Downtown Los Angeles in the heat
A hazy day in downtown Los Angeles. Photo courtesy Emergency Management Department

It’s about to get a lot warmer in much of the Southland, with forecasters predicting triple-digit heat in parts of the area into the weekend, thanks to a developing high-pressure system.

“There will be significant warming across the area through Saturday, with triple-digit heat likely across the valleys and deserts,” according to the National Weather Service. “Skies will be mostly clear except for areas of morning low clouds at the coast. There will be a slight chance of thunderstorms over the eastern San Gabriel mountains and adjacent portions of the Antelope Valley each afternoon Friday through Sunday.”

Forecasters said the heat is the result of a high-pressure system covering the southwestern United States moving toward the west. The result will be daily high temperatures in the 90s and low 100s in valley and interior areas.

Along the coast, morning clouds will help keep things cooler, but temperatures will still be slightly above normal for the next few days.

Humidity levels are expected in the 10% to 25% range, and combined with 20 to 30 mph winds, there will be “elevated” fire conditions in some Los Angeles County mountain areas and the Antelope Valley into Saturday, according to the NWS.

Monsoonal moisture, meanwhile, will create a slight chance of some afternoon thunderstorms in the eastern San Gabriel mountains. Forecasters said such thunderstorms are most likely on Friday afternoon.

Temperatures should begin to cool by early next week, according to the NWS.

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