SUMMARY
- Southern California flood warning issued for burn scar areas in Los Angeles County
- Up to five inches of rain forecast in mountains, increasing debris flow risk
- Los Angeles International Airport imposed a temporary ground stop due to low visibility
LOS ANGELES — A Southern California flood warning prompted evacuation alerts Monday as a powerful winter storm swept across the region, bringing heavy rain, strong winds and mountain snow, according to the National Weather Service.
The storm, the first of three systems expected this week, delivered steady rainfall early Monday, with forecasters predicting one to three inches in coastal and valley communities and two to five inches in higher elevations.
Officials said burn scar zones in the Santa Monica Mountains face heightened flash flood threats.
The Southern California flood warning covers communities near recent wildfire areas, including Pacific Palisades and surrounding foothills, where vegetation loss can accelerate runoff.
David Sweet, meteorologist with the National Weather Service in Oxnard, said intense rainfall over short periods could trigger debris flows.
“Burn scars significantly reduce the soil’s ability to absorb water,” Sweet said. “That increases the flash flooding risk even with moderate rainfall totals.”
Los Angeles County authorities warned residents not to drive through flooded roads. The airport confirmed departures were paused until at least midday because thunderstorms reduced visibility.
The storm also prompted a gale warning offshore. The Los Angeles County Lifeguards reported gusts up to 35 knots, urging mariners to remain in port.
Daniel Swain, climate scientist at the University of California Agriculture and Natural Resources, said warmer atmospheric conditions can intensify rainfall rates. “Extreme precipitation events are becoming more concentrated,” Swain said.
Forecasters expect colder temperatures and additional systems later this week. Authorities said evacuation warnings will remain in place where conditions warrant.
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