Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 192119 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 519 PM EDT Mon Aug 19 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-201030- 519 PM EDT Mon Aug 19 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... A weak cold front will move across the waters this evening triggering scattered thunderstorms, a few strong storms possible. Thunderstorms weaken and move offshore shortly after sunset with light northwest winds to follow, providing good vsbys and dry weather into Tue evening. Late Tue night the front returns northward as a warm front. Risk for more showers and thunderstorms Wed and possibly into Thu. A stronger cold front sweeps across the waters late Thu followed by dry weather and good vsby Fri into the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the Current Hazards link above the map on the left. $$ ANZ250-201030- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 519 PM EDT Mon Aug 19 2019 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 4 ft. Isolated showers and tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers and tstms. .THU NIGHT...W winds around 10 kt. Seas 2 to 4 ft. A chance of showers and tstms. .FRI THROUGH SAT...NE winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-201030- Massachusetts Bay and Ipswich Bay- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Scattered showers with isolated tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...NW winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .THU NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .FRI THROUGH SAT...NE winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ231-201030- Cape Cod Bay- 519 PM EDT Mon Aug 19 2019 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas around 2 ft. Isolated showers and tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .WED...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .FRI THROUGH SAT...NE winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-201030- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 519 PM EDT Mon Aug 19 2019 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 4 ft. Isolated tstms. Patchy fog after midnight. Some tstms may produce damaging winds, large hail, and heavy rainfall. Vsby 1 NM or less after midnight. .TUE...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers and tstms. .THU NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers and tstms. .FRI...NW winds 5 to 10 kt. Seas 3 to 5 ft. .FRI THROUGH SAT...N winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-201030- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 519 PM EDT Mon Aug 19 2019 .TONIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog after midnight. Isolated tstms after midnight. Some tstms may produce damaging winds, large hail, and heavy rainfall after midnight with vsby 1 NM or less. .TUE...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. .THU NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 4 to 6 ft. Showers and tstms likely. .FRI...NW winds around 10 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft. .SAT...N winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-201030- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 519 PM EDT Mon Aug 19 2019 .TONIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Isolated tstms after midnight. Some tstms may produce damaging winds, large hail, and heavy rainfall after midnight. .TUE...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. A chance of showers. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. .THU NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 5 to 6 ft. A chance of showers and tstms. .FRI THROUGH SAT...N winds 5 to 10 kt. Seas 3 to 5 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ232-201030- Nantucket Sound- 519 PM EDT Mon Aug 19 2019 .TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...NW winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. .TUE NIGHT...S winds around 5 kt. Seas 1 foot or less. A chance of showers. .WED...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers and tstms. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers and tstms. .THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. .FRI THROUGH SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-201030- Vineyard Sound- 519 PM EDT Mon Aug 19 2019 .TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...NW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. .TUE NIGHT...S winds around 5 kt. Seas 1 foot or less. A chance of showers. .WED...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. .THU NIGHT...W winds around 10 kt. Seas 2 to 4 ft. A chance of showers and tstms. .FRI...NW winds 5 to 10 kt. Seas 2 to 4 ft. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-201030- Buzzards Bay- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Isolated tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. .TUE NIGHT...S winds around 5 kt. Seas 1 foot or less. A chance of showers. .WED...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. .THU NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .FRI THROUGH SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-201030- Rhode Island Sound- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Isolated tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers and tstms. .THU AND THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers and tstms. .FRI...NW winds 5 to 10 kt. Seas 3 to 5 ft. .SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-201030- Block Island Sound- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog after midnight with vsby 1 to 3 NM. .TUE...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...S winds around 5 kt. Seas around 2 ft. A chance of showers. .WED...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers and tstms. .THU AND THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers and tstms. .FRI THROUGH SAT...N winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-201030- Boston Harbor- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Waves around 2 ft. Scattered showers with isolated tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .WED...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms. .THU NIGHT...W winds around 5 kt. Waves 1 foot or less. A chance of showers and tstms. .FRI THROUGH SAT...NE winds around 5 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ236-201030- Narragansett Bay- 519 PM EDT Mon Aug 19 2019 ...SEVERE THUNDERSTORM WATCH 600 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt this evening. Waves 2 to 3 ft. Isolated tstms this evening. Some tstms may produce damaging winds, large hail, and heavy rainfall this evening. .TUE...N winds around 5 kt, becoming S in the afternoon. Waves 2 to 3 ft. .TUE NIGHT...S winds around 5 kt. Waves around 2 ft. A chance of showers. .WED...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers and tstms. .WED NIGHT AND THU...SW winds 5 to 10 kt. Waves 2 to 4 ft. A chance of showers and tstms. .THU NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers and tstms. .FRI THROUGH SAT...N winds 5 to 10 kt. Waves 2 to 3 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston

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