NWS Tiyan GUSE.A 0002October 2, 2026
Hazardous Seas Watch: Guam Coastal Waters and Rota Coastal Waters
The National Weather Service office in Tiyan issued a hazardous seas watch for Guam Coastal Waters and Rota Coastal Waters, which was in force until 5:00 p.m. local time on October 4. It was the 2nd hazardous seas watch the NWS office in Tiyan issued in 2026.
ExpiredWatch
In force for 24 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
- Watch
- Issued
- 2:57 a.m. UTC+10, October 2, 2026
- In force from
- 5:00 p.m. UTC+10, October 3, 2026
- Expires
- 5:00 p.m. UTC+10, October 4, 2026
- CAP severity, certainty, urgency
- Moderate, Possible, Future
- VTEC event
- PGUM SE.A 0002
- 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...For the Gale Warning, southwest winds 25 to 35 kt with frequent gusts up to 45 kt and seas 12 to 17 feet expected. For the Small Craft Advisory, west winds 25 to 30 kt with gusts up to 40 kt and seas 12 to 14 feet. For the Hazardous Seas Watch, very steep and hazardous seas 12 to 16 feet possible. * WHERE...Guam Coastal Waters and Rota Coastal Waters. * WHEN...For the Gale Warning, from 5 AM Friday to 5 PM ChST Saturday. For the Small Craft Advisory, until 5 AM ChST Friday. For the Hazardous Seas Watch, from Saturday afternoon through Sunday afternoon. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. * ADDITIONAL DETAILS...Combined seas of 9 to 12 feet will rapidly increase today, peaking to around 17 ft over the weekend. West to southwest winds will be strong to gale-force.
What the agency told people to do
Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions.
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.