289
WHGM70 PGUM 210240 CCA
MWWGUM
URGENT - MARINE WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE TIYAN GU
1240 PM CHST FRI NOV 21 2025
PMZ151>154-210800-
/O.COR.PGUM.SC.Y.0052.000000T0000Z-251122T0800Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-
SAIPAN COASTAL WATERS-
1240 PM CHST FRI NOV 21 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM FRIDAY TO 6 PM
CHST SATURDAY...
* WHAT...EAST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND SEAS 7 TO
10 FEET EXPECTED.
* WHERE...MARIANAS COASTAL WATERS.
* WHEN...FROM 6 AM FRIDAY TO 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 CONDITIONS
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.
DOLL
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