Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

39NM NW San Francisco CA

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:Variable winds 5 kt or less. Partly cloudy. Mixed swell...WNW 5 ft at 12 seconds and S 1 ft at 12 seconds. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Wednesday

      Wednesday:Variable winds 5 kt or less. Sunny. Mixed swell...W 5 ft at 13 seconds and S 1 ft at 12 seconds becoming SW. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Patchy fog.  Mixed swell...WNW 5 ft at 13 seconds and S 1 to 2 ft at 14 seconds. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Thursday

      Thursday:Variable winds 5 kt or less. Sunny. Mixed swell...W 5 to 6 ft and SSW 3 ft becoming SW. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. Patchy fog.  Mixed swell...WNW 6 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Friday

      Friday:Variable winds 5 kt or less. Patchy fog before 7am.  Mixed swell...W 5 ft and SSW 1 ft. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Patchy fog.  Mixed swell...W 4 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      3ft

    • Saturday

      Saturday:Variable winds 5 kt or less. Sunny. Mixed swell...W 3 to 4 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      3ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Patchy fog after 10pm.  Mixed swell...W 2 to 3 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      2ft


Associated Zone Forecast which includes this point

Last Update: 12:26 pm PST Dec 9, 2025
Forecast Valid: 10pm PST Dec 9, 2025-6pm PST Dec 16, 2025

View Nearby Observations

Detailed Forecast


Tonight
Variable winds 5 kt or less. Partly cloudy. Mixed swell...WNW 5 ft at 12 seconds and S 1 ft at 12 seconds. Wind waves 1 ft or less.
Wednesday
Variable winds 5 kt or less. Sunny. Mixed swell...W 5 ft at 13 seconds and S 1 ft at 12 seconds becoming SW. Wind waves 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Patchy fog. Mixed swell...WNW 5 ft at 13 seconds and S 1 to 2 ft at 14 seconds. Wind waves 1 ft or less.
Thursday
Variable winds 5 kt or less. Sunny. Mixed swell...W 5 to 6 ft and SSW 3 ft becoming SW. Wind waves 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Patchy fog. Mixed swell...WNW 6 ft and S 1 ft. Wind waves 1 ft or less.
Friday
Variable winds 5 kt or less. Patchy fog before 7am. Mixed swell...W 5 ft and SSW 1 ft. Wind waves 1 ft or less.
Friday Night
Variable winds 5 kt or less. Patchy fog. Mixed swell...W 4 ft and S 1 ft. Wind waves 1 ft or less.
Saturday
Variable winds 5 kt or less. Sunny. Mixed swell...W 3 to 4 ft and S 1 ft. Wind waves 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Patchy fog after 10pm. Mixed swell...W 2 to 3 ft and S 1 ft. Wind waves 1 ft or less.

*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: 38.25°N 122.97°W
Last Update: 12:26 pm PST Dec 9, 2025
Forecast Valid: 10pm PST Dec 9, 2025-6pm PST Dec 16, 2025
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