Heavy Rainfall and Flash Flood Threats Shift From Southern Plains to Lower Mississippi Valley; Elevated to Critical Fire Concerns Out West

Heavy to excessive rainfall with flash flood concerns will shift from the southern Plains into the Lower Mississippi Valley. Elevated to Critical Fire weather threats will linger through the weekend 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 this weekend.

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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

  • Overnight

    Chance Thunderstorms

    SW 20kt

    Low: 64 °F

    Gale Warning
    Gale Warning

  • Saturday

    Mostly Sunny

    W 20ktWinds Decreasing
    6ftWaves Subsiding

    High: 70 °F

  • Saturday

    Mostly Clear

    N 10kt

    Low: 52 °F

  • Sunday

    Mostly Sunny

    Light Wind

    High: 63 °F

  • Sunday

    Partly Cloudy

    Winds IncreasingNNE 20kt
    Waves Building4ft

    Low: 49 °F

  • Monday


    NE 15ktWinds Decreasing

    High: 55 °F

  • Monday

    Mostly Clear

    E 10kt

    Low: 52 °F

  • Tuesday

    Chance Showers

    ESE 15kt

    High: 64 °F

  • Tuesday

    Showers Likely

    S 20kt

    Low: 61 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:19 am EDT Sep 22, 2018
Forecast Valid: 4am EDT Sep 22, 2018-6pm EDT Sep 28, 2018

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Detailed Forecast

Synopsis: ANZ100-221600- 1000 PM EDT Fri Sep 21 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... An increasing south to southwest flow will develop in advance of an approaching strong cold front. The front will pass across the waters late tonight with north to northwest winds behind the front. High pressure builds across the waters over the weekend allowing winds to diminish and become light. && $$

SW wind around 20 kt, with gusts as high as 30 kt. A chance of showers and thunderstorms. Seas around 7 ft.
W wind 15 to 20 kt becoming N 10 to 15 kt in the afternoon. Mostly sunny. Seas 6 ft subsiding to 4 ft.
Saturday Night
N wind 5 to 10 kt. Mostly clear. Seas around 2 ft.
Variable winds 5 kt or less. Mostly sunny. Seas 1 to 2 ft.
Sunday Night
SW wind 5 to 8 kt becoming NNE 15 to 20 kt. Winds could gust as high as 25 kt. Partly cloudy. Seas 1 ft building to 4 ft.
NE wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas 4 to 5 ft.
Monday Night
E wind around 10 kt. Mostly clear. Seas 2 to 3 ft.
ESE wind around 15 kt, with gusts as high as 20 kt. A chance of showers. Seas 2 to 3 ft.
Tuesday Night
S wind 15 to 20 kt, with gusts as high as 25 kt. Showers likely. Seas 4 to 5 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: 2:19 am EDT Sep 22, 2018
Forecast Valid: 4am EDT Sep 22, 2018-6pm EDT Sep 28, 2018
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