Los Angeles: Drying Out for Labor Day

By Brian Thompson, Meteorologist
August 30, 2013; 4:55 AM ET
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Bad news for folks hoping to attend the first day of the Los Angeles County Fair on Aug. 30; a plume of tropical moisture associated in part with leftover from tropical systems Juliette and Fernand has created well above-average humidity that will spin up some potentially severe storms.

The development of a strong storm cell on Thursday has created significant flooding for Riverside. Power was reportedly knocked out to 10,000 homes and businesses as heavy winds pushed over trees. The canal overflowed, causing closures of many roads as entire cars were submerged.

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AccuWeather.com Meteorologist Ken Clark said there was an atypically warm start to the weekend as lows Thursday night into Friday stayed in the 70s and 80s for much of Southern California. Dew points into the lower deserts and San Diego County valleys were at 73 degrees, higher than Florida or coastal Texas.

The moisture from former tropical systems Fernand and Juliette will likely spawn thunderstorms Friday night, some of which may be severe and bring the potential for flash flooding.

"There was a lot of flooding in Riverside, and there wasn't as much moisture as there will be today," Clark said.

Overall, the amount of moisture over Southern California through the atmosphere is even higher than over the Gulf Coast States, which is "highly unusual," according to Clark.

Thursday was very warm as the high hit 96 degrees across much of the L.A. Basin away from the coast. Downtown Los Angeles has not reached the 90-degree mark since July 1.

As the tropical moisture moves out of the area by the Labor Day weekend, the humidity will not be as high. Temperatures in and around Los Angeles will also not be quite as high, topping out closer to 80 degrees rather than 90 degrees.

Content contributed by AccuWeather.com Staff Writer Samantha-Rae Tuthill


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