Debris Flow Threat for Southwest California

news image
Top Stories
18 Mar 2018 7:10 PM
All eyes continue to be on a strong storm system that will be making its way into Southwest California Tuesday through Thursday night. An atmospheric river, or an intense plume of moisture out over the Pacific Ocean, will supply the approaching system with enough water to likely produce some of the highest rainfall totals so far this season for this area. https://twitter.com/twitter/statuses/975545834807808000 The heaviest of the rain is expected to fall between late Tuesday night and early Thursday We could see peak rainfall rates between 0.50-0.75" per hour, which could lead to an increased threat of flash flooding/debris flows in the Thomas, Whittier, Creek, and La Tuna burn scar areas. https://www.facebook.com/WeatherNation/videos/10156232567654874/ Pre-Evacuation advisories are already in effect for some cities in and near these burn scar locations. https://twitter.com/countyofsb/status/975177158653022208 Storm totals are forecast to be between 1-4" for the coasts and valleys and up to 6" possible in the foothills and mountains. In addition to a concern for the recent burn areas, other impacts include widespread flooding across the entire region and rockslides in/near canyons. Check in with your local emergency managers for the latest evacuation notices prior to this storm. For WeatherNation, I'm Meteorologist Meredith Garofalo
All Weather News
More
Repeated Rain Raises the Flood Threat Down South

Repeated Rain Raises the Flood Threat Down South

A slow-moving frontal boundary that brought n

22 May 2026 2:25 AM
Severe Storms Stick Around Thursday

Severe Storms Stick Around Thursday

We've had quite the active stretch to start t

22 May 2026 2:15 AM
CALIFORNIA: Wildfires Prompt Evacuations

CALIFORNIA: Wildfires Prompt Evacuations

SIMI VALLEY, CA - On Monday, May 18th in Vent

22 May 2026 2:00 AM
NOAA Predicts Below Normal 2026 Hurricane Season

NOAA Predicts Below Normal 2026 Hurricane Season

NOAA has released their predictions for the 2

22 May 2026 2:00 AM
NOAA Releases Summer Outlook, Above Average Temperatures Expected

NOAA Releases Summer Outlook, Above Average Temperatures Expected

The National Oceanic and Atmospheric Administ

22 May 2026 1:05 AM
Rockies Brace for Snow, Severe Storms as Cold Front Moves In

Rockies Brace for Snow, Severe Storms as Cold Front Moves In

ROCKIES - Through the rest of the week, an up

21 May 2026 5:30 PM
One More Day of Blistering Temperatures

One More Day of Blistering Temperatures

A big warmup is taking hold across the easter

20 May 2026 4:10 PM