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
Farthest Humans Ever from Earth: Artemis II

Farthest Humans Ever from Earth: Artemis II

NEW RECORD - At 1:56 PM ET on Monday, April 6

7 Apr 2026 2:00 AM
Florida: Rain Coming to Drought-Stricken State

Florida: Rain Coming to Drought-Stricken State

A low-pressure system that moved over Texas b

7 Apr 2026 1:45 AM
Windy System Blows in Midweek

Windy System Blows in Midweek

If it's not a foot and a half of snow in the

7 Apr 2026 1:30 AM
West Pattern: Moisture Returns

West Pattern: Moisture Returns

The drought conditions have started to increa

7 Apr 2026 1:15 AM
Severe Threat Looms This Weekend

Severe Threat Looms This Weekend

Here we go again. After what looks like a lar

7 Apr 2026 12:50 AM
Severe Storms Push East Easter Sunday

Severe Storms Push East Easter Sunday

Several rounds of severe storms have tracked

5 Apr 2026 10:55 PM
Cold Front Ends Record Heat

Cold Front Ends Record Heat

Unseasonably warm air is taking over much of

5 Apr 2026 10:20 AM