Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic.
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Last Update: 259 AM PDT Thu Jul 20 2017

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Los Angeles/Oxnard, CA Local Forecast Office

27NM WSW San Luis Obispo CA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT...

Synopsis: PZZ600-201715- 259 AM PDT Thu Jul 20 2017 .Synopsis for the southern California coast and Santa Barbara Channel including the Channel Islands National Marine Sanctuary and National Park...at 09Z...or 2 AM PDT...A 1025 MB high was 600 NM miles NW of Pt. Conception and a 1008 MB low was near Las Vegas. $$

Today
NW winds 15 to 25 kt with local gusts to 30 kt. Strongest western portion. Combined seas 7 to 8 ft dominant period 8 seconds. Patchy fog in the morning.
Tonight
NW winds 20 to 30 kt with local gusts to 35 kt. Combined seas 7 to 8 ft dominant period 8 seconds. Patchy fog after midnight.
Fri
NW winds 20 to 30 kt. Strongest western portion. Combined seas 7 to 8 ft dominant period 8 seconds. Patchy fog in the morning.
Fri Night
NW winds 15 to 25 kt with gusts to 35 kt. Combined seas 8 to 9 ft dominant period 8 seconds. Patchy fog after midnight.
Sat
NW winds 15 to 25 kt with gusts to 30 kt. Combined seas 8 to 9 ft dominant period 8 seconds. Patchy fog in the morning.
Sat Night
NW winds 10 to 20 kt with gusts to 25 kt. Wind waves 2 to 4 ft. NW swell 5 to 6 ft. Patchy fog after midnight.
Sun
NW winds 15 to 20 kt. Combined seas 5 to 7 ft. Patchy fog.
Mon
NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft. Patchy fog.
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ABOUT THIS FORECAST

Last Update: 259 AM PDT Thu Jul 20 2017
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