Severe · Special Marine WarningThis alert has expired. It is kept for reference.

Special Marine Warning issued October 19 at 10:40AM ChST until October 19

Affecting Guam Coastal Waters; Rota Coastal Waters

In effect until: Oct 19, 2026, 1:15 AM

Guam Coastal Waters; Rota Coastal Waters

Likely impact; effects through 1:15 AM.

MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE EXPECTED. FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED METAL OBJECTS.

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SMWGUM

THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
ROTA COASTAL WATERS...

* UNTIL 1115 AM CHST.

* AT 1040 AM CHST...SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
WATERSPOUTS WERE LOCATED OVER SOUTHERN ROTA WATERS...MOVING NORTH
AT 35 KNOTS.

HAZARD...WIND GUSTS TO NEARLY 50 KNOTS. FREQUENT LIGHTNING.
WATERSPOUTS POSSIBLE.

SOURCE...RADAR.

IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY
HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY
HIGHER WINDS AND SUDDENLY HIGHER WAVES.

* SEVERE THUNDERSTORMS WILL REMAIN OVER MAINLY OPEN WATERS.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Special Marine Warning issued October 19 at 10:40AM ChST until October 19

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