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]
  • Overnight

    Mostly Cloudy

    ESE 15kt
    4ft

    Low: 47 °F

  • Tuesday

    Rain

    SE 20kt
    Waves Building6ft

    High: 62 °F

  • Tuesday
    Night

    Rain

    SSE 25ktWinds Decreasing
    9ftWaves Subsiding

    Low: 62 °F

  • Wednesday

    Chance Thunderstorms

    S 20kt
    5-6ft

    High: 68 °F

  • Wednesday
    Night

    Showers Likely

    SSW 20kt
    6ft

    Low: 59 °F

  • Thursday

    Partly Sunny

    NNW 15kt
    6ftWaves Subsiding

    High: 62 °F

  • Thursday
    Night

    Partly Cloudy

    ENE 10kt
    3ft

    Low: 57 °F

  • Friday

    Partly Sunny

    Light Wind
    3ft

    High: 62 °F

  • Friday
    Night

    Mostly Clear

    W 10kt
    3ft

    Low: 58 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:42 pm EDT Sep 24, 2018
Forecast Valid: 4am 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. && $$

Overnight
ESE wind around 15 kt. Mostly cloudy. Seas around 4 ft.
Tuesday
SE wind 15 to 20 kt, with gusts as high as 30 kt. Rain, mainly after 2pm. Patchy fog after noon. Seas 4 ft building to 6 ft.
Tuesday Night
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 5am. Patchy fog before 10pm. Seas 9 ft subsiding to 7 ft.
Wednesday
S wind 15 to 20 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 5 to 6 ft.
Wednesday Night
SSW wind 15 to 20 kt becoming W after midnight. Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am. Seas around 6 ft.
Thursday
NNW wind 10 to 15 kt becoming NE in the afternoon. Partly sunny. Seas 6 ft subsiding to 4 ft.
Thursday Night
E wind 5 to 10 kt becoming NE after midnight. Partly cloudy. Seas around 3 ft.
Friday
Variable winds 5 kt or less. Partly sunny. Seas around 3 ft.
Friday Night
SSW wind around 10 kt becoming W after midnight. Mostly clear. 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: 10:42 pm EDT Sep 24, 2018
Forecast Valid: 4am EDT Sep 25, 2018-6pm EDT Oct 1, 2018
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