National Weather Service United States Department of Commerce

Severe thunderstorms possible this evening and tonight

Large hail and damaging winds may occur from eastern Montana into North Dakota. Strong storms are also possible over the southern mid-Atlantic states. Hot weather continues across the southern Plains to Arizona.
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Last Update: 235 PM PDT THU JUL 24 2014

View Nearby Observations

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

Marine Zone Forecast

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST.....



  • SynopsisA BROAD THERMAL TROUGH CENTERED OVER INTERIOR CALIFORNIA WILL MAINTAIN MODERATE NORTHWESTERLY WINDS ACROSS THE COASTAL WATERS TONIGHT...GENERATING STEEP CHOPPY SEAS. WINDS WILL DECREASE LATE FRIDAY MORNING AS THE THERMAL TROUGH SLIDES WEST...WEAKENING THE SURFACE PRESSURE GRADIENT. WITH THE EXCEPTION OF THE NORTHERN OUTER COASTAL WATERS GENERALLY LIGHT WINDS AND GENTLE SEAS ARE EXPECTED FOR THE WEEKEND.
  • Tonight NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft at 8 seconds.
  • Fri NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 9 seconds.
  • Fri Night W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 9 seconds.
  • Sat S winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds.
  • Sat Night W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 8 seconds.
  • Sun Through Tue W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft. Patchy fog.

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

    in the deep water channel...combined seas 5 to 7 feet with a dominant swell period of 8 seconds.

    across the bar...combined seas 5 to 7 feet with a dominant swell period of 8 seconds. Maximum ebb current of 1.2 knots at 03:07 pm this afternoon and 2.1 knots at 03:14 am friday morning.




.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...COMBINED SEAS 5 TO 7 FEET WITH A DOMINANT SWELL PERIOD OF 8 SECONDS. ACROSS THE BAR...COMBINED SEAS 5 TO 7 FEET WITH A DOMINANT SWELL PERIOD OF 8 SECONDS. MAXIMUM EBB CURRENT OF 1.2 KNOTS AT 03:07 PM THIS AFTERNOON AND 2.1 KNOTS AT 03:14 AM FRIDAY MORNING.

Additional Forecasts and Information

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