Dangerous Heat Wave To Persist From The Midwest to the Ohio Valley

A very hot and humid air mass will persist today across much of the Midwest and Ohio Valley. Afternoon high temperatures will exceed 95 degrees in many locations with heat index values between 100 and 110. Hot temperatures will expand into the eastern U.S. on Monday with several of the major I-95 cities reaching 90 degrees or higher. Take it slow, drink plenty of fluids and limit outdoor exposure.
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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]
  • Overnight

    Partly Cloudy

    SSW 10kt
    2ft

    Low: 59 °F

  • Monday

    Severe Thunderstorms

    SSW 20kt
    4-5ft

    High: 70 °F

    Small Craft Advisory
    Small Craft Advisory

  • Monday
    Night

    Severe Thunderstorms

    SW 15kt
    5-6ft

    Low: 60 °F

    Small Craft Advisory
    Small Craft Advisory

  • Tuesday

    Mostly Sunny

    NNW 10kt
    2-3ft

    High: 77 °F

  • Tuesday
    Night

    Mostly Clear

    Light Wind
    2ft

    Low: 58 °F

  • Wednesday

    Sunny

    Winds IncreasingS 10kt
    1-2ft

    High: 67 °F

  • Wednesday
    Night

    Mostly Clear

    SSW 15kt
    3ft

    Low: 58 °F

  • Thursday

    Sunny

    N 10kt
    2ft

    High: 64 °F

  • Thursday
    Night

    Mostly Clear

    SSW 10kt
    1-2ft

    Low: 56 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:13 pm EDT Jun 17, 2018
Forecast Valid: 11pm EDT Jun 17, 2018-6pm EDT Jun 24, 2018

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Detailed Forecast


Synopsis: ANZ100-181415- 812 PM EDT Sun Jun 17 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure continues to move east over the Gulf of Maine. Southwesterly flow increases tomorrow ahead of a cold front arriving from the northwest. This front will blow through the Gulf of Maine tomorrow night with high pressure building out of the Great Lakes and into southern New England behind it. The next front arrives on Wednesday. $$

Overnight
S wind around 10 kt becoming SSW after midnight. Partly cloudy. Seas around 2 ft.
Monday
SSW wind 15 to 20 kt. Showers and thunderstorms likely, mainly after 5pm. Some storms could be severe, with damaging winds, heavy rain, and frequent lightning. Seas 4 to 5 ft.
Monday Night
SW wind around 15 kt, with gusts as high as 25 kt. Showers and thunderstorms likely before 1am, then a chance of showers between 1am and 4am. Some storms could be severe, with damaging winds, heavy rain, and frequent lightning. Seas 5 to 6 ft.
Tuesday
NNW wind around 10 kt. Mostly sunny. Seas 2 to 3 ft.
Tuesday Night
Variable winds 5 kt or less. Mostly 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 after midnight. Mostly clear. Seas around 3 ft.
Thursday
N wind 5 to 10 kt becoming SE in the afternoon. Sunny. Seas around 2 ft.
Thursday Night
SSW wind 5 to 10 kt becoming N after midnight. Mostly clear. Seas 1 to 2 ft.

*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: 8:13 pm EDT Jun 17, 2018
Forecast Valid: 11pm EDT Jun 17, 2018-6pm EDT Jun 24, 2018
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