National Weather Service United States Department of Commerce

Flash flooding possible across parts of Midwest

Showers and thunderstorms ahead of a strong cold front moving across the Midwest on Friday are expected to produce rainfall rates of 1-2 inches per hour, creating a risk of flash flooding across parts of southern Minnesota and northern and central Iowa. The flash flooding risk will continue into Saturday and move eastward, into the Ohio Valley.
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38NM WNW San Francisco CA

Marine Point Forecast [NOTICE]

Today

Sunny

NW 13kt
5ft

Tonight

Clear

NW 14kt
5-6ft

Saturday

Sunny

Winds IncreasingWNW 7kt
4-5ft

Saturday
Night

Increasing Clouds

WNW 9kt
4-5ft

Sunday

Partly Sunny

Light Wind
4ft

Sunday
Night

Patchy Fog

WNW 8kt
4ft

Monday

Patchy Fog

Light Wind
4ft

Monday
Night

Patchy Fog

WNW 10kt
3ft

Tuesday

Patchy Fog

W 6kt
3ft

Associated Zone Forecast which includes this point

Last Update: 4:26 am PDT Jul 25, 2014
Forecast Valid: 11am PDT Jul 25, 2014-6pm PDT Jul 31, 2014

View Nearby Observations

Detailed Forecast

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

  • SynopsisWINDS OVER THE COASTAL WATERS WILL DECREASE TODAY AS THE SURFACE PRESSURE GRADIENT WEAKENS. LIGHT WINDS AND SEAS WILL CONTINUE THROUGH THE WEEKEND EXCEPT MODERATE NORTHWEST OVER THE NORTHERN OUTER WATERS.
  • Today NW wind 9 to 13 kt. Sunny. Mixed swell...WNW 5 ft at 9 seconds and SW 1 ft at 17 seconds. Wind waves 1 to 2 ft.
  • Tonight NW wind 8 to 14 kt. Clear. Mixed swell...WNW 5 ft at 9 seconds and SW 1 ft at 16 seconds. Wind waves 1 to 2 ft.
  • Saturday Variable winds less than 5 kt becoming WNW 5 to 7 kt in the afternoon. Sunny. Mixed swell...WNW 4 to 5 ft at 8 seconds and SW 1 ft at 16 seconds. Wind waves around 1 ft.
  • Saturday Night WNW wind 6 to 9 kt. Increasing clouds. Mixed swell...WNW 4 to 5 ft and SSW 1 ft. Wind waves around 1 ft.
  • Sunday Variable winds 5 kt or less. Partly sunny. Mixed swell...WNW 3 ft and SW 1 ft. Wind waves around 1 ft.
  • Sunday Night WNW wind 5 to 8 kt. Patchy fog after 11pm. Mixed swell...WNW 4 ft and SW 1 ft. Wind waves around 1 ft.
  • Monday Variable winds 5 kt or less. Patchy fog before 11am. Mixed swell...WNW 3 to 4 ft and SW 1 ft. Wind waves around 1 ft.
  • Monday Night WNW wind 7 to 10 kt. Patchy fog after 11pm. Mixed swell...WNW 3 ft and SSW 1 ft. Wind waves around 1 ft.
  • Tuesday W wind around 6 kt. Patchy fog before 11am. Mixed swell...WNW 3 ft and S 1 ft. Wind waves around 1 ft.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...COMBINED SEAS 4 TO 6 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 1.2 KNOTS AT 03:57 PM FRIDAY AND 2 KNOTS AT 04:02 AM SATURDAY.

*Notices:
  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.