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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30NM WNW San Francisco CA

Marine Point Forecast

[NOTICE]
  • Today

    Heavy Rain

    Winds IncreasingSSE 33kt
    9-11ft
  • Tonight

    Heavy Rain

    S 39ktWinds Decreasing
    13ftWaves Subsiding
  • Thursday

    Scattered Showers

    W 9kt
    9ft
  • Thursday
    Night

    Heavy Rain

    WSW 13kt
    10ft
  • Friday

    Heavy Rain

    SE 25kt
    11-12ft
  • Friday
    Night

    Showers Likely

    W 23kt
    14-16ft
  • Saturday

    Chance Showers

    W 22kt
    15-17ft
  • Saturday
    Night

    Showers Likely

    S 27kt
    Waves Building16ft
  • Sunday

    Rain

    SSE 34ktWinds Decreasing
    12-14ft

Associated Zone Forecast which includes this point

Last Update: 5:15 am PST Jan 18, 2017
Forecast Valid: 6am PST Jan 18, 2017-6pm PST Jan 24, 2017

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Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 1 PM

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 26 FEET FRIDAY AND SATURDAY.

Today
SSE wind 18 to 23 kt increasing to 28 to 33 kt in the afternoon. Winds could gust as high as 41 kt. Rain likely, then rain and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. W swell 8 ft at 14 seconds. Wind waves 4 ft building to 8 ft.
Tonight
S wind 29 to 39 kt becoming W 10 to 20 kt in the evening. Winds could gust as high as 49 kt. Showers and possibly a thunderstorm before 10pm, then scattered showers. Some of the storms could produce heavy rainfall. WNW swell 10 ft at 14 seconds. Wind waves 9 ft subsiding to 2 ft.
Thursday
W wind 5 to 9 kt becoming SSW in the morning. Scattered showers. WNW swell 9 ft at 17 seconds. Wind waves 1 to 2 ft.
Thursday Night
WSW wind around 13 kt becoming SSW in the evening. Rain, mainly after 10pm. The rain could be heavy at times. WNW swell 10 ft. Wind waves around 3 ft.
Friday
SE wind 15 to 25 kt becoming WSW in the morning. Winds could gust as high as 31 kt. Rain. The rain could be heavy at times. WNW swell 11 ft. Wind waves 6 ft subsiding to 3 ft.
Friday Night
W wind around 23 kt, with gusts as high as 29 kt. Showers likely. WNW swell 15 ft. Wind waves around 5 ft.
Saturday
W wind 13 to 22 kt, with gusts as high as 28 kt. A chance of showers. WNW swell 15 to 16 ft. Wind waves 3 to 5 ft.
Saturday Night
S wind 21 to 27 kt. Showers likely. W swell 15 ft. Wind waves 5 to 6 ft.
Sunday
SSE wind 24 to 34 kt becoming WNW 12 to 22 kt in the morning. Rain. WNW swell 12 ft. Wind waves 8 ft subsiding to 3 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: 5:15 am PST Jan 18, 2017
Forecast Valid: 6am PST Jan 18, 2017-6pm PST Jan 24, 2017
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