Heavy Rains Expected to Impact Parts of the Eastern U.S.

A strong cold front will produce heavy rain will create mainly localized areas of flash flooding to the Great Lakes and Ohio Valley. There is another flash flood threat in the parts of the Southeast and Southern Appalachians.
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Norton, MA Local Forecast Office

3NM SSE Portsmouth RI

Marine Point Forecast

[NOTICE]

Today

SE 10kt
1ft
High: 72 °F
Tonight

SE 10kt
1ft
Low: 67 °F
Wednesday

SSE 12kt
1ft
High: 74 °F
Wednesday
Night
SSE 11kt
1ft
Low: 70 °F
Thursday

SSE 13kt
1ft
High: 75 °F
Thursday
Night
SSE 12kt
1ft
Low: 67 °F
Friday

SSE 10kt
1ft
High: 73 °F
Friday
Night
S 8kt
1ft
Low: 63 °F
Saturday

S 9kt
1ft
High: 71 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:02 am EDT Sep 21, 2021
Forecast Valid: 6am EDT Sep 21, 2021-6pm EDT Sep 27, 2021

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Detailed Forecast

Synopsis: ANZ200-212100- 427 AM EDT Tue Sep 21 2021 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres S of the Maritimes moves farther offshore tonight into Wed. By late this week, a cold front approaches New England from the W, and will be accompanied by scattered showers, with locally heavy rain possible and isolated thunderstorms. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo $$

Today

E wind 6 to 10 kt becoming SE in the afternoon. Mostly sunny. Seas around 1 ft.

Tonight

SE wind 8 to 10 kt. A slight chance of showers after 3am. Seas around 1 ft.

Wednesday

SSE wind around 12 kt. A slight chance of showers before 10am. Seas around 1 ft.

Wednesday Night

SSE wind around 11 kt. A chance of showers, mainly after 3am. Seas around 1 ft.

Thursday

SSE wind 11 to 13 kt. A chance of showers, with thunderstorms also possible after 9am. Seas around 1 ft.

Thursday Night

SSE wind around 12 kt. A chance of showers and thunderstorms, mainly after 3am. Seas around 1 ft.

Friday

SSE wind around 10 kt. A chance of showers before 1pm, then a chance of showers after 3pm. Seas around 1 ft.

Friday Night

S wind 5 to 8 kt. A chance of showers. Seas around 1 ft.

Saturday

S wind 5 to 9 kt. A chance of showers. Seas around 1 ft.

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.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.