Dangerous Heat Building in the West; Severe Storms in the Upper Midwest

A long duration heat wave will build across the Southwest, California, and Pacific Northwest. Dangerous heat is also forecast for the Great Basin and South Plains. Severe storms in the Upper Midwest may have locally heavy rain, damaging winds, and very large hail. Heavy rain and flooding will also be possible in the Deep South and Appalachians.
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Last Update: 814 PM PDT Thu Aug 13 2020

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12NM SW San Francisco CA

Marine Zone Forecast


Synopsis: PZZ500-141615- 814 PM PDT Thu Aug 13 2020 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Remnant tropical moisture will bring a chance of thunderstorms to the southern waters into this evening. Locally gusty winds, rough seas, and frequent lightning with some of these cells will be possible. Otherwise, generally light to moderate northwest winds across the waters through the weekend aside from locally breezy winds over the northern outer waters into this evening. Mixed seas will persist through the period with a short period northwest swell and two longer period southerly swells. $$

Tonight
NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 13 seconds. A slight chance of showers and thunderstorms this evening.
Fri
NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 17 seconds.
Fri Night
W winds 5 to 15 kt. Wind waves 1 to 2 ft. Mixed swell NW 2 to 4 ft at 8 seconds and S around 2 ft at 18 seconds.
Sat
NW winds 5 to 10 kt. Wind waves 1 to 2 ft. NW swell 2 to 4 ft at 9 seconds.
Sat Night
NW winds 5 to 15 kt. Wind waves 1 ft. NW swell 2 to 3 ft at 9 seconds.
Sun
NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. NW swell 2 to 3 ft at 10 seconds and SW around 2 ft at 17 seconds.
Sun Night
NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 9 seconds and SW around 2 ft at 18 seconds.
Mon
NW winds 10 to 20 kt. Wind waves 2 to 3 ft. NW swell 4 to 6 ft and SW around 2 ft.
Tue
NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft and SW around 2 ft. winds and wind waves higher in and near thunderstorms. .....san francisco bar/fourfathom bank forecast..... in the deep water channel...seas 4 to 6 ft with dominant swell period of 10 seconds. across the bar...seas 5 to 7 ft with dominate swell period of 10 seconds. Maximum ebb current of 2.2 kt at 12:49 am friday and 1.0 kt at 02:01 pm friday.

Winds and wind waves higher in and near thunderstorms. .....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Seas 4 to 6 ft with dominant swell period of 10 seconds. ACROSS THE BAR...Seas 5 to 7 ft with dominate swell period of 10 seconds. Maximum ebb current of 2.2 kt at 12:49 AM Friday and 1.0 kt at 02:01 PM Friday.
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ABOUT THIS FORECAST

Last Update: 814 PM PDT Thu Aug 13 2020
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