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
Several Fires Break Out in SoCal Amid Santa Ana Wind Event

Several Fires Break Out in SoCal Amid Santa Ana Wind Event

Santa Ana winds helped several fires grow qui

18 Oct 2026 10:25 AM
Frost & Freeze Alerts Issued Behind Strong Cold Front

Frost & Freeze Alerts Issued Behind Strong Cold Front

After record heat impacted much of the Centra

18 Oct 2026 10:20 AM
Tropics: Champi Bears Down on Guam, Pacific Staying Active

Tropics: Champi Bears Down on Guam, Pacific Staying Active

Isaias ended the late-season streak of no hur

18 Oct 2026 10:15 AM
Pattern Change for the West Next Week

Pattern Change for the West Next Week

The fire situation in California is slowly im

18 Oct 2026 10:05 AM
Severe Risk Diminishing Saturday Morning for the Northeast

Severe Risk Diminishing Saturday Morning for the Northeast

Severe Storm PotentialSevere risk is decreasi

16 Oct 2026 10:20 AM
Flooding & Severe Storms Persist in the Southern Plains

Flooding & Severe Storms Persist in the Southern Plains

Extreme rainfall has been hitting areas of Te

16 Oct 2026 2:00 AM
Cooler Air & Lingering Snow for The Rockies

Cooler Air & Lingering Snow for The Rockies

A digging trough is bringing cooler temperatu

15 Oct 2026 10:00 AM