Atmospheric River Unleashes Major Flood Threat Across Southern California

Southern California Braces for Intense Atmospheric River

Southern California is currently under severe weather alerts as an 'epic atmospheric river' storm makes landfall, threatening widespread flooding, mudslides, and debris flows across the region. The National Weather Service (NWS) has issued a flood watch for a broad area, effective from 4 a.m. to 10 p.m. on Saturday, November 15, 2025.

The storm's most intense period is expected from late Friday, November 14, into Saturday, November 15, bringing a month's worth of rain in a single day to some areas. Forecasters predict 2 to 5 inches of rain across low-lying areas, with coastal slopes potentially receiving up to 8 inches. Downtown Los Angeles could see nearly 3 inches of rain between Friday morning and Sunday, a total that could mark its wettest November since 1985.

Evacuation Warnings and High-Risk Areas

Authorities have issued evacuation warnings for residents in areas near recent burn scars, which are particularly vulnerable to mud and debris flows. These warnings are in effect through 11 a.m. on Sunday, November 16, and encompass regions affected by the Palisades, Eaton, Kenneth, Sunset, and Hurst fires from January. The NWS has highlighted that rainfall rates could reach up to 1 inch per hour, a pace sufficient to trigger significant runoff and dangerous conditions.

Counties under flood watch or emergency proclamation include:

• Los Angeles County
• Orange County
• Riverside County
• San Bernardino County
• San Diego County
• San Luis Obispo County
• Santa Barbara County
• Ventura County

Officials are urging residents to remain vigilant, prepare emergency 'go-bags,' and strictly adhere to any evacuation orders. The Los Angeles Fire Chief, Jaime Moore, advised residents to 'stay home and get cozy,' suggesting they 'consider changing your weekend plans and stay home, cuddle up, watch a movie.'

Potential Impacts and Outlook

Beyond flooding, the storm carries additional risks, including the possibility of damaging winds and even a brief tornado. The heavy precipitation is expected to taper off by Saturday night and mid-morning Sunday, offering a brief respite. However, forecasters indicate that another storm system could bring additional rainfall to the region as early as Monday, suggesting a prolonged period of unsettled weather.

The NWS has emphasized the importance of monitoring local forecasts and being prepared for rapid changes in conditions, particularly in areas prone to flooding and near fire-damaged hillsides.