National Weather Service United States Department of Commerce

Severe weather expected for Upper Midwest on Wednesday

A potent storm system will bring a chance of severe thunderstorms to parts of the Upper Midwest on Wednesday and Wednesday night. Very large hail, damaging wind gusts, tornadoes and heavy rain are possible with these storms.
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Last Update: 237 PM PDT TUE SEP 2 2014

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

Marine Zone Forecast





  • SynopsisNORTHWEST WINDS ARE DIMINISHING OVER THE COASTAL WATERS TODAY AS A THERM THROUGH DEVELOPS NEAR THE COAST.
  • Tonight SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds and SW 3 ft at 14 seconds. Patchy fog after midnight.
  • Wed S winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 10 seconds and SW 3 ft at 14 seconds. Patchy fog in the morning.
  • Wed Night S winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 10 seconds and SW 3 ft at 14 seconds. Patchy fog after midnight.
  • Thu S winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds and SW 3 to 4 ft at 21 seconds. Patchy fog in the morning.
  • Thu Night S winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds and SW 3 to 4 ft at 20 seconds. Patchy fog after midnight.
  • Fri SW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft and SW 3 to 5 ft. Patchy fog.
  • Sat W winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft and SW 3 to 5 ft. Patchy fog.
  • Sun W winds 10 kt. Wind waves 2 ft or less. Mixed swell NW 3 to 5 ft and SW 3 to 5 ft. Patchy fog.

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

    in the deep water channel...combined seas 4 to 5 feet with a dominant swell period of 12 seconds.

    across the bar...combined seas 4 to 6 feet with a dominant swell period of 12 seconds. Maximum ebb current of 1.7 knots at 09:41 pm tuesday and 1 knots at 11:42 am wednesday.




.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...COMBINED SEAS 4 TO 5 FEET WITH A DOMINANT SWELL PERIOD OF 12 SECONDS. ACROSS THE BAR...COMBINED SEAS 4 TO 6 FEET WITH A DOMINANT SWELL PERIOD OF 12 SECONDS. MAXIMUM EBB CURRENT OF 1.7 KNOTS AT 09:41 PM TUESDAY AND 1 KNOTS AT 11:42 AM WEDNESDAY.

Additional Forecasts and Information

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