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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5NM NNW San Francisco CA

Marine Point Forecast

[NOTICE]
  • Overnight

    Mostly Clear

    N 7kt
  • Monday

    Sunny

    N 10kt
  • Monday
    Night

    Partly Cloudy

    N 8kt
  • Tuesday

    Partly Sunny

    Winds IncreasingSSW 13kt
  • Tuesday
    Night

    Rain Likely

    SSW 11kt
  • Wednesday

    Slight Chc Rain

    NW 10kt
  • Wednesday
    Night

    Mostly Clear

    N 8kt
  • Thursday

    Sunny

    Light Wind
  • Thursday
    Night

    Mostly Clear

    Light Wind

Associated Zone Forecast which includes this point

Last Update: 2:14 am PST Dec 18, 2017
Forecast Valid: 3am PST Dec 18, 2017-6pm PST Dec 24, 2017

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Detailed Forecast


Synopsis: PZZ500-181215- 831 PM PST Sun Dec 17 2017 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Surface high pressure 650 miles west of the Bay Area will gradually move southeast and weaken through early week. As a result winds will diminish tonight and remain mainly light Monday into Tuesday. South to southwest winds Tuesday precede the arrival of a moderate cold front Tuesday evening and early Wednesday morning. Modified arctic air and high pressure will build over the eastern Pacific and extend into the Intermountain West. Post cold frontal northwest winds will become gusty over the coastal waters and bays mid to late this week. A dry cold front will usher in a reinforcement of modified arctic air from the north and northeast beginning Saturday evening and continuing into early next week. $$

Overnight
N wind around 7 kt. Mostly clear.
Monday
N wind 8 to 10 kt. Sunny.
Monday Night
N wind around 8 kt. Partly cloudy.
Tuesday
Variable winds less than 5 kt becoming SSW 8 to 13 kt in the morning. Partly sunny.
Tuesday Night
SSW wind 7 to 11 kt. Rain likely, mainly between 10pm and 4am.
Wednesday
NW wind around 10 kt. A slight chance of rain before 10am.
Wednesday Night
N wind 6 to 8 kt. Mostly clear.
Thursday
Variable winds 5 kt or less. Sunny.
Thursday Night
Variable winds 5 kt or less. Mostly clear.

*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: 37.86°N 122.46°W
Last Update: 2:14 am PST Dec 18, 2017
Forecast Valid: 3am PST Dec 18, 2017-6pm PST Dec 24, 2017
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