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Cooler weather ahead for Southern California

A low pressure system will be moving into Southern California, bringing cooler temperatures starting Friday, Oct. 21.

Certain areas might see rain over the weekend too.

There is a 10% to 30% chance of rain this weekend in Los Angeles County, according to the National Weather Service in Oxnard, which covers Los Angeles County.

In Orange County and the Inland Empire, the chance of rain is around 40% to 50% mainly on Saturday afternoon to Saturday night, said Brandt Maxwell, a meteorologist with the National Weather Service in San Diego, which covers those areas.

It will be mostly showers. Heavy rain is not common this time of year, he said.

“Usually October is mostly dry in Southern California,” Maxwell said.

Wednesday brought heat that tied or set records in the region, with the NWS saying LAX reached 94 degrees, beating the daily record of 93 set in 1981; while Anaheim’s high of 99 broke its daily record of 93 set in 2016.

Thursday will be a warm day, but weather experts don’t expect any records to be broken.

In Los Angeles County, the valleys are expected to see high temperatures in the upper 80s to low 90s; and the beaches should see highs in the 80s, meteorologist Mark Jackson said.

Friday will usher in cooler temperatures.

The beach areas will be in the upper 60s, Jackson said. The valleys will see temperatures in the lower to mid 80s, the mountains in the 60s to 70s and the desert mainly in the 70s, he added.

By Saturday and Sunday, Jackson said the beaches will be in the 60s with temperatures in the 70s in the valleys, low 70s in the desert and 50s to 60s in the mountains.

On Thursday, Orange County will be in the mid 80s to lower 90s while most areas in Riverside County will see high temperatures between 88 and 94, and Ontario and San Bernardino in San Bernardino County are expected to reach 90, Maxwell said.

Desert areas will be in 80s while the mountain areas in the Inland Empire will be in 60s and 70s, he said.

The low pressure system that will usher in cooler weather is coming from the Northeast Pacific, Maxwell said.

High temperatures on Friday will reach around the 80s in Orange County, 70s in the beach areas and mid to upper 80s in the Inland Empire, he said. The mountain areas in the Inland Empire will be mostly in the 70s, he added.

It will be a lot cooler over the weekend, he said.

On Saturday, it will be mostly in the lower 70s in Orange County and the Inland Empire, he said. The desert areas in San Bernardino County will reach highs in the 70s to 80s. The mountain areas will be in the 50s and 60s. The beach areas in Orange County will be between 65 and 70.

Temperatures will drop further on Sunday. Meteorologist Dan Gregoria said the highs for Orange County and the Inland Empire will be between 65 and 70. It will be around 65 degrees along the beaches and 40s to near 50s in the mountains, he said.

Staff writer Hunter Lee contributed to this story.

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