LOS ANGELES, CA — A Pacific storm is bringing big surf to Southern California Saturday followed by heavy rain, triggering a Flood Watch heading into next week.

The National Weather Service issued a Coastal Flood Advisory and Flood Watch in Los Angeles County Sunday night through Tuesday when another atmospheric river is expected to bring moderate to heavy rainfall to a region still saturated from last week’s record-setting rainfall. Though this storm isn’t expected to be as powerful as the last, it has the potential to trigger more mudslides and flooding.

It’s the first of back-to-back storms moving into Southern California over the next week.

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According to the National Weather Service, much of the Los Angeles region can expect 2-5 inches of rain with as much as 4-8 inches in the mountains and

foothills. “Area creeks and streams are running high and could flood with more heavy rain,” forecasters warned.

Orange County, southwest Riverside County and the Coachella Valley can expect 1.5-2 of rain from the storm,

according to the weather service. The storm is expected to weaken south of Oceanside with San Diego area rainfall totals expected to remain under an inch.

National Weather Service

Heavy snow — between 1 and 3 feet — is expected at higher mountain elevations starting as early as Sunday night, forecasters warned. The heaviest rain and snow are expected on President’s Day.

Even before the storm moves into the region, it’s expected to cause large swells and waves from Los Angeles to San Diego. A High Surf is in effect for all

of Southern California’s coast from 4 p.m. Saturday to 10 p.m. Tuesday. The high surf will peak Sunday and again Tuesday, forecasters warn.

Authorities are warning of dangerous surfing and swimming conditions with large breaking waves of 6 to 8 feet with sets of 10 to 12 feet.

The region is expected to remain mostly dry into Saturday, with the front of the storm system pushing into the area by Saturday night. But the Los Angeles area is only expected to receive at most a tenth-of-an-inch of rain, if any.

Rain is expected to be generally light in the L.A. area Monday morning, but increasing as the day and week wear on. Forecasters said that by Tuesday evening, “heavier showers will be likely, and thunderstorms cannot be ruled out.”

“Any thunderstorm is capable of briefly producing damaging wind gusts and a weak tornado, eve if there is little to no lightning,” according to the NWS. “Rainfall totals during this time will

generally be 0.5 to 1 inch, with up to 2 inches possible across south-facing slopes and especially the eastern San Gabriel Mountains. Rainfall rates will approach up to 1 inch per hour during times of convection and the heaviest showers.”