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Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
821 FZMY50 PGUM 191817 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 417 AM ChST Sat Jul 20 2024 Marianas Waters out to 40 nautical miles PMZ150-200800- 417 AM ChST Sat Jul 20 2024 .Synopsis for Marianas Waters...A Tropical Depression is forming far to the west of Guam, and the moist southeast flow over the Marianas is weakening. Otherwise, the next threat for scattered showers and isolated thundestorms is for Sunday when a trade-wind trough, currently north of Chuuk, moves into the Marianas. Combined seas of 4 to 7 feet are expected in the coming days, along with a secondary southwest swell. $$ PMZ151>154-200800- MARIANAS COASTAL WATERS- 417 AM ChST Sat Jul 20 2024 .TODAY...Southeast to east wind 10 to 15 kt. Wind waves 2 to 3 ft. East swell 4 to 5 ft. .TONIGHT...East wind 10 to 15 kt. Wind waves 2 to 3 ft. Mixed swell east 4 to 5 ft and southwest swell 2 ft. .SUNDAY AND SUNDAY NIGHT...East wind 10 to 15 kt. Wind waves 2 to 3 ft. East swell 4 ft and southwest swell 2 to 3 ft. Scattered showers and isolated thunderstorms. .MONDAY...East wind 5 to 10 kt. Wind waves 2 ft or less. East swell 3 to 5 ft and southwest swell 2 ft. Chance of showers and slight chance of thunderstorms. .TUESDAY AND WEDNESDAY...East wind 10 kt. Wind waves 2 ft or less. East swell 3 to 4 ft. Chance of showers and slight chance of thunderstorms. $$ Simpson