NOAA NWS / Event history

Tropical Storm Warning issued October 16 at 4:51PM ChST by NWS Tiyan GU

Tropical Storm Warning · Tinian Coastal Waters; Saipan Coastal Waters. Severe; likely; urgency: immediate.

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Bulletin issued: 16 October 2026 at 06:51 UTC
First saved by us: 16 October 2026 at 07:02 UTC
Last included in a daily record: 16 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 alert

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 Tiyan GU · Tinian Coastal Waters; Saipan Coastal Waters
Certainty / urgency: Likely / Immediate
Message expiry (not hazard end): 16 October 2026 at 21:00 UTC
Forecast onset / end: 16 October 2026 at 06:51 UTC / Not supplied

Archived official description

* WHAT...Tropical storm conditions, including winds of 34 to 63 knots, are expected. Typhoon conditions, including winds of 64 knots or more are possible within the next 48 hours. * WHERE...Tinian and Saipan Coastal Waters. * WHEN...Onset of damaging winds beginning Saturday night, continuing into at least Sunday night, possibly longer if conditions warrant. * IMPACTS...Destructive winds will produce dangerous seas that could damage, capsize or sink vessels, along with drastically reducing visibilities in heavy rain. * ADDITIONAL DETAILS...Tropical Storm Champi (29W) continues to move quickly toward the Marianas. The exact path of 29W remains subject to change. However, guidance supports a passage through Guam coastal waters, with damaging winds moving into Tinian and Saipan Saturday night and lasting into at least Sunday night. Champi is expected to strengthen further today and Saturday as it approaches, then move through the region as a typhoon Sunday morning. Seas will quickly rise, with significant sea heights reaching as high as 25 feet during closest passage of Champi. Dangerous sea conditions may continue into Monday.

Instructions in this archived message

Prepare for tropical storm force conditions Sunday morning. Secure all vessels. Conditions are expected to be catastrophic for small craft, and extremely dangerous for any vessels of larger size. As Tropical Storm Champi approaches the Marianas, stay in safe harbor.

The saved record

What changed

0 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.

First saved record · 16 October 2026 at 07:02 UTC

Saved by us

16 October 2026 at 07:02 UTC

Starting point

First saved record

Our first saved version of Tropical Storm Warning issued October 16 at 4:51PM ChST by NWS Tiyan GU. We have no earlier saved version to compare.

Bulletin issued: 16 October 2026 at 06:51 UTC

View saved version 1

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

{
  "id": "nws:7d1d4278fdd9f0aba7f2d41d",
  "authorityId": "urn:oid:2.49.0.1.840.0.b97b0d01856d55ff43e9b9c195116bedd6cb2b0e.002.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Tropical Storm Warning issued October 16 at 4:51PM ChST by NWS Tiyan GU",
  "eventType": "Tropical Storm Warning",
  "occurredAt": "2026-10-16T06:51:00.000Z",
  "issuedAt": "2026-10-16T06:51:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T06:51:00.000Z",
  "onsetAt": "2026-10-16T06:51:00.000Z",
  "expiresAt": "2026-10-16T21:00:00.000Z",
  "forecastEndAt": null,
  "severity": "Severe",
  "urgency": "Immediate",
  "certainty": "Likely",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Tinian Coastal Waters; Saipan Coastal Waters",
  "coordinates": null,
  "issuer": "NWS Tiyan GU",
  "summary": "Tropical Storm Warning · Tinian Coastal Waters; Saipan Coastal Waters. Severe; likely; urgency: immediate.",
  "description": "* WHAT...Tropical storm conditions, including winds of 34 to 63\nknots, are expected. Typhoon conditions, including winds of 64\nknots or more are possible within the next 48 hours.\n\n* WHERE...Tinian and Saipan Coastal Waters.\n\n* WHEN...Onset of damaging winds beginning Saturday night,\ncontinuing into at least Sunday night, possibly longer if\nconditions warrant.\n\n* IMPACTS...Destructive winds will produce dangerous seas that\ncould damage, capsize or sink vessels, along with drastically\nreducing visibilities in heavy rain.\n\n* ADDITIONAL DETAILS...Tropical Storm Champi (29W) continues to\nmove quickly toward the Marianas. The exact path of 29W remains\nsubject to change. However, guidance supports a passage through\nGuam coastal waters, with damaging winds moving into Tinian and\nSaipan Saturday night and lasting into at least Sunday night.\nChampi is expected to strengthen further today and Saturday as\nit approaches, then move through the region as a typhoon Sunday\nmorning. Seas will quickly rise, with significant sea heights\nreaching as high as 25 feet during closest passage of Champi.\nDangerous sea conditions may continue into Monday.",
  "instruction": "Prepare for tropical storm\nforce conditions Sunday morning. Secure all vessels. Conditions\nare expected to be catastrophic for small craft, and extremely\ndangerous for any vessels of larger size. As Tropical Storm Champi\napproaches the Marianas, stay in safe harbor.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b97b0d01856d55ff43e9b9c195116bedd6cb2b0e.002.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

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