National Weather Service United States Department of Commerce

Severe weather possible for parts of northern, central Plains and Upper Midwest, as well as parts of OH, TN Valleys and Southeast

The NWS Storm Prediction Center is forecasting a risk of severe thunderstorms Wednesday afternoon and evening for two areas: one covering parts of the northern & central Plains and Upper Midwest; and the other area covering parts of the Tenn. & Ohio Valleys and Southeast. Large hail & damaging winds will be the main threats, but there is a possibility of tornadoes for the Plains/Midwest area.
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Last Update: 214 PM PDT WED AUG 20 2014

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San Pablo Bay-Suisun Bay-the West Delta and the San Francisco Bay North of the Bay Bridge

Marine Zone Forecast




...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM PDT THIS EVENING...

  • SynopsisMODERATE NORTHWESTERLY WINDS EXPECTED ACROSS THE NORTHERN OUTER WATERS TONIGHT AND OVER PORTIONS OF SAN FRANCISCO BAY THIS AFTERNOON. OTHERWISE GENERALLY LIGHT WINDS AND SEAS WILL CONTINUE. A MODERATE PERIOD SOUTH SWELL WILL MOVE INTO THE REGION LATER THIS WEEK DUE TO STORMS IN THE TROPICAL PACIFIC.
  • Tonight SW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Patchy fog after midnight.
  • Thu W winds 10 kt...becoming SW 10 to 20 kt in the afternoon. Patchy fog in the morning.
  • Thu Night SW winds 5 to 15 kt. Patchy fog after midnight.
  • Fri SW winds 5 to 15 kt. Patchy fog in the morning.
  • Fri Night SW winds 10 to 20 kt.
  • Sat SW winds 10 to 20 kt.
  • Sun SW winds 5 to 15 kt.
  • Mon SW winds 5 to 15 kt.



Additional Forecasts and Information

Zone Area Forecast for San Pablo Bay-Suisun Bay-the West Delta and the San Francisco Bay North of the Bay Bridge
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