Dangerous Heat and Humidity Building from the Plains to the East Coast

A strengthening ridge of high pressure will produce much above average temperatures from the Plains to the East Coast, a true summer heat wave. Highs in the 90s and triple digits combined w/ humidity and dewpoints surging into the upper 70s, if not low 80s, will create heat indices as high as 110 to 115 through this weekend. Air quality will likely be poor due to haze and little air circulation.
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Last Update: 314 AM PDT Thu Jul 18 2019

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12NM N San Francisco CA

Marine Zone Forecast


...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM PDT THIS MORNING THROUGH THIS EVENING...
Synopsis: PZZ500-182245- 314 AM PDT Thu Jul 18 2019 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Light to moderate northwest winds will continue through Monday except for light south wind along the near shore waters south of the the Wind flow in the near term is from the south from the Golden Gate south. Light long period southerly swell will continue as well. $$

Today
SW winds 15 to 25 kt with gusts up to 30 kt.
Tonight
SW winds 10 to 15 kt with gusts up to 25 kt.
Fri
SW winds 10 to 20 kt with gusts up to 25 kt.
Fri Night
SW winds 10 to 15 kt.
Sat
SW winds 10 to 20 kt with gusts up to 25 kt.
Sat Night
SW winds 10 to 15 kt.
Sun
SW winds 10 to 15 kt.
Mon
SW winds 10 to 15 kt.
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ABOUT THIS FORECAST

Last Update: 314 AM PDT Thu Jul 18 2019
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RADAR & SATELLITE IMAGES

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