The National Weather Service is predicting a hot, muggy thunderstorm heading toward the Southland at the beginning of the week. Image courtesy of the NSW
The National Weather Service is predicting a hot, muggy thunderstorm heading toward the Southland at the beginning of the week. Image courtesy of the NSW

New heat records were set in the Southland on Sunday, but that will change as Southern California’s inland deserts and mountains — but not Los Angeles itself — may get drenched by one to two inches of rain in the next three days. Los Angeles and Orange County are expected to get at least some rain by late Monday.

Record high temperatures were set Sunday in both Woodland Hills, which reached 104, and Long Beach, which hit 99, a record for the date. Although not records, Burbank reached 104 and the 3 p.m. temperature in Woodland Hills was a scorching 108. Fullerton and Van Nuys both registered 103 at 3 p.m. It was 105 in Palm Springs at the same time.

But this will change as heavy rain and possible flash flooding are predicted to start Monday and continue Tuesday in inland San Diego County, and the Riverside County deserts south of Interstate 10. Los Angeles itself will not see rain until late Monday, National Weather Service forecasters said.

A low pressure system and deep trough of moisture appeared poised to come ashore Monday, due to the combination of deep moisture and an approaching system of upper-level low pressure, moving counterclockwise 500 miles southwest of San Diego.

But the storms were only expected to brush Los Angeles and Orange counties.

“It’s going to be hit and miss for Los Angeles, and there will be a 20- to-40 percent chance of rain here,” said NWS meteorologist David Sweet. He told City News Service “the heavy stuff is going to be to the south and east.”

NWS forecasters in San Diego said lower-elevation places like the Coachella Valley might experience 1/2 inch of rain, while mountains will get 1 inch and up to 2 inches are possible.

Despite the heavy rain, the system will not be a cold one. In fact, highs on the San Diego coastline were predicted to be in the mid-80s.

“It will be closer to Florida weather,” meteorologist James Thomas said. “We should expect a muggy system.”

Similar conditions occurred in July, when record-breaking thunderstorms hit Riverside and San Diego counties and washed out a freeway bridge east of Indio. Ramona received more than 2 inches of rain and flash-floods wreaked havoc on the town’s streets.

Thomas advised that residents in the heavy-rain regions monitor the latest NWS updates and to be prepared to take action.

— City News Service

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