National Weather Service United States Department of Commerce

Severe weather possible for parts of northern Plains

The NWS Storm Prediction Center is forecasting a risk of severe thunderstorms Tuesday afternoon and evening across portions of the northern Plains, from extreme south-central North Dakota into eastern South Dakota. Isolated severe thunderstorms capable of hail and locally-strong wind gusts are possible.
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Last Update: 222 PM PDT TUE SEP 30 2014

View Nearby Observations

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

Marine Zone Forecast





  • SynopsisMODERATE NORTHWEST WINDS WILL CONTINUE OVER THE COASTAL WATERS THROUGH TOMORROW. WINDS BECOME LIGHT WEDNESDAY NIGHT THROUGH THE REST OF THE WEEK AS HIGH PRESSURE BUILDS OVER THE GREAT BASIN.
  • Tonight NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 6 to 8 ft at 10 seconds and SW 3 ft at 15 seconds.
  • Wed NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 10 seconds and SW 3 ft at 15 seconds.
  • Wed Night NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 10 seconds.
  • Thu NE winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 9 seconds and SW 3 to 4 ft at 19 seconds.
  • Thu Night NW winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft at 8 seconds and SW 3 to 5 ft at 19 seconds.
  • Fri NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 2 to 4 ft and SW 3 to 5 ft.
  • Sat NW winds 10 kt. Wind waves 2 ft or less. W swell 4 to 6 ft and SW 3 to 5 ft.
  • Sun W winds 5 kt. Wind waves 2 ft or less. W swell 3 to 5 ft and SW 3 to 4 ft.

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

    in the deep water channel...combined seas 3 to 5 feet with a dominant swell period of 9 seconds.

    across the bar...combined seas 4 to 6 feet with a dominant swell period of 9 seconds. Maximum ebb current of 2.1 knots at 08:00 pm tuesday and 1 knots at 10:16 am wednesday.




.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...COMBINED SEAS 3 TO 5 FEET WITH A DOMINANT SWELL PERIOD OF 9 SECONDS. ACROSS THE BAR...COMBINED SEAS 4 TO 6 FEET WITH A DOMINANT SWELL PERIOD OF 9 SECONDS. MAXIMUM EBB CURRENT OF 2.1 KNOTS AT 08:00 PM TUESDAY AND 1 KNOTS AT 10:16 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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