2.49.0.1.840.0.28342cd6730a275528735d9d4313be2efb8e97da.001.1", "sender": "w-nws.webmaster@noaa.gov" } ], "category": "weather", "title": "Severe Thunderstorm Warning issued October 21 at 3:34PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ", "eventType": "Severe Thunderstorm Warning", "occurredAt": "2026-10-21T22:34:00.000Z", "issuedAt": "2026-10-21T22:34:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-21T22:34:00.000Z", "onsetAt": "2026-10-21T22:34:00.000Z", "expiresAt": "2026-10-21T22:45:00.000Z", "forecastEndAt": "2026-10-21T22:45:00.000Z", "severity": "Severe", "urgency": "Immediate", "certainty": "Observed", "messageType": "Update", "status": "Source update", "place": "Maricopa, AZ", "coordinates": null, "issuer": "NWS Phoenix AZ", "summary": "Severe Thunderstorm Warning · Maricopa, AZ. Severe; observed; urgency: immediate.", "description": "At 334 PM MST, a severe thunderstorm was located over Metro Center,\nor near Phoenix, moving northeast at 40 mph.\n\nTHIS IS A DESTRUCTIVE STORM FOR CENTRAL PORTIONS OF PHOENIX.\n\nHAZARD...Baseball size hail and 60 mph wind gusts.\n\nSOURCE...Radar indicated.\n\nIMPACT...People and animals outdoors will be severely injured. Expect\nshattered windows, extensive damage to roofs, siding, and\nvehicles.\n\nLocations impacted include...\nPhoenix, Glendale, Sun City, Deer Valley Airport, North Mountain\nPark, Metro Center, Piestewa Peak Park, Desert Ridge Marketplace,\nArrowhead Mall, Downtown Glendale and Downtown Peoria.\n\nThis includes the following highways...\nAZ Route 101 between mile markers 10 and 15...and between mile\nmarkers 17 and 18...and near mile marker 19. US Highway 60 between\nmile markers 149 and 158. AZ Interstate 17 between mile markers 203\nand 212. AZ Route 51 between mile markers 10 and 15...and between\nmile markers 3 and 6. AZ Interstate 10 near mile marker 146. AZ Route\n303 between mile markers 138 and 139.", "instruction": "Seek shelter now inside an interior room on the lowest floor of a\nwell-built structure. This storm is capable of producing destructive\nhail and damaging winds.", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d9e9488a145099147e5561a7a721e507715fa1c1.001.1", "source": "nws", "sourceName": "NOAA NWS" }
Visit the external source ↗
The external page may have changed since this version was saved.
Saved by us
21 October 2026 at 22:25 UTC
Version 2
Source status changed
Title
Before
Severe Thunderstorm Warning issued October 21 at 3:04PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ
After
Severe Thunderstorm Warning issued October 21 at 3:18PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ
Source updated
Before
21 October 2026 at 22:04 UTC
After
21 October 2026 at 22:18 UTC
Effective from
Before
21 October 2026 at 22:04 UTC
After
21 October 2026 at 22:18 UTC
Forecast onset
Before
21 October 2026 at 22:04 UTC
After
21 October 2026 at 22:18 UTC
Message type
Before
Alert
After
Update
Source status
Before
Source alert
After
Source update
Reported area
Before
Maricopa, AZ; Pinal, AZ
After
Maricopa, AZ
Source summary
Before
Severe Thunderstorm Warning · Maricopa, ~~AZ; Pinal,~~ AZ. Severe; observed; urgency: immediate.
After
Severe Thunderstorm Warning · Maricopa, AZ. Severe; observed; urgency: immediate.
Official description
Before
SVRPSR The National Weather Service in Phoenix has issued a * Severe Thunderstorm Warning for... Maricopa County in south central Arizona... Pinal County in southeastern Arizona... * Until 345 PM MST. * At 304 PM MST, a severe thunderstorm was located over Phoenix International Raceway, or over Avondale, moving north at 45 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Phoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, El Mirage, Paradise Valley, Tolleson, Youngtown, Sun City, Waddell, Cashion, Laveen, Sun City West, New River, Litchfield Park and Downtown Peoria. This includes the following highways... AZ Route 101 between mile markers 10 and 17...and near mile marker 18. US Highway 60 between mile markers 139 and 148. AZ Route 74 between mile markers 16 and 25. AZ Interstate 17 between mile markers 196 and 205. AZ Route 51 near mile marker 1...and between mile markers 10 and 15...and between mile markers 2 and 4. AZ Interstate 10 between mile markers 123 and 132. AZ Route 303 between mile markers 105 and 114.
After
At 318 PM MST, a severe thunderstorm was located over Tolleson, moving northeast at 35 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. Locations impacted include... Phoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, El Mirage, Tolleson, Youngtown, Sun City, Waddell, Sun City West, Cashion, Laveen, New River, Litchfield Park and Downtown Peoria. This includes the following highways... AZ Route 101 between mile markers 10 and 17...and near mile marker 18. US Highway 60 between mile markers 139 and 148. AZ Route 74 between mile markers 16 and 25. AZ Interstate 17 between mile markers 197 and 206. AZ Route 51 between mile markers 10 and 15...and between mile markers 2 and 5. AZ Interstate 10 between mile markers 123 and 132. AZ Route 303 between mile markers 105 and 114.
External source link
Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2d4d80ba455fd62f3e0f600de52c6b241f6c4762.001.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.61c610bb331196d9808eb1a0e37f6b057242fada.002.1
Bulletin issued: 21 October 2026 at 22:18 UTC
View saved version 2
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:3cf72452b3469d95fde163f9", "authorityId": "urn:oid:2.49.0.1.840.0.61c610bb331196d9808eb1a0e37f6b057242fada.002.1", "sender": "w-nws.webmaster@noaa.gov", "references": [ { "identifier": "urn:oid:2.49.0.1.840.0.2d4d80ba455fd62f3e0f600de52c6b241f6c4762.001.1", "sender": "w-nws.webmaster@noaa.gov" } ], "category": "weather", "title": "Severe Thunderstorm Warning issued October 21 at 3:18PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ", "eventType": "Severe Thunderstorm Warning", "occurredAt": "2026-10-21T22:18:00.000Z", "issuedAt": "2026-10-21T22:18:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-21T22:18:00.000Z", "onsetAt": "2026-10-21T22:18:00.000Z", "expiresAt": "2026-10-21T22:45:00.000Z", "forecastEndAt": "2026-10-21T22:45:00.000Z", "severity": "Severe", "urgency": "Immediate", "certainty": "Observed", "messageType": "Update", "status": "Source update", "place": "Maricopa, AZ", "coordinates": null, "issuer": "NWS Phoenix AZ", "summary": "Severe Thunderstorm Warning · Maricopa, AZ. Severe; observed; urgency: immediate.", "description": "At 318 PM MST, a severe thunderstorm was located over Tolleson,\nmoving northeast at 35 mph.\n\nHAZARD...Ping pong ball size hail and 60 mph wind gusts.\n\nSOURCE...Radar indicated.\n\nIMPACT...People and animals outdoors will be injured. Expect hail\ndamage to roofs, siding, windows, and vehicles. Expect wind\ndamage to roofs, siding, and trees.\n\nLocations impacted include...\nPhoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, El Mirage,\nTolleson, Youngtown, Sun City, Waddell, Sun City West, Cashion,\nLaveen, New River, Litchfield Park and Downtown Peoria.\n\nThis includes the following highways...\nAZ Route 101 between mile markers 10 and 17...and near mile marker\n18. US Highway 60 between mile markers 139 and 148. AZ Route 74\nbetween mile markers 16 and 25. AZ Interstate 17 between mile markers\n197 and 206. AZ Route 51 between mile markers 10 and 15...and between\nmile markers 2 and 5. AZ Interstate 10 between mile markers 123 and\n132. AZ Route 303 between mile markers 105 and 114.", "instruction": "Seek shelter inside a well-built structure and stay away from\nwindows. This storm is capable of producing damaging winds and large\nhail.", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.61c610bb331196d9808eb1a0e37f6b057242fada.002.1", "source": "nws", "sourceName": "NOAA NWS" }
Visit the external source ↗
The external page may have changed since this version was saved.

First saved record · 21 October 2026 at 22:10 UTC

Saved by us

21 October 2026 at 22:10 UTC

Starting point

First saved record

Our first saved version of Severe Thunderstorm Warning issued October 21 at 3:04PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ. We have no earlier saved version to compare.

Bulletin issued: 21 October 2026 at 22:04 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:8fe73df1c2eba697085c9ffa",
  "authorityId": "urn:oid:2.49.0.1.840.0.2d4d80ba455fd62f3e0f600de52c6b241f6c4762.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Severe Thunderstorm Warning issued October 21 at 3:04PM MST until October 21 at 3:45PM MST by NWS Phoenix AZ",
  "eventType": "Severe Thunderstorm Warning",
  "occurredAt": "2026-10-21T22:04:00.000Z",
  "issuedAt": "2026-10-21T22:04:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-21T22:04:00.000Z",
  "onsetAt": "2026-10-21T22:04:00.000Z",
  "expiresAt": "2026-10-21T22:45:00.000Z",
  "forecastEndAt": "2026-10-21T22:45:00.000Z",
  "severity": "Severe",
  "urgency": "Immediate",
  "certainty": "Observed",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Maricopa, AZ; Pinal, AZ",
  "coordinates": null,
  "issuer": "NWS Phoenix AZ",
  "summary": "Severe Thunderstorm Warning · Maricopa, AZ; Pinal, AZ. Severe; observed; urgency: immediate.",
  "description": "SVRPSR\n\nThe National Weather Service in Phoenix has issued a\n\n* Severe Thunderstorm Warning for...\nMaricopa County in south central Arizona...\nPinal County in southeastern Arizona...\n\n* Until 345 PM MST.\n\n* At 304 PM MST, a severe thunderstorm was located over Phoenix\nInternational Raceway, or over Avondale, moving north at 45 mph.\n\nHAZARD...60 mph wind gusts and quarter size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Hail damage to vehicles is expected. Expect wind damage to\nroofs, siding, and trees.\n\n* Locations impacted include...\nPhoenix, Glendale, Peoria, Surprise, Avondale, Goodyear, El Mirage,\nParadise Valley, Tolleson, Youngtown, Sun City, Waddell, Cashion,\nLaveen, Sun City West, New River, Litchfield Park and Downtown\nPeoria.\n\nThis includes the following highways...\nAZ Route 101 between mile markers 10 and 17...and near mile marker\n18. US Highway 60 between mile markers 139 and 148. AZ Route 74\nbetween mile markers 16 and 25. AZ Interstate 17 between mile markers\n196 and 205. AZ Route 51 near mile marker 1...and between mile\nmarkers 10 and 15...and between mile markers 2 and 4. AZ Interstate\n10 between mile markers 123 and 132. AZ Route 303 between mile\nmarkers 105 and 114.",
  "instruction": "Seek shelter inside a well-built structure and stay away from\nwindows. This storm is capable of producing damaging winds and large\nhail.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2d4d80ba455fd62f3e0f600de52c6b241f6c4762.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.