Overview

• Lightning and brief downpours hit Southern California overnight as tropical moisture from former Tropical Storm Mario pushes north, with more storms possible today.
• Flood watches are posted through late Thursday night for Los Angeles, Ventura, Riverside and San Bernardino counties, with a separate watch for San Diego deserts and mountains.
• Coachella Valley and the Central Coast are under the threat of localized heavy rain with sharp rainfall gradients, and recent burn scars such as the Palisades and Eaton areas face higher debris‑flow risk.
• The Storm Prediction Center earlier noted isolated severe potential from southeastern Colorado into southwestern Kansas, while Colorado storms are diminishing this morning with cooler highs.
• Across the Midwest and Plains, including Iowa and the Omaha area, scattered storms could produce pockets of 1–2 inches of rain along with isolated hail and gusty winds through Friday.