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Cool, wet days ahead for Southern California with a short-lived storm on the way

May 3, 2023

Cooler temperatures have already arrived over Southern California with some light drizzle already touching down earlier this week, and a chance for more rain is on the way with some showers expected to fall as early as Tuesday evening.

A low pressure system was making its way across the region this week, with Los Angeles County looking to be the first stop on its path, according to National Weather Service meteorologist Lisa Phillips.

“We already have some showers moving in to the northern parts of (Southern California),” Phillips said. “And when the low pressure system gets here, it’s just kind of going to sit over us for awhile.”

The bulk of the rain is expected to arrive Wednesday afternoon into Thursday, but some overnight showers on Tuesday were possible.

In the mountains and foothills of Los Angeles County, temperatures will stick to the low 60s for most of the week with about an inch of rain expected to drop over the area.

Along the coastal communities in Los Angeles and Orange counties, temperatures will be much of the same, sticking to the low 60s with a little under half an inch of rain expected to fall.

Clouds roll past a cyclist along the Old Iron Horse Trail in Santa Clarita, CA, Monday, May 1, 2023. Cooler temperatures, rain and even mountain snow are in the forecast for the week. (Photo by David Crane, Los Angeles Daily News/SCNG)

A woman walks in Altadena on Monday morning during a light rain on May 1, 2023. (Photo by Dean Musgrove, Los Angeles Daily News/SCNG)

It’s May gray as a sailboat travels on the horizon and a surfer approaches the shoreline in Torrance on Monday, May 1, 2023. (Photo by Brittany Murray, Press-Telegram/SCNG)

May gray skies over downtown Los Angeles seen from Glendale on May 1, 2023. (Photo by Dean Musgrove, Los Angeles Daily News/SCNG)

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Heading more inland in Orange County in cities like Fullerton and Anaheim, about a third to a half an inch of rain is expected to drop, said NWS meteorologist Stefanie Sullivan.

In San Bernardino County, cities including Fontana and Ontario will see about a quarter to a third of an inch of rain, with temperatures dipping into the low 60s and high 50s by Thursday before climbing back into the mid 60s by Friday.

Heading up to the San Bernardino Mountains, the system will also bring the chance of more snow, though nothing like the rare blizzard that blanketed the area earlier this year. The system is expected to arrive Wednesday evening and into Thursday, bringing about an inch to two inches of snow over communities like Big Bear and Lake Arrowhead, with a quarter to half an inch of rain falling lower down the mountains, Sullivan said.

“There is a small chance of some thunderstorms over the mountains,” Sullivan said.

Riverside County will see precipitation similar to San Bernardino with about a quarter of an inch of rain and temperatures in the low to mid 60s in cities including Moreno Valley and Murrieta.

The system will be on the move again by Friday, though there will still be a chance for some lingering showers.

After the rain is gone, the region will warm a little but will likely remain in the low to mid 60s, Phillips said.

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Cool, wet days ahead for Southern California with a short-lived storm on the way

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