Heavy Rainfall and Flash Flood Threats From the Lower Mississippi Valley Into Ohio/Tennessee Valleys; Elevated to Critical Fire Concerns Out West

Heavy to excessive rainfall with flash flood concerns will be possible from the Lower Mississippi Valley into parts of the Ohio/Tennessee Valleys. Elevated to Critical Fire weather threats will persist across the Great Basin and central Rockies. Finally, Major to Record river flooding will continue in portions of the Midwest and across parts of North and South Carolina.

For More Weather Information:

Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

  • Tonight

    Partly Cloudy

    NE 10kt

    Low: 55 °F

  • Sunday


    Light Wind

    High: 63 °F

  • Sunday

    Partly Cloudy

    Winds IncreasingNE 20kt
    Waves Building3ft

    Low: 49 °F

  • Monday


    NE 20ktWinds Decreasing

    High: 55 °F

  • Monday

    Mostly Clear

    E 10kt

    Low: 52 °F

  • Tuesday

    Showers Likely

    ESE 15kt

    High: 63 °F

  • Tuesday


    SSE 20kt
    Waves Building7ft

    Low: 62 °F

  • Wednesday


    S 15kt

    High: 68 °F

  • Wednesday

    Showers Likely

    SSW 15kt

    Low: 61 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:40 pm EDT Sep 22, 2018
Forecast Valid: 9pm EDT Sep 22, 2018-6pm EDT Sep 29, 2018

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Detailed Forecast

Synopsis: ANZ100-231245- 636 PM EDT Sat Sep 22 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure over the Great Lakes will build into the region tonight before being replaced by a stronger area of high pressure that will arrive from Canada late Sunday. This high will remain over the northeast through Monday before moving east into the Canadian Maritimes and allowing a warm front to move over the waters on Tuesday followed by a cold front late Wednesday. && $$

NE wind around 10 kt. Partly cloudy. Seas around 2 ft.
Variable winds 5 kt or less. Sunny. Seas around 1 ft.
Sunday Night
WNW wind 5 to 8 kt becoming NE 15 to 20 kt after midnight. Partly cloudy. Seas 1 ft building to 3 ft.
NE wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. Sunny. Seas around 5 ft.
Monday Night
E wind around 10 kt. Mostly clear. Seas around 4 ft.
ESE wind 10 to 15 kt, with gusts as high as 20 kt. Showers likely, mainly after 2pm. Seas 3 to 4 ft.
Tuesday Night
SSE wind 15 to 20 kt, with gusts as high as 30 kt. Rain. Seas 5 ft building to 7 ft.
S wind around 15 kt, with gusts as high as 25 kt. Showers. Seas around 5 ft.
Wednesday Night
SSW wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers likely. Seas around 6 ft.


  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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Point Forecast: 43.18°N 70.24°W
Last Update: 6:40 pm EDT Sep 22, 2018
Forecast Valid: 9pm EDT Sep 22, 2018-6pm EDT Sep 29, 2018
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