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
Isaias Makes Landfall as A Category 2, Impacts Spreading North

Isaias Makes Landfall as A Category 2, Impacts Spreading North

Hurricane Isaias made landfall near Destin, F

12 Oct 2026 1:30 AM
Rachel Spreading Moisture into the Southwest

Rachel Spreading Moisture into the Southwest

Rachel came ashore in far northwestern Mexico

12 Oct 2026 1:30 AM
Hot Weather Baking the Heartland This Week

Hot Weather Baking the Heartland This Week

More records were broken across the central p

12 Oct 2026 1:30 AM
Digging Trough Brings Wind and Snow to the Northern Rockies This Weekend

Digging Trough Brings Wind and Snow to the Northern Rockies This Weekend

A strong upper-level trough digging south fro

12 Oct 2026 1:25 AM
Tropics: Another Blob in the Atlantic, Pacific Stays Hyperactive

Tropics: Another Blob in the Atlantic, Pacific Stays Hyperactive

Isaias ended the late-season streak of no hur

12 Oct 2026 12:45 AM
Flooding, Tornadoes Target Central Florida Thursday

Flooding, Tornadoes Target Central Florida Thursday

Deep tropical moisture streaming north from t

8 Oct 2026 1:00 PM
Fall Chill Grips the East While Record Heat Bakes the West

Fall Chill Grips the East While Record Heat Bakes the West

A major temperature divide is unfolding acros

7 Oct 2026 10:00 AM