Deep Cold Trough Meets Gulf Moisture with Significant Impacts Across the Western and Central U.S.

A deep trough and associated cold front is bringing much below normal temperatures in the west, with low elevation snows. Strong winds and widespread snow, will impact the Great Basin, western mountains, and the Plains. The slowing front, will bring prolonged waves of heavy rain across the Mississippi Valley to the Great Lakes. Significant icing forecast north of the heavy rain. Big warm up east.
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30NM WNW San Francisco CA

Marine Point Forecast

[NOTICE]
  • Washington's
    Birthday

    Sunny

    NW 34kt
    < 1ft
  • Tonight

    Clear

    NNW 31ktWinds Decreasing
    < 1ft
  • Tuesday

    Increasing Clouds

    NW 16kt
    < 1ft
  • Tuesday
    Night

    Slight Chc Showers

    NNW 23kt
    < 1ft
  • Wednesday

    Slight Chc Showers

    E 11kt
    < 1ft
  • Wednesday
    Night

    Slight Chc Showers

    NW 13kt
    < 1ft
  • Thursday

    Partly Sunny

    Winds IncreasingNW 18kt
    < 1ft
  • Thursday
    Night

    Partly Cloudy

    NW 24kt
    < 1ft
  • Friday

    Mostly Sunny

    NNW 12kt
    < 1ft

Associated Zone Forecast which includes this point

Last Update: 8:13 am PST Feb 19, 2018
Forecast Valid: 2pm PST Feb 19, 2018-6pm PST Feb 25, 2018

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Detailed Forecast

...SMALL CRAFT ADVISORY FOR ROUGH BAR IN EFFECT UNTIL 8 PM PST

Synopsis: PZZ500-192345- 839 AM PST Mon Feb 19 2018 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Strong northwest winds will usher in arctic air today and generate fresh swell and steep wind waves. Showers will continue through the day. Another trough will swiftly move southward over the coastal waters late Wednesday night with a slight chance of showers. $$

Washington's Birthday
NW wind around 34 kt, with gusts as high as 43 kt. Sunny. Mixed swell...WNW 10 ft at 14 seconds and SSW 1 ft at 14 seconds. Wind waves around 10 ft.
Tonight
NNW wind 26 to 31 kt decreasing to 20 to 25 kt after midnight. Winds could gust as high as 38 kt. Clear. Mixed swell...WNW 9 to 10 ft at 13 seconds and SSW 1 ft at 15 seconds. Wind waves 8 ft subsiding to 4 ft.
Tuesday
NW wind 13 to 16 kt. Increasing clouds. Mixed swell...WNW 7 to 9 ft at 12 seconds and SSW 1 ft at 15 seconds. Wind waves around 2 ft.
Tuesday Night
NNW wind 15 to 23 kt. A slight chance of showers after 10pm. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves 5 ft subsiding to 2 ft.
Wednesday
E wind around 11 kt. A slight chance of showers before 10am. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves around 1 ft.
Wednesday Night
NW wind 6 to 13 kt becoming SSE in the evening. A slight chance of showers after 10pm. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves around 1 ft.
Thursday
Variable winds less than 5 kt becoming NW 13 to 18 kt in the morning. Partly sunny. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves 1 to 2 ft.
Thursday Night
NW wind around 24 kt, with gusts as high as 30 kt. Partly cloudy. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves 5 to 6 ft.
Friday
NNW wind 6 to 12 kt. Mostly sunny. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves around 1 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: 38°N 122.99°W
Last Update: 8:13 am PST Feb 19, 2018
Forecast Valid: 2pm PST Feb 19, 2018-6pm PST Feb 25, 2018
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