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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18NM S San Francisco CA

Marine Point Forecast

[NOTICE]
  • Overnight

    Mostly Clear

    NE 10kt
    4ft
  • Monday

    Sunny

    ENE 9ktWinds Decreasing
    2-3ft
  • Monday
    Night

    Partly Cloudy

    Light Wind
    3ft
  • Tuesday

    Mostly Sunny

    Winds IncreasingS 12kt
    4ft
  • Tuesday
    Night

    Chance Rain

    SSW 10kt
    4ft
  • Wednesday

    Chance Rain

    NW 13kt
    Waves Building7ft
  • Wednesday
    Night

    Mostly Clear

    N 10kt
    5-6ft
  • Thursday

    Sunny

    NNE 7kt
    4ft
  • Thursday
    Night

    Mostly Clear

    NW 6kt
    4ft

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
NE wind around 10 kt. Mostly clear. NW swell 4 ft at 12 seconds. Wind waves around 1 ft.
Monday
ENE wind 5 to 9 kt becoming variable and less than 5 kt in the morning. Sunny. NW swell 3 ft at 11 seconds. Wind waves around 1 ft.
Monday Night
Variable winds 5 kt or less. Partly cloudy. WNW swell 3 ft at 11 seconds building to at 15 seconds . Wind waves around 1 ft.
Tuesday
Variable winds less than 5 kt becoming S 7 to 12 kt in the morning. Mostly sunny. WNW swell 4 ft. Wind waves around 1 ft.
Tuesday Night
SSW wind 7 to 10 kt. A chance of rain after 10pm. WNW swell 4 ft. Wind waves around 1 ft.
Wednesday
NW wind 11 to 13 kt. A chance of rain before 10am. WNW swell 4 ft. Wind waves 1 ft building to 5 ft.
Wednesday Night
N wind 8 to 10 kt. Mostly clear. WNW swell 5 to 6 ft. Wind waves around 1 ft.
Thursday
NNE wind around 7 kt. Sunny. WNW swell 4 ft. Wind waves around 1 ft.
Thursday Night
NW wind around 6 kt. Mostly clear. WNW swell 4 ft. Wind waves around 1 ft.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Combined seas 6 to 8 ft at 12 seconds. ACROSS THE BAR...Combined seas 7 to 9 ft at 12 seconds. Maximum ebb current of 0.7 knots at 04:06 AM Monday and 1.9 knots at 03:48 PM Monday.

*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: 37.49°N 122.48°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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