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Warning

Special Marine Warning

Guam Coastal Waters

Ended Oct 18, 6:45 PM

Waterspout possibleMoving north at 32 mph
20 MI
10 MI
Map of the Special Marine Warning over Guam Coastal Waters, with the area it draws around the storm. Drawn on the national sheet; the scale is at its foot.
In force from
Oct 18, 6:28 PM
Until
Oct 18, 6:45 PM
Issued
Oct 18, 6:28 PM
Office
Tiyan, GU
Number
29 of its kind from this office this year
Severity
Severe
Storm motion
Moving north at 32 mph
Where
Marianas waters

THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A

Special marine warning for
GUAM COASTAL WATERS...

* UNTIL 645 PM CHST.

* AT 626 PM CHST...A SHOWER CAPABLE OF PRODUCING WATERSPOUTS WAS LOCATED OVER SOUTHERN GUAM WATERS OF MOVING NORTH AT 30 KNOTS.

Hazard
WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER.
Source
RADAR.
Impact
WATERSPOUTS CAN CREATE LOCALLY HAZARDOUS SEAS. SMALL

CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND

SUDDENLY HIGHER WAVES.

* THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS.

What to do

WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY.

Read the platesWaterspout FB-EVT-012How to read a warning FB-STN-001

On the radarForecast gusts over itRadar

Also in force nearby

Every warning of October 18, 2026Every severe alert in force