Flash Flood and Debris Flow Risk for Southern California Wednesday

news image
Top Stories
4 Dec 2019 7:01 AM
https://www.youtube.com/watch?v=wVqfm7klJdE&feature=youtu.be     An atmospheric river of Pacific moisture will be streaming over the Southwest Wednesday.  This particular set-up will lead to heavy rain and mountain snow for California. Southern California could see the heaviest rain from this event and that means a risk of flash flooding.  Burn scarred areas from the wildfires this year will be included with that heavy rain risk and that means we could see some debris flows and mudslides.

Flood Alerts

Flood alerts are in place today from Santa Barbara to San Diego as conditions will continue to be dangerous through the afternoon.  If you are located in any of these areas, you will want to make sure you have a way to get to higher grounds.

Forecast

The heaviest rain for the Pacific Coast will be for the morning hours. By the early afternoon the heaviest rain will be farther inland, but the risk for flooding will last well into the afternoon.

Rainfall Through Early Wednesday

Rainfall Potential

A solid 1-3 inches of rainfall will be possible across Southern California, but away from the coast some areas could see over 4 inches of rainfall.  This amount of rain will could lead to flooded roads and travel delays. Keep checking with WeatherNation for the latest heavy rain updates.  
All Weather News
More
Chances of Development Increasing in the Gulf

Chances of Development Increasing in the Gulf

Tropical Storm Dolly formed in the Atlantic o

30 Aug 2026 7:50 PM
Next System Lining Up in the Northeast

Next System Lining Up in the Northeast

Wash. Rinse. Repeat. Each week there's been a

30 Aug 2026 7:50 PM
Days of Severe Weather For The Plains

Days of Severe Weather For The Plains

It has been an active summer for portions of

30 Aug 2026 7:40 PM
Western U.S. Enters a Rainier Pattern

Western U.S. Enters a Rainier Pattern

Ready for some fall-like temperatures? Some r

30 Aug 2026 7:35 PM
El Niño Powers a Party in the Pacific

El Niño Powers a Party in the Pacific

The Pacific hurricane season is showing no si

30 Aug 2026 5:30 PM
El Nino Pushes Sharks into Southern California Beaches

El Nino Pushes Sharks into Southern California Beaches

During El Nino, temperatures across the Easte

30 Aug 2026 10:00 AM
Southwest Heatwave Breaking Down

Southwest Heatwave Breaking Down

High pressure continues to dominate the South

29 Aug 2026 6:35 PM