Severe Thunderstorms Possible for the Great Lakes into Ohio Valley; Heavy to Excessive Rainfall Over the Southern Plains

Severe thunderstorms will race along a cold front from the Upper Mississippi Valley into the Great Lakes and Ohio Valley with the main threat being damaging winds. The tail end of this front will possibly produce heavy to excessive rainfall across the southern Plains into the Lower Mississippi Valley through Saturday. Finally, Major-to-record river flooding continues across the Carolinas.
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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]
  • Tonight

    Chance Drizzle

    Light Wind
    3-4ft

    Low: 59 °F

  • Friday

    Chance Drizzle

    Winds IncreasingS 20kt
    4ft

    High: 68 °F

    Gale Warning
    Gale Warning

  • Friday
    Night

    Chance Showers

    SW 20kt
    5ft

    Low: 63 °F

    Gale Warning
    Gale Warning

  • Saturday

    Partly Sunny

    W 15kt
    3-4ft

    High: 66 °F

  • Saturday
    Night

    Mostly Cloudy

    NNE 10kt
    2ft

    Low: 57 °F

  • Sunday

    Partly Sunny

    Light Wind
    2ft

    High: 64 °F

  • Sunday
    Night

    Mostly Clear

    Winds IncreasingNE 15kt
    2-3ft

    Low: 54 °F

  • Monday

    Sunny

    ENE 15kt
    4-5ft

    High: 59 °F

  • Monday
    Night

    Mostly Clear

    E 10kt
    3ft

    Low: 56 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:51 pm EDT Sep 20, 2018
Forecast Valid: 10pm EDT Sep 20, 2018-6pm EDT Sep 27, 2018

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Detailed Forecast


Synopsis: ANZ100-211530- 927 PM EDT Thu Sep 20 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure over the region will slowly retreat into the maritimes through tonight. An increasing south to southwest flow will develop in advance of an approaching strong cold front. The front will pass across the waters late Friday night with north to northwest winds behind the front. High pressure builds across the waters over the weekend allowing winds to diminish and become light. && $$

Tonight
Variable winds 5 kt or less. A chance of drizzle after 11pm. Patchy fog after 11pm. Seas 3 to 4 ft.
Friday
S wind 10 to 15 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 30 kt. A chance of drizzle before 9am. Patchy fog before 9am. Seas around 4 ft.
Friday Night
SW wind around 20 kt, with gusts as high as 35 kt. A chance of showers after midnight. Seas around 5 ft.
Saturday
W wind 10 to 15 kt becoming N in the afternoon. Winds could gust as high as 25 kt. Partly sunny. Seas 3 to 4 ft.
Saturday Night
NNE wind 5 to 10 kt. Mostly cloudy. Seas around 2 ft.
Sunday
Variable winds 5 kt or less. Partly sunny. Seas around 2 ft.
Sunday Night
S wind 5 to 8 kt becoming NE 10 to 15 kt. Winds could gust as high as 20 kt. Mostly clear. Seas 2 to 3 ft.
Monday
ENE wind 10 to 15 kt, with gusts as high as 25 kt. Sunny. Seas 4 to 5 ft.
Monday Night
E wind around 10 kt. Mostly clear. Seas around 3 ft.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 43.18°N 70.24°W
Last Update: 5:51 pm EDT Sep 20, 2018
Forecast Valid: 10pm EDT Sep 20, 2018-6pm EDT Sep 27, 2018
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