NWS Tiyan GUMA.W 0025September 19, 2026
Special Marine Warning: Guam Coastal Waters
The National Weather Service office in Tiyan issued a special marine warning for Guam Coastal Waters, which was in force until 9:45 p.m. local time on September 19. It was the 25th special marine warning the NWS office in Tiyan issued in 2026.
ExpiredWarning
In force for 33 minutes; 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
- Level
- Warning
- Issued
- 9:12 p.m. UTC+10, September 19, 2026
- Expires
- 9:45 p.m. UTC+10, September 19, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- PGUM MA.W 0025
- Official source
- National Weather Service: the notice at its source
NWS notices, September 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
SMWGUM THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 945 PM CHST. * AT 911 PM CHST...STRONG THUNDERSTORMS WERE LOCATED OVER THE WEST COAST OF GUAM...MOVING EAST AT 10 KNOTS. HAZARD...WIND GUSTS 34 KNOTS OR GREATER. FREQUENT LIGHTNING SOURCE...RADAR. IMPACT...SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * STRONG THUNDERSTORMS WILL REMAIN OVER MAINLY OPEN WATERS.
What the agency told people to do
FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED METAL OBJECTS.
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.