Heavy rain, mountain snow and strong winds in the western U.S. this week

The western U.S. will experience active weather yet again this week as significant Pacific moisture brings rain and mountain snow to the region. This heavy rain will bring flood concerns to parts of WA, OR and CA. Very heavy snow is possible in the Sierra, Cascades, Great Basin and parts of the northern Rockies.
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6NM WNW San Francisco CA

Marine Point Forecast

[NOTICE]
  • Tonight

    Slight Chc Rain

    Winds IncreasingS 9kt
    5-6ft
  • Wednesday

    Heavy Rain

    Winds IncreasingS 26kt
    Waves Building11ft

    Gale Warning
    Gale Warning

  • Wednesday
    Night

    Heavy Rain

    S 36ktWinds Decreasing
    17ftWaves Subsiding

    Gale Warning
    Gale Warning

  • Thursday

    Chance Showers

    W 11ktWinds Decreasing
    11ft
  • Thursday
    Night

    Heavy Rain

    SW 15kt
    12ft
  • Friday

    Heavy Rain

    ESE 18kt
    12-13ft
  • Friday
    Night

    Chance Showers

    W 24kt
    17-19ft
  • Saturday

    Slight Chc Showers

    W 13kt
    19-20ft
  • Saturday
    Night

    Chance Showers

    S 17kt
    13-15ft

Associated Zone Forecast which includes this point

Last Update: 1:59 pm PST Jan 17, 2017
Forecast Valid: 6pm PST Jan 17, 2017-6pm PST Jan 24, 2017

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH

Synopsis: GREATER FARALLONES...AND CORDELL BANK NATIONAL MARINE SANCTUARIES...

SOUTHERLY WINDS WILL INCREASE BY WEDNESDAY AHEAD OF A FRONTAL SYSTEM. WINDS WILL DECREASE LATE WEDNESDAY NIGHT AS THE LOW LIFTS NORTHEAST BUT WILL INCREASE AGAIN BY FRIDAY AS ANOTHER STORM APPROACHES. VERY LARGE WEST SWELLS WILL ARRIVE LATER THIS WEEK WITH SWELLS BUILDING AS HIGH AS OVER 25 FEET FRIDAY AND SATURDAY.

Tonight
Variable winds less than 5 kt becoming S 5 to 9 kt in the evening. A slight chance of rain after 4am. W swell 6 ft at 15 seconds. Wind waves around 1 ft.
Wednesday
S wind 15 to 20 kt increasing to 21 to 26 kt in the afternoon. Rain, mainly after 10am. The rain could be heavy at times. W swell 10 ft at 14 seconds. Wind waves 2 ft building to 6 ft.
Wednesday Night
S wind 26 to 36 kt becoming W 14 to 24 kt in the evening. Winds could gust as high as 43 kt. Rain, mainly before 10pm. The rain could be heavy at times. WNW swell 13 to 14 ft at 14 seconds becoming WSW. Wind waves 10 ft subsiding to 2 ft.
Thursday
W wind 6 to 11 kt becoming variable and less than 5 kt in the morning. A chance of showers. W swell 11 ft. Wind waves around 1 ft.
Thursday Night
SW wind 13 to 15 kt. Rain, mainly after 10pm. The rain could be heavy at times. W swell 12 ft. Wind waves around 2 ft.
Friday
ESE wind around 18 kt becoming W in the morning. Rain. The rain could be heavy at times. W swell 13 ft. Wind waves around 2 ft.
Friday Night
W wind 16 to 24 kt. A chance of showers. W swell 19 ft. Wind waves 6 ft subsiding to 2 ft.
Saturday
W wind 11 to 13 kt. A slight chance of showers. W swell 19 to 20 ft. Wind waves 1 to 2 ft.
Saturday Night
S wind 14 to 17 kt. A chance of showers. W swell 13 to 15 ft. Wind waves around 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: 37.8°N 122.53°W
Last Update: 1:59 pm PST Jan 17, 2017
Forecast Valid: 6pm PST Jan 17, 2017-6pm PST Jan 24, 2017
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