L.A. area faces more rain, snow, potential flooding with new atmospheric river
Back-to-back storms poised to soak Southern California
KTLA
by: Marc Sternfield
Posted: Mar 10, 2025 / 03:00 PM PDT
Updated: Mar 10, 2025 / 10:30 PM PDT
Southern California is about to get drenched by two storm systems this week.
The first system, arriving overnight Monday into Tuesday morning, is expected to bring less than half an inch of rain to most areas of metro Los Angeles.
“I expect we’ll see showers continuing into the afternoon and then tapering off in the evening,” said KTLA weather anchor Kacey Montoya. “Then we get a nice break until Wednesday.”
The second and more powerful storm arrives Wednesday afternoon, with the heaviest rain expected after midnight. Thunderstorms are also possible.
“It’s going to be very heavy rain for several hours overnight into early Thursday morning,” Montoya said.
Rain totals of 1 to 2 inches are likely in coastal areas and valleys. The National Weather Service office in Los Angeles has issued a flood watch that takes effect Wednesday at 10 p.m. and continues until 6 p.m. on Thursday.
“Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations,” the warning states. “Debris flows are possible near recent burn scars. Areas of flooding are possible in the mountains below the snow level.”
Snow levels are forecast to drop to 3,000 feet.
Montoya says areas above 5,000 feet could see several inches of snow, and mountains above 6,000 feet will get buried by 1 to 2 feet. “That’s good news for the ski resorts,” she said.
KTLA’s Carlos Saucedo spoke with NWS meteorologist Rose Schoenfeld on Monday evening, who said the Eaton and Palisades burn scars have some of the most sensitive thresholds of rainfall rates to cause impacts.
“Hazardous debris flows are possible near burn scars, additionally if a thunderstorm were to set up we could see lightning, small hail, gusty winds and mountain snow,” said Schoenfeld.
The skies finally clear on Friday ahead of another potential storm system in the extended forecast.
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Mudslides possible as big storm is projected to bring heavy rainfall
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Topline:
Precipitation forecast: Expect 1 to 2 inches in coastal and valley areas, and 2 to 4 inches in the foothills and mountains. Above 6,000 feet, 1 to 2 feet of snow could fall, while up to a foot could fall as low as 4,000 feet, potentially affecting the Grapevine.
Potential hazards: The National Weather Service has yet to issue flash flood warnings, though that could change the closer we get to the storm. Be on the lookout for evacuation notices in recently burned areas, particularly as the storm peaks.
More rain ahead: While this round of precipitation should wrap up by Friday, another storm may arrive early next week.
LAist is part of Southern California Public Radio, a member-supported public media network.
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