National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the West Coast through Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Last Update: 211 PM PST SAT DEC 20 2014

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Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm

Marine Zone Forecast

...SMALL CRAFT ADVISORY FOR ROUGH BAR IN EFFECT THROUGH SUNDAY
EVENING......SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT UNTIL 3 PM
PST THIS AFTERNOON...


  • SynopsisLARGE LONG PERIOD SWELLS WILL BEGIN TO DIMINISH THROUGH THE AFTERNOON AND EVENING. LARGE BREAKING WAVES WILL REMAIN A POSSIBILITY ACROSS THE SAN FRANCISCO BAR AND OFFSHORE REEFS AND ROCK OUTCROPPINGS THROUGH THE REMAINDER OF THE DAY. HIGH PRESSURE WILL BUILD OFF THE CALIFORNIA COAST TONIGHT INTO EARLY NEXT WEEK RESULTING IN INCREASING NORTHWEST WINDS OVER THE SOUTHERN WATERS BEGINNING SUNDAY. ADDITIONALLY... THE KING TIDES WILL IMPACT THE COAST AND INLAND BAYS OVER THE NEXT THREE DAYS. KING TIDE IMPACTS FOR SEAFARING VESSELS WILL OCCUR PRIMARILY DURING LOW TIDES... WITH THE POSSIBILITIES OF BOAT KEELS TOUCHING HARBOR BOTTOM... STRONG CURRENTS IN HARBOR ENTRANCES... AND ADDITIONAL BREAKING WAVES OVER OFFSHORE REEFS.
  • Tonight SW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 9 to 12 ft at 16 seconds. Chance of showers.
  • Sun NW winds 10 kt. Wind waves 2 ft or less. W swell 8 to 10 ft at 14 seconds.
  • Sun Night NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 10 ft at 14 seconds.
  • Mon NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 10 ft at 13 seconds.
  • Mon Night NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 9 to 11 ft at 13 seconds.
  • Tue N winds 10 kt. Wind waves 2 ft or less. W swell 9 to 11 ft.
  • Wed NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft. Slight chance of rain.
  • Christmas Day N winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 12 ft...decreasing to 7 to 9 ft.

    .....san francisco bar/fourfathom bank forecast.....

    in the deep water channel...combined seas 12 to 14 feet with a dominant swell period of 17 seconds...becoming 11 to 13 feet with a period of 16 seconds tonight.

    across the bar...combined seas 14 to 17 feet with a dominant period of 17 seconds...becoming 12 to 15 feet with a period of 16 seconds tonight. Occasional breakers 18 to 24 feet through daylight hours. Maximum ebb current of 1.1 knots at 02:42 am sunday and 2.8 knots at 02:15 pm sunday.



Additional Forecasts and Information

Zone Area Forecast for Coastal Waters from Point Reyes to Pigeon Point California out to 10 nm
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