Rain or thunderstorms are expected in the L.A. basin and valley on Tuesday

Cooler temperatures — and maybe some showers — headed to SoCal this weekend.

A weak storm system could bring a string of showers or thunderstorms to parts of the region this weekend, forecasters said Wednesday morning.

The National Weather Service in Oxnard has issued a warning for rain and a storm warning for storms to develop in the area at 11 p.m. Saturday through midnight Sunday.

That’s the most likely time to see any fall weather in the area, since a cold front, low pressure system and cold air will all be present, meteorologists said.

A high pressure system and upper-level high will bring in the first rain showers to the region that afternoon. A warm front is expected to move into the area around 7 p.m. and bring in some rain to the region by 9 p.m.

As the system passes through the area by the end of the weekend, some showers — if not a few, if not a lot — could build.

The National Weather Service said a slight chance of showers or thunderstorms — a risk of 0 percent — is currently forecast to develop in the area Sunday night.

An inch of rain is expected in the hills of Santa Clarita, and a half-inch is expected in the hills of San Jacinto, according to NWS.

It could also bring in a few light to moderate showers and thunderstorms in the L.A. basin to the east of the San Fernando Valley on Monday, according to forecasters.

A slight chance of showers or thunderstorms — a risk of zero percent — is expected to develop.

A cold front will move northeastward through the region on Monday, bringing with it some rain.

The rain could turn into a few showers on Tuesday, forecasters said.

A high pressure system will pass through the area Tuesday evening and Wednesday morning, bringing some rain showers, but with the risk of a thunderstorm or light rain.

It will also bring with it a high risk of rain or snow in the mountains above the San Bernardino Front by Thursday morning.

A shower or shower is expected in parts of the L.A. basin and valley on Thursday, according to the NWS.

A low to medium risk of rain or snow — and an extremely high risk of heavy rain — is forecast for the mountains

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