Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
572 FZMY50 PGUM 190658 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 458 PM ChST Fri Jul 19 2024 Marianas Waters out to 40 nautical miles PMZ150-192200- 458 PM ChST Fri Jul 19 2024 .Synopsis for Marianas Waters...The monsoon trough is pulling northward, but most of the showers and thunderstorms are currently developing west and south the coastal waters of the Marianas. Next main potential for scattered showers and isolated thundestorms is expected Sunday when a trade-wind trough, currently well east of the Marianas, is expected to move into the Marianas. Combined seas of 4 to 7 feet are expected, with a weak secondary southwest swell through at least Monday. $$ PMZ151>154-192200- MARIANAS COASTAL WATERS- 458 PM ChST Fri Jul 19 2024 .TONIGHT...Southeast wind 10 to 15 kt. Wind waves 2 to 3 ft. East swell 4 to 5 ft and southwest swell 2 ft. Scattered showers and isolated thunderstorms mainly for southern Guam waters. .SATURDAY AND SATURDAY NIGHT...East wind 10 to 15 kt. Wind waves 2 to 3 ft. East swell 4 to 5 ft and southwest swell 2 ft. .SUNDAY AND SUNDAY NIGHT...East wind 10 to 15 kt. Wind waves 2 to 3 ft. East swell 4 ft and southwest swell 2 to 3 ft. Scattered showers and isolated thunderstorms. .MONDAY...East wind 5 to 10 kt. Wind waves 2 ft or less. East swell 3 to 5 ft and southwest swell 2 ft. Chance of showers and slight chance of thunderstorms. .TUESDAY AND WEDNESDAY...East wind 10 kt. Wind waves 2 ft or less. East swell 3 to 4 ft. Chance of showers and slight chance of thunderstorms. $$