Significant Snowfall for Washington Cascades and Northern Rocky Mountains

A cold front will linger for several days from the Pacific Northwest to portions of the northern Plains early this week. Cold temperatures and copious moisture will combine to produce several feet of snow into the mountain passes, with up to 4 feet of snow down to 4000 feet in the northern Rockies. Travel through mountain passes will be very difficult.
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Hazardous Weather Conditions

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Anchorage, AK Local Forecast Office

5NM S Chiswell Islands AK

Marine Point Forecast

[NOTICE]
  • Overnight

    Clear

    N 10kt
    5ft

    Low: 34 °F

  • Monday

    Sunny

    Light Wind
    3-5ft

    High: 40 °FFalling Temperatures

  • Monday
    Night

    Snow Likely

    S 10kt
    3-4ft

    Low: 31 °F

  • Tuesday

    Rain

    Winds IncreasingS 20kt
    Waves Building7ft

    High: 42 °F

  • Tuesday
    Night

    Chance Rain

    W 20kt
    6-8ft

    Low: 39 °F

  • Wednesday

    Mostly Sunny

    W 15kt
    3-5ft

    High: 40 °F

  • Wednesday
    Night

    Partly Cloudy

    W 10kt
    3ft

    Low: 33 °F

  • Thursday

    Mostly Sunny

    Winds IncreasingE 15kt
    2-3ft

    High: 41 °F

  • Thursday
    Night

    Chance Rain

    Winds IncreasingE 25kt
    Waves Building9ft

    Low: 38 °F


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:05 pm AKST Dec 17, 2017
Forecast Valid: 3am AKST Dec 18, 2017-6pm AKST Dec 24, 2017

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Detailed Forecast

...SMALL CRAFT ADVISORY TONIGHT...

Synopsis: A 998 mb low 120 nm South of Middleton Island exits the Gulf 210 nm Southwest of Klawock at 1012 mb for Mon afternoon. High pressure slides across the Gulf through Tue afternoon. A front crosses the Western Gulf by Tue afternoon.

Overnight
N wind around 10 kt. Clear. Seas around 5 ft.
Monday
Variable winds 5 kt or less. Sunny. Seas 3 to 5 ft.
Monday Night
S wind 5 to 10 kt becoming SW in the evening. Snow likely, mainly after 3am. Seas 3 to 4 ft.
Tuesday
S wind 10 to 15 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Rain, mainly before noon. Seas 2 ft building to 7 ft.
Tuesday Night
W wind 15 to 20 kt, with gusts as high as 30 kt. A chance of rain before 9pm. Seas 6 to 8 ft.
Wednesday
W wind 10 to 15 kt. Mostly sunny. Seas 3 to 5 ft.
Wednesday Night
W wind 5 to 10 kt becoming NNE after midnight. Partly cloudy. Seas around 3 ft.
Thursday
NNE wind 5 to 10 kt becoming E 10 to 15 kt in the afternoon. Mostly sunny. Seas 2 to 3 ft.
Thursday Night
E wind 15 to 20 kt increasing to 20 to 25 kt after midnight. A chance of rain. Seas 3 ft building to 9 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: 59.52°N 149.63°W
Last Update: 6:05 pm AKST Dec 17, 2017
Forecast Valid: 3am AKST Dec 18, 2017-6pm AKST Dec 24, 2017
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