Overview

• Widespread rain is forecast to arrive late Monday, peak from about 3 a.m. to 9 p.m. Tuesday, and taper by early Wednesday.
• Expected totals include 0.5–1.5 inches for Los Angeles and most of Ventura (up to 2 inches on south-facing slopes), 1.5–2.5 inches for San Luis Obispo and Santa Barbara, and 2–4 inches in mountains with a chance to exceed 4 inches.
• Updated model guidance highlights faster sub-hourly rainfall rates that raise flash-flood and debris-flow risk in burn scars, and residents are urged to prepare, monitor alerts and clear gutters where safe.
• Gusty winds of roughly 20–40 mph are expected in mountains and foothills with isolated gusts up to 45–50 mph, and a 10–20% chance of thunderstorms could bring locally heavier downpours and small hail.
• California has prepositioned fire and rescue resources in San Bernardino and Imperial counties, while cooler highs in the 60s–70s and uncertain snow near 6,000–7,000 feet are also in the forecast.