Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
499 FZMY50 PGUM 230550 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 350 PM ChST Sun Feb 23 2025 Marianas Waters out to 40 nautical miles PMZ150-232145- 350 PM ChST Sun Feb 23 2025 .Synopsis for Marianas Waters...A Small Craft Advisory remains in effect through early Monday morning, with combined seas of 7 to 10 feet expected tonight. Fresh to strong winds will diminish overnight, becoming moderate to fresh Monday through Monday night with a temporary relaxation in the pressure gradient. Northerly swell will weaken in the meanwhile. By Tuesday night, trade winds will begin to surge again, and a Small Craft Advisory will likely need to be re-issued. Stronger trade swells will arrive as the next major northerly swell moves into the region by around midweek, but this will be preceded by surging trade winds that will likely bring seas hazardous to small craft. $$ PMZ151>154-232145- MARIANAS COASTAL WATERS- 350 PM ChST Sun Feb 23 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY MONDAY MORNING... .TONIGHT...Northeast wind 15 to 25 kt with gusts to 30 kt. Seas 7 to 10 ft. Wave Detail: Northeast 7 ft at 9 seconds, northeast 6 ft at 7 seconds and north 4 ft at 12 seconds. .MONDAY...Northeast wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail: Northeast 7 ft at 8 seconds, northeast 4 ft at 6 seconds and north 3 ft at 12 seconds. .MONDAY NIGHT...Northeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail: Northeast 6 ft at 9 seconds, northeast 4 ft at 6 seconds and north 3 ft at 11 seconds. .TUESDAY...Northeast wind 20 kt with gusts to 30 kt. Seas 6 to 8 ft. Wave Detail: Northeast 5 ft at 7 seconds, northeast 5 ft at 9 seconds and north 3 ft at 12 seconds. .TUESDAY NIGHT...Northeast wind 20 to 25 kt. Seas 8 to 9 ft. Wave Detail: Northeast 6 ft at 7 seconds, northeast 6 ft at 9 seconds and north 3 ft at 11 seconds. .WEDNESDAY THROUGH FRIDAY...Northeast wind 20 to 25 kt. Seas 9 to 11 ft. Wave Detail: North 8 ft at 9 seconds, northeast 6 ft at 7 seconds and north 5 ft at 11 seconds. $$