Heavy rain threat continues through Saturday from the Ohio Valley to the Mid-Atlantic and the Northeast. Scattered showers and thunderstorms will be possible over the Southwest and Rockies.

Widespread showers and thunderstorms will continue over much of the Mid-Atlantic, Northeast and the Ohio valley through the weekend. The central Appalachians and the lower Great Lakes/Ohio valley will likely have the higher rainfall amounts. Showers and thunderstorms will be possible this weekend as well from the desert southwest/southern Rockies northward to the northern Rockies and High Plains.
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Last Update: 832 PM PDT FRI SEP 30 2016

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23NM SSW San Francisco CA

Marine Zone Forecast


Synopsis: GREATER FARALLONES...AND CORDELL BANK NATIONAL MARINE SANCTUARIES...

GENERALLY A WEAK SURFACE PRESSURE GRADIENT HAS RESULTED IN ONLY LIGHT TO MODERATE WINDS FOR MOST OF THE COASTAL WATERS TODAY. HOWEVER...AN INVERTED SURFACE TROUGH ALONG THE MONTEREY COUNTY COASTLINE IS CAUSING A STRONGER PRESSURE GRADIENT AND THUS STRONGER WINDS IN THE AREA. SUSTAINED WIND SPEEDS OF 15 TO 25 KT ARE LIKELY...WITH POSSIBLE GALE FORCE WIND GUSTS OF 40 KT...ESPECIALLY ALONG THE MONTEREY COUNTY COASTLINE...THROUGH SATURDAY. WINDS WILL EASE BY SUNDAY AS UPPER LEVEL RIDGING BUILDS BACK IN OVER THE REGION. A SMALL MIXED SWELL WITH A LONG PERIOD SOUTHERLY SWELL WILL CONTINUE THROUGH THE PERIOD.

Tonight
NW winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell NW 4 to 6 ft at 9 seconds and S 3 ft at 15 seconds.
Sat
NW winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell NW 3 to 5 ft at 10 seconds and S 3 ft at 16 seconds.
Sat Night
NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft at 10 seconds and S 3 ft at 16 seconds.
Sun
W winds 10 kt. Wind waves 2 ft or less. Mixed swell NW 4 to 6 ft at 10 seconds and S 3 ft at 15 seconds. Slight chance of showers in the morning...then chance of showers and slight chance of thunderstorms in the afternoon.
Sun Night
W winds 10 kt. Wind waves 2 ft or less. Mixed swell NW 4 to 6 ft at 9 seconds and S 3 ft at 15 seconds. Slight chance of thunderstorms in the evening...then slight chance of showers after midnight.
Mon
SW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft. Slight chance of showers.
Tue
W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
Wed
NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft...increasing to 6 to 8 ft. .....san francisco bar/fourfathom bank forecast..... in the deep water channel...NW seas 2 to 3 feet at 8 seconds and S seas 2 to 3 feet at 15 seconds. across the bar...NW seas 3 to 5 feet at 8 seconds and S seas 2 to 3 feet at 15 seconds. Maximum ebb current of 2.2 knots at 05:31 am saturday and 3.1 knots at 05:49 pm saturday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...NW SEAS 2 TO 3 FEET AT 8 SECONDS AND S SEAS 2 TO 3 FEET AT 15 SECONDS. ACROSS THE BAR...NW SEAS 3 TO 5 FEET AT 8 SECONDS AND S SEAS 2 TO 3 FEET AT 15 SECONDS. MAXIMUM EBB CURRENT OF 2.2 KNOTS AT 05:31 AM SATURDAY AND 3.1 KNOTS AT 05:49 PM SATURDAY.
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ABOUT THIS FORECAST

Last Update: 832 PM PDT FRI SEP 30 2016
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