A storm produced by a strong cold front meeting an atmospheric river is expected to hit Southern California over Easter weekend, bringing the potential of heavy rainfall.

Latest updates: See the forecast here

Here’s a look at the rain timeline, what the different parts of Southern California could see and the concerns coming with this storm.

When will it rain in Southern California?

The storm has already moved into the Los Angeles area, and by 2:30 a.m. to 5:30 a.m. Saturday, the storm will be in pretty much all parts of Southern California. By 7 a.m., the heavier part of the storm will move into the Inland Empire and parts of Orange County.

Around 3 p.m. Saturday, the system starts to break up because the cold front will have passed and most of the rain will have fallen. Between Saturday late afternoon and Sunday morning, there will be scattered showers and pockets of thunderstorms. There will be instability behind the cold front that passes, creating heavy downpours at times, heavy winds, hail and possible tornadic conditions.

Moderate to heavy rain is expected toward the foothills. Snow will hit mountain communities.

By Sunday afternoon, more rain will move into the area and stay steady. The evening could have some breaks in the rain.

By Monday afternoon, there will be some scattered showers.

When will it stop raining in Southern California?

The storm system will move out of the area by Monday night and the region will start drying out by Tuesday.

What will the weather be like in Los Angeles and Orange counties?

Los Angeles and Orange counties could see 1 to 3 inches of rain Saturday and a 60% chance of thunderstorms and hail Sunday. Downtown L.A. could get 2 inches of rain from the storm. Highs will be between 57 and 61 degrees while lows will be between 52 and 50. Monday is expected to be partly sunny.

Thunderstorms are possible with the atmospheric river, which could mean localized heavy rain that exceeds the 2 inches of rain expected.

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What will the weather be like in the valleys and Inland Empire?

The valleys and the Inland Empire could see a 30 percent chance of rain Friday night as the storm moves into Southern California. On Saturday, the region could see 2 to 4 inches of rain, and then on Sunday, more rain is expected with hail and thunder. Highs will be between 54 and 59 degrees and lows between 44 and 43 degrees.

On Monday, the valleys and the Inland Empire will be partly sunny.

Tuesday will be partly cloudy in the morning with highs around 67.

Live radar: abc7.la/LiveMEGADOPPLER

What will the weather be like at Southern California beaches?

The beaches could see a 30 percent chance of rain on Friday with the surf at 2 to 7 feet. On Saturday and Sunday, the coast could see 1 to 2 inches of rain.

By Monday, the chance of rain goes to 30 percent, and then Tuesday, the partly cloudy skies are expected with highs around 67.

When will it snow in Southern California mountains?

Rain is possible in the mountains starting Friday night.

On Saturday and Sunday, mountain communities could see 1 to 2 feet of snow above 6,000 feet and 3 to 5 inches of rain.

On Monday, the mountains will have a 40 percent chance of rain.

Then Tuesday, it will be mostly sunny.

What will the weather be like in the desert?

The desert region could start seeing rain Friday night.

On Saturday and Sunday, the region could see up to an inch of rain.

On Monday, the region will see partly cloudy conditions. Then Tuesday will be mostly sunny, with highs in the 70s.

What are the weather concerns with this storm?

The system is bringing two-and-a-half days of rain to the region. Mudslides, debris flows, flooding and flash flooding will be a concern with this system.

A flood watch was issued for the Southern California region from 10 p.m. Friday to 6 p.m. Sunday due to the expected moderate to heavy rain.

A winter storm warning was issued for the mountain communities from 2 a.m. to Sunday 11 p.m.

A high surf advisory is in place for L.A. County beaches, and a wind advisory is in place for other parts of Southern California.

The thunderstorms also have the possibility of producing hail and tornadic spin-ups.

See the latest 7-day forecast for your area here.