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Antelope Valley may approach record-breaking heat this week, Inland Empire to see triple digits

Hot days and nights will have Antelope Valley cities approaching record-breaking territory Tuesday while the residual effects of the heat will be felt throughout inland Southern California, meteorologists said Monday, Aug. 22.

An excessive heat warning is in place for the Antelope Valley on Tuesday with temperatures expected to be as high as 108 degrees, the National Weather Service said.

Through a combination of triple-digit daytime temperatures and nightly lows hovering around the high 70s, Lancaster and Palmdale are facing a “probable” scenario where their decades-old daily high records will be tied, if not exceeded by a few degrees, said Joe Sirard, a meteorologist for the NWS. Lancaster reached a record daily high of 107 in 1945 while Palmdale peaked at 103 in 1964, Sirard said.

“High overnight lows are the recipe to records being broken,” Sirard said. “I’d say there’s a pretty high probability of (Palmdale and Lancaster’s daily high records) at least being tied, if not broken.”

Parts of the lower-elevation mountain areas of Los Angeles County, such as Sandberg, are expected to reach record-breaking territory as well, Sirard said. Sandberg set a daily high record of 96 degrees in 1991, Sirard said.

Thanks to an onshore flow, most of the rest of Los Angeles County will be spared the excessive heat, but hot weather is still anticipated, Sirard said.

The Santa Clarita Valley can expect high temperatures Tuesday around 102 degrees while much of the San Fernando Valley is expected to hang around the low-to-mid 90s, Sirard said.

“It’s going to be hot in the LA County valleys, not excessively hot though,” Sirard said.

In the Riverside County, triple-digit heat is expected for areas like Lake Elsinore and Hemet, where highs of 101 degrees are anticipated, said Dan Gregoria, meteorologist with the NWS. San Bernardino is projected to reach a high mark of 101 as well Tuesday, with Redlands expected to top out at 100 degrees, according to the NWS.

In Orange County, highs are expected to be in the mid-80s for inland areas while the coast will remain around the 70-degree range, Gregoria said.

The temperature increase is expected to subside Wednesday throughout most of the region, moving into a gradual cooling pattern through the weekend, Gregoria said.

Some monsoonal activity is expected Tuesday in the San Bernardino and Riverside county mountains, Gregoria said. But the bulk of potential heavy precipitation is expected for Wednesday, Aug. 24, and Thursday, Aug. 25, he said.

Forecasted temperatures for Tuesday:

— Downtown Los Angeles: 87

— Fullerton: 88

— Long Beach: 82

— Anaheim: 86

— Mission Viejo: 87

— Pomona: 95

— Redlands: 100

— Riverside: 98

— San Bernardino: 101

— Lake Elsinore: 101

— Torrance: 79

— Van Nuys: 100

— Whittier: 91

— Pasadena: 92

Source: National Weather Service

Source: Orange County Register

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