Threat For Heavy Rainfall And Flash Flooding Continues From The Mid South To The Mid Atlantic; Critical Fire Weather Over The Western U.S.

A slow moving low pressure system will bring a continued threat for heavy rainfall and flooding from portions of the Mid South to the Ohio Valley and Mid Atlantic through midweek. Some areas could see locally significant flooding. Out west,very dry humidity combined with gusty winds will lead to a continued threat for critical fire weather and dry thunderstorms.
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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]
  • Today

    Rain Likely

    SE 15kt
    4-5ft

    High: 62 °F

  • Tonight

    Rain

    SSE 25ktWinds Decreasing
    Waves Building10ft

    Low: 62 °F

    Gale Warning
    Gale Warning

  • Wednesday

    Chance Showers

    S 15kt
    6-7ft

    High: 68 °F

  • Wednesday
    Night

    Showers Likely

    S 20ktWinds Decreasing
    6-7ft

    Low: 57 °F

  • Thursday

    Partly Sunny

    NNW 15kt
    6ftWaves Subsiding

    High: 62 °F

  • Thursday
    Night

    Mostly Cloudy

    NE 10kt
    3-4ft

    Low: 56 °F

  • Friday

    Partly Sunny

    Light Wind
    3ft

    High: 62 °F

  • Friday
    Night

    Mostly Clear

    SW 10kt
    3ft

    Low: 58 °F

  • Saturday

    Sunny

    WNW 10kt
    3ft

    High: 63 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:40 am EDT Sep 25, 2018
Forecast Valid: 8am EDT Sep 25, 2018-6pm EDT Oct 1, 2018

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Detailed Forecast


Synopsis: ANZ100-252130- 318 AM EDT Tue Sep 25 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... A warm front will approach from the southwest today and will lift into northern Maine Tuesday night. Low pressure will move northeast through central Quebec on Wednesday and will drive a trailing cold front through the region Wednesday night. High pressure will build in from the west on Thursday and will hold over the area on Friday. && $$

Today
SE wind around 15 kt, with gusts as high as 25 kt. Rain likely, mainly after 3pm. Seas 4 to 5 ft.
Tonight
SSE wind 20 to 25 kt becoming S 15 to 20 kt after midnight. Winds could gust as high as 35 kt. Rain, mainly before 3am. Seas 8 ft building to 10 ft.
Wednesday
S wind around 15 kt, with gusts as high as 25 kt. A chance of showers before 3pm. Seas 6 to 7 ft.
Wednesday Night
S wind 17 to 20 kt becoming WSW 15 to 18 kt after midnight. Winds could gust as high as 25 kt. Showers and thunderstorms likely before 3am, then a chance of showers between 3am and 5am. Seas 6 to 7 ft.
Thursday
NNW wind 10 to 15 kt becoming NNE in the afternoon. Partly sunny. Seas 6 ft subsiding to 4 ft.
Thursday Night
NE wind 5 to 10 kt. Mostly cloudy. Seas 3 to 4 ft.
Friday
Variable winds 5 kt or less. Partly sunny. Seas around 3 ft.
Friday Night
S wind around 10 kt becoming W after midnight. Mostly clear. Seas around 3 ft.
Saturday
WNW wind 5 to 10 kt becoming WSW in the afternoon. Sunny. Seas around 3 ft.

Winds and seas higher in and near tstms.

*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: 6:40 am EDT Sep 25, 2018
Forecast Valid: 8am EDT Sep 25, 2018-6pm EDT Oct 1, 2018
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