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Thunderstorms prompt flash flood warnings for Riverside, San Bernardino counties

The Desert Sun (Palm Springs) logo The Desert Sun (Palm Springs) 9/10/2021 Matt Solinsky, Palm Springs Desert Sun
a close up of smoke: Lightning dances in the sky as an American flag flutters in the gusty winds atop the Journal Communications building Thursday in downtown Milwaukee. Researchers using a new satellite have found that lightning strikes over land, as opposed to water, about 90 percent of the time. AP Photo © Provided by The Desert Sun (Palm Springs) Lightning dances in the sky as an American flag flutters in the gusty winds atop the Journal Communications building Thursday in downtown Milwaukee. Researchers using a new satellite have found that lightning strikes over land, as opposed to water, about 90 percent of the time. AP Photo

Thunderstorms over the mountains across southern California were prompting flash flood warnings on Thursday afternoon.

The National Weather Service in San Diego has issued a flash flood warning for portions of Riverside County until 7:45 p.m.

Some locations that could experience flash flooding include northwestern Palm Springs, Hwy 243 between Banning and Idyllwild, Idyllwild-Pine Cove, Mt San Jacinto State Park, Hemet, San Jacinto, Beaumont, Banning, Cabazon, Hwy 74 between Hemet and Mountain Center, Valle Vista, Mountain Center, Whitewater, Calimesa, Saboba Indian Reservation and Morongo Indian Reservation.

The weather service advised at 4:33 p.m. that thunderstorms were producing heavy rain across the warned area. Between one and three inches of rain have fallen in some mountain areas.

In addition, the weather service issued a severe thunderstorm warning for parts of San Bernardino and Riverside counties until 5:30 p.m.

At 4:34 p.m., a severe thunderstorm was located near Beaumont, or 7 miles south of Yucaipa, moving northwest at 20 mph. The storm was producing 60 mph wind gusts and nickel size hail.

Some locations impacted include  Moreno Valley, Redlands, Yucaipa, Highland, Colton, Beaumont, Banning, Loma Linda, Mentone and Calimesa.

Afternoon thunderstorms are expected again on Friday across the mountain areas, but little rainfall is expected to affect the Coachella Valley.

The weather service forecasts the hot and humid conditions to continue through the weekend with temperatures peaking near 110 degrees in Palm Springs on Sunday. The humidity will drop significantly by Monday and forecast highs are expected to drop into the low 100s by midweek.

This article originally appeared on Palm Springs Desert Sun: Thunderstorms prompt flash flood warnings for Riverside, San Bernardino counties

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