Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
700 FZMY50 PGUM 180541 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 341 PM ChST Fri Oct 18 2024 Marianas Waters out to 40 nautical miles PMZ150-182130- 341 PM ChST Fri Oct 18 2024 .Synopsis for Marianas Waters...Combined seas 5 to 8 feet through at least Monday as winds become moderate to fresh at times and slowly turn to the south and southwest as a monsoon trough develops. Gusty winds and choppy seas expected near heavy showers and thunderstorms. Winds and seas could be higher at times for the CNMI, so a small craft advisory is out for Tinian and Saipan through tonight. Winds and seas look to remain elevated next week as another tropical disturbance and/or monsoon surge impacts the region. $$ PMZ151-152-182130- Guam Coastal Waters-Rota Coastal Waters- 341 PM ChST Fri Oct 18 2024 .TONIGHT...East wind 5 to 15 kt. Wind waves 1 to 3 ft. Northeast swell 4 to 6 ft. Scattered showers becoming numerous locally heavy showers near midnight. Isolated thunderstorms. .SATURDAY AND SATURDAY NIGHT...Southeast to south wind 5 to 10 kt. Wind waves 2 ft or less. Northeast swell 4 to 6 ft. Numerous locally heavy showers and isolated thunderstorms. .SUNDAY...Southwest wind 5 to 10 kt. Wind waves 2 ft or less. Northeast swell 4 to 5 ft. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...Southwest wind 5 to 10 kt. Wind waves 2 ft or less. Northeast swell 4 to 5 ft. Numerous locally heavy showers and isolated thunderstorms. .MONDAY...Southwest wind 5 to 15 kt with gusts to 25 kt. Wind waves 2 to 4 ft. Mixed swell northeast 4 to 5 ft and southwest 3 ft. Chance of showers and slight chance of thunderstorms. .TUESDAY AND WEDNESDAY...South wind 15 to 20 kt with gusts to 30 kt. Wind waves 3 to 5 ft. Mixed swell northeast 4 to 6 ft and southwest 3 to 5 ft. Showers likely and slight chance of thunderstorms. $$ PMZ153-154-182130- Tinian Coastal Waters-Saipan Coastal Waters- 341 PM ChST Fri Oct 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY SATURDAY MORNING... .TONIGHT...East wind 15 to 20 kt with gusts to 30 kt. Wind waves 3 to 5 ft. Northeast swell 5 to 6 ft. Scattered showers in the evening, then numerous locally heavy showers near midnight. .SATURDAY AND SATURDAY NIGHT...East to southeast wind 10 to 20 kt. Wind waves 2 to 4 ft. Northeast swell 5 to 6 ft. Numerous locally heavy showers and isolated thunderstorms. .SUNDAY...Southeast wind 5 to 15 kt. Wind waves 1 to 3 ft. Northeast swell 4 to 5 ft. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...South wind 5 to 10 kt. Wind waves 2 ft or less. Northeast swell 5 to 6 ft. Numerous locally heavy showers and isolated thunderstorms. .MONDAY...South wind 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell northeast 4 to 6 ft and southwest 3 ft. Chance of showers and slight chance of thunderstorms. .TUESDAY AND WEDNESDAY...South wind 15 to 20 kt with gusts to 30 kt. Wind waves 3 to 5 ft. Mixed swell northeast 4 to 6 ft and southwest 3 to 4 ft. Showers likely and slight chance of thunderstorms. $$