Landslides block roads in Los Angeles area as California faces dangerous flood threat during atmospheric river

Landslides, water rescues and flash flooding were all reported throughout the Golden State on Monday. California faces a continued threat of heavy rain on Tuesday, which will only exacerbate flooding concerns for the already-waterlogged state.

 The gloomy stretch of extreme weather in California continues into Tuesday as an ongoing multiday atmospheric river storm slams the Golden State with flooding rain, damaging wind gusts and landslides in the Los Angeles area, leaving millions of people across the region on alert.

Impacts from this latest round of potentially dangerous weather began on Sunday when torrential rain and strong winds lashed communities from Northern California to Southern California, with numerous reports of flooded roads, downed trees and water rescues.

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And, unfortunately, this isn’t a fast-moving storm by any means. This atmospheric river is expected to linger out over the Pacific Ocean and will continue to funnel rounds of precipitation in the form of heavy rain and mountain snow up and down the state through Wednesday.

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Another round of flooding rain soaks California on Tuesday

A three-hour radar loop showing where rain (green) and snow (blue) are ongoing. Flash Flood Warnings are indicated in green, while Flash Flood Emergencies are indicated in pink. Severe Thunderstorm Warnings are indicated in yellow. Tornado Warnings are indicated in red, while Tornado Warnings with a confirmed tornado are indicated in purple.
(FOX Weather)


 

This latest storm got underway as the weekend started to wind down, and the FOX Forecast Center said this atmospheric river will be more impactful than previous ones that have recently affected the state.

As of Tuesday morning, both Northern and Southern California were being soaked by separate areas of heavy rain, while much of Central California was seeing a lull in the steady precipitation.

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This graphic shows flood alerts in effect in California through Wednesday, Feb. 21, 2024.
(FOX Weather)


 

More than 15 million people in the Los Angeles area have been placed in a Level 3 out of 4 risk of flooding on Tuesday by NOAA’s Weather Prediction Center, while an additional 35-plus million across the state are under a Level 2 out of 4 risk.

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This graphic shows the flash flood threat in California through Wednesday, Feb. 21, 2024.
(FOX Weather)


 

According to the National Weather Service, a landslide was reported Monday in the Los Angeles area east of Point Mugu in Ventura County.

Flooding was also been a problem Monday in Santa Barbara, where officials announced the closure of Santa Barbara Airport (SBA) because of flooding on the runway.

"Commercial flights have been canceled, general aviation operations are paused, and the terminal is closed," the airport said on X, formerly Twitter.

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Santa Barbara County Public Works officials said flooding led to multiple road closures on Monday in Montecito and Santa Maria.

This graphic shows the forecast rain totals in California through Wednesday, Feb. 21, 2024.
(FOX Weather)


 

The flood threat on Wednesday will be lower than what is being seen on Tuesday, with communities from Los Angeles to San Diego placed in a Level 1 out of 4 risk of flooding.

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Landslides, flash flooding reported during storm

Impacts from this atmospheric river storm hitting California started being reported on Sunday night as the first effects began.

Flooded roads were reported in the Sacramento and San Jose areas, according to reports from the NWS.

The NWS also reported a landslide in the Larkfield-Wikiup area north of Santa Rosa on Sunday night that blocked Mark West Springs Road.

The strong winds also brought down numerous trees in the Santa Cruz area.

Massive boulders about half the size of cars were reported across Gibraltar Road in the Montecito area, as well as boulders across Ladera Drive in the Summerland area.

On Monday, multiple highways and roads were closed in Los Angeles and Venture Counties due to flooding, requiring drainage repairs, according to Caltrans. 

The Pacific Coast Highway remains closed from Sycamore Canyon Road to Las Posas Road in Ventura County due to erosion on the southbound shoulder.

Trees have been reported across roads in the Woodland Hills area in Southern California.

FOX Weather Correspondent Robert Ray was in Pacifica, California, on Monday and shared video of massive waves that have been crashing onshore.

Winds there have been whipping upwards of 50 mph.

Winds will be whipping in California

This graphic shows potential wind gusts in California at the time indicated in the upper left.
(FOX Weather)


 

Damaging wind gusts are also possible as the atmospheric river storm slams into California early this week.

"(The winds) are going to be pretty gusty and strong," FOX weather Meteorologist Craig Herrera said. "That could bring trees down."

Power outages are also possible due to the possibility that trees could be brought down due to the higher wind gusts.

"Be ready for some of these old trees, old oak trees and eucalyptus trees," Herrera continued. "Those eucalyptus trees don’t have a good root system, so those could come down pretty quickly."

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This graphic shows current wind alerts in California through Tuesday, Feb. 20, 2024.
(FOX Weather)


 

Millions of people in California are now under wind alerts through Tuesday.

A High Wind Warning is in effect for Mendocino, Lake, Humboldt and Trinity counties due to expected sustained winds of 25-35 mph, with some gusts up to 65 mph possible.

Wind Advisories remain in effect for much of Northern and Central California, including Sacramento, San Francisco and Monterey.

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Sierra Nevada to be slammed with snow

This graphic shows forecast snow totals in the Sierra Nevada through Wednesday, Feb. 21, 2024.
(FOX Weather)


 

Snow is expected in the higher elevations of the Sierra Nevada mountain range – and a lot of it.

"I mean, we’re talking about 1 to as much as maybe 3 feet of snow, especially in the higher elevations," FOX Weather Meteorologist Kendall Smith said.

The snow could lead to some treacherous travel at times, and travel itself could be nearly impossible on untreated roads and highways in the area.

The snow totals will increase the higher you go in elevation.

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