NWS Tiyan GUSE.W 0007October 3, 2026
Hazardous Seas Warning: Guam Coastal Waters and Rota Coastal Waters
The National Weather Service office in Tiyan issued a hazardous seas warning for Guam Coastal Waters and Rota Coastal Waters, which was in force until 5:00 a.m. local time on October 4. It was the 7th hazardous seas warning the NWS office in Tiyan issued in 2026.
ExpiredWarning
In force for 7.8 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Tiyan GU
- Area
- Guam Coastal Waters and Rota Coastal Waters
- Level
- Warning
- Issued
- 9:13 p.m. UTC+10, October 3, 2026
- Expires
- 5:00 a.m. UTC+10, October 4, 2026
- CAP severity, certainty, urgency
- Moderate, Likely, Expected
- VTEC event
- PGUM SE.W 0007
- Official source
- National Weather Service: the notice at its source
NWS notices, October 2026The latest from the National Weather Service
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
* WHAT...Very steep and hazardous seas 12 to 16 feet and southwest winds 20 to 30 kt with occasional gusts up to 40 kt. * WHERE...Guam and Rota Coastal Waters. * WHEN...Until 5 AM ChST Sunday. * IMPACTS...Very steep and hazardous seas could capsize or cause damage to vessels. * ADDITIONAL DETAILS...Hazardous sea conditions are expected to continue over the coastal waters through early Sunday morning as a strong monsoon surge continues well south of Typhoon Choi-wan (26W). This Warning will later be replaced by a Small Craft Advisory as combined seas gradually diminish below 15 feet.
What the agency told people to do
A hazardous seas warning means hazardous sea conditions are imminent or occurring. Recreational boaters should remain in port...or take shelter until waves subside. Commercial vessels should prepare for rough seas and consider remaining in port or taking shelter in port until hazardous seas subside.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.