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Warning

Special Marine Warning

Guam Coastal Waters

Ended Oct 18, 6:45 PM

Waterspout observedMoving north northwest at 33 mph
25 MI
20 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, 6:26 PM
Until
Oct 18, 6:45 PM
Issued
Oct 18, 6:26 PM
Office
Tiyan, GU
Number
28 of its kind from this office this year
Severity
Severe
Storm motion
Moving north northwest at 33 mph
Where
Marianas waters

THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A

Special marine warning for
SOUTHEASTERN GUAM COASTAL WATERS...

* UNTIL 645 PM CHST.

* AT 626 PM CHST, A SEVERE THUNDERSTORM PRODUCING WATERSPOUTS WAS LOCATED 30 NM SOUTHEAST OF IPAN BUOY, MOVING NORTH AT 30 KNOTS.

Hazard
WATERSPOUTS.
Source
RADAR INDICATED.
Impact
WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS.
Locations impacted include
MAINLY OPEN WATERS OF GUAM COASTAL WATERS.

What to do

MOVE TO SAFE HARBOR UNTIL HAZARDOUS WEATHER PASSES.

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