Overview
- Rain totals are forecast at 1 to 2 inches for coastal and valley areas of Los Angeles, Ventura and Santa Barbara counties, with 2 to 4 inches on south- and southwest-facing mountain slopes including the San Gabriels.
- The heaviest precipitation is expected Thursday afternoon and evening with about six to eight hours of rain, brief rates up to three-quarters of an inch per hour and a low chance of 1 inch per hour, raising the prospect of roadway flooding and a likely flood watch for vulnerable areas.
- Recent burn scars face an elevated risk of debris flows and mudflows, and residents are urged to monitor National Weather Service alerts for potential warnings.
- Gusty winds could peak near 50 mph on the Grapevine and in the Antelope Valley, with lower but notable gusts across the L.A. Basin, creating difficult travel and localized hazards.
- Snow levels should start near 9,000 feet and drop to around 6,000 feet late Thursday into Friday, temperatures will cool into the 60s before warming into the low 70s over the weekend, and a Santa Ana pattern early next week remains uncertain.