Excessive Heat From the Midwest to Northeast Today; Heavy Rainfall Threat Increasing Along the western Gulf Coast

Heat Advisories, and in some areas, Excessive Heat Warnings, continue today as hot temperatures and high humidity combine to create dangerous conditions. A slow-moving cold front from the Northeast to the northern Rockies will be the focus for potentially heavy rainfall this week, while tropical moisture moving into the western Gulf Coast will lead to an increased flash flood threat.
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Gray/Portland, ME Local Forecast Office

20NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]
  • Tonight

    Severe Thunderstorms

    Winds IncreasingSW 20kt
    4-5ft

    Low: 63 °F

    Small Craft Advisory
    Small Craft Advisory

  • Tuesday

    Becoming Sunny

    NNW 10kt
    2-3ft

    High: 75 °F

  • Tuesday
    Night

    Clear

    NNW 10kt
    2ft

    Low: 56 °F

  • Wednesday

    Sunny

    Winds IncreasingS 10kt
    1-2ft

    High: 68 °F

  • Wednesday
    Night

    Partly Cloudy

    SSW 15ktWinds Decreasing
    3ft

    Low: 59 °F

  • Thursday

    Sunny

    N 10kt
    2ft

    High: 64 °F

  • Thursday
    Night

    Mostly Clear

    Light Wind
    1ft

    Low: 54 °F

  • Friday

    Sunny

    Winds IncreasingS 10kt
    1ft

    High: 64 °F

  • Friday
    Night

    Mostly Clear

    S 15kt
    3ft

    Low: 59 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:28 pm EDT Jun 18, 2018
Forecast Valid: 6pm EDT Jun 18, 2018-6pm EDT Jun 25, 2018

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Detailed Forecast


Synopsis: ANZ100-191115- 506 PM EDT Mon Jun 18 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... Southwest flow will continue through this evening ahead of an approaching cold front before shifting to the northwest before daybreak Tuesday. High pressure will build into the region on Tuesday and persist into Wednesday before a cold front arrives Wednesday night. $$

Tonight
SSW wind 10 to 15 kt becoming SW 15 to 20 kt after midnight. Winds could gust as high as 25 kt. Showers and thunderstorms likely. Some storms could be severe, with damaging winds, heavy rain, and frequent lightning. Patchy fog after midnight. Seas 4 to 5 ft.
Tuesday
NNW wind 5 to 10 kt. Partly sunny, then gradually becoming sunny. Seas 2 to 3 ft.
Tuesday Night
NNW wind 5 to 10 kt. Clear. Seas around 2 ft.
Wednesday
W wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas 1 to 2 ft.
Wednesday Night
SSW wind 10 to 15 kt becoming NW 5 to 8 kt after midnight. Partly cloudy. Seas around 3 ft.
Thursday
N wind 5 to 10 kt becoming E in the afternoon. Sunny. Seas around 2 ft.
Thursday Night
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
Friday
NNW wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas around 1 ft.
Friday Night
S wind 10 to 15 kt becoming SW 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: 43.17°N 70.36°W
Last Update: 4:28 pm EDT Jun 18, 2018
Forecast Valid: 6pm EDT Jun 18, 2018-6pm EDT Jun 25, 2018
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