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Flash Flood and Debris Flow Risk for Southern California Wednesday

4 Dec 2019, 7:01 am



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.


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.


About the author
Patrick Crawford has always been a huge weather buff! He grew up in Plano, Texas, and it was there that he experienced what Mother Nature was capable of doing. He would always turn on the television to see what local meteorologists were saying about the weather. That's when he realized he wanted to be a meteorologist. Patrick graduated from Northern Illinois University (’04) with a degree in ... Load MoreMeteorology and a double minor in Mathematics and Geography. Broadcast Meteorology has been great to him and he has been able to work in television markets all across the country. Some of his stops have included New Orleans, Green Bay and even Yuma, Arizona. He is so excited to be part of the WeatherNation team. He has been awarded the prestigious CBM (Certified Broadcast Meteorologist) weather seal from the American Meteorological Society. Feel free to catch up with Patrick Crawford on his Facebook and on Twitter pages.

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