755
WHGM70 PGUM 210635
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
435 PM CHST FRI NOV 21 2025
PMZ151>154-212045-
/O.CON.PGUM.SC.Y.0052.000000T0000Z-251122T0800Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-
SAIPAN COASTAL WATERS-
435 PM CHST FRI NOV 21 2025
..SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CHST SATURDAY
* WHAT...EAST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND SEAS
7 TO 10 FEET.
* WHERE...MARIANAS COASTAL WATERS.
* WHEN...UNTIL 6 PM CHST SATURDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...A COMBINATION OF ELEVATED EASTERLY SWELL,
SECONDARY NORTHERLY SWELL AND MUCH HIGHER LOCALIZED WIND WAVES,
ARE PRODUCING SEA CONDITIONS HAZARDOUS TO SMALL CRAFT LASTING
THROUGH AT LEAST SATURDAY AFTERNOON. ONCE THE PRESSURE GRADIENT
BETWEEN THE TROPICS AND THE MID-LATITUDES DECREASES, WIND WAVES
AND EASTERLY SWELL WILL BEGIN TO DIMINISH, ALLOWING SEAS TO FALL
BELOW 10 FEET BY EARLY NEXT WEEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
STANKO
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