Wet, snow-covered California looks set for another month of wet weather, but uncertainty remains whether late-winter precipitation will pick up over the weekend or fade as warm rain arrives.

What Time Is The Rain Supposed To Start Tonight

Last week, a cold storm turned parts of the state white, felled trees, knocked out power, caused flooding and left some residents trapped in heavy snow.

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Now, with forecasts calling for more rain and snow in March — including the possibility of another stormy river system — California is bracing for severe weather.

“If the rains are heavy and a warm system and a lot of tropical moisture, all the snow melts and falls on the mountains,” said David Sweet, a meteorologist with the National Weather Service in Oxnard.

California’s deadly storm season continued Friday as the first of two tropical storms made landfall in the state, prompting evacuation orders.

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Overall, California’s snowpack provides about one-third of the state’s water supply and has long relied on meltwater that melts slowly during the hot, dry summer months. Flooding from warm rain, melting snow too quickly to fill rivers, causing flooding.

“We’ve got to keep that in the back of our minds and think, ‘Boy, I hope that doesn’t happen,'” Sweet said.

The National Oceanic and Atmospheric Administration’s outlook shows a higher chance of rain across California through March.

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Forecasters say it’s too early to tell exactly how the rest of winter will play out, but the latest 30-day outlook from the National Oceanic and Atmospheric Administration’s Climate Prediction Center, released Tuesday, shows California could see some rain. to the month of March and the cold is stronger. That’s good for a big state snowbank.

“We’re confident that the next two weeks are likely to be rainy and that the rainy weather will continue through the end of the month,” said Jon Gottschalck, chief of the weather service’s forecasting branch. By email.

The western United States is expected to be “under the control of low pressure aloft” in the coming days, Gottschalck said, which could bring more cold temperatures and light snowfall to California. That means “a lot of rain, at least over the next week, will increase the snowpack.”

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Daniel Swain, a climate scientist at UCLA, said about 20% of forecast models now show a very strong and warm storm in California by mid-March. In early January, a series of nine tornadoes hit California, damaging dams and killing nearly two dozen people.

If such an event were to occur after heavy snowfall, “flooding would be very scary,” Swain said on Twitter. But he said it was “predictable at this early stage” because the odds of a warm storm are about 1 in 5.

The winter storm dumped piles of freezing rain and snow on parts of California. More than 50 inches of fresh powder reached the southern peaks, with 93 inches at Mountain High Ski Area in Wrightwood, according to the National Weather Service. Daily rainfall records were set at Los Angeles International Airport and Burbank in downtown Los Angeles and other parts of the region.

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If these conditions continue, the season has a chance to be one of California’s snowiest, Swain said.

Across the state, snowpack remains healthy — 186% of the time for Sunday, according to state data. In the southern Sierra it is 224% of normal. Rivers are healthier and Lake Shasta has nearly doubled in size from two months ago.

Snowy conditions are still in the forecast for the Sierra, including “a very cold pattern with several feet of snow this week,” said Wendell Hohmann, a meteorologist with the National Weather Service in Reno.

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“The atmospheric flow signals are very distant, so the prediction is low, so we don’t have a lot of confidence in it,” Hohmann said, “but the door is somewhat open to keep looking at it.” time, watch it grow.”

In addition to flooding, warm snow can be a challenge for water supplies. Earlier-than-usual snow, especially in the Sierra, will make it difficult for state water managers to plan ahead, have negative impacts on hydropower and ecology, experts say.

The weather service’s Sweet said he is focusing on short-term forecasts, but is still looking at long-term patterns that are “starting to indicate” the potential for such a system.

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The forecast for more rain this winter has exceeded expectations in California as it stands. In October, seasonal observations indicated a drier than normal period due to a rare third La Niña. The fact that it stopped being wet speaks to the challenges of long-term forecasting, Sweet said.

“We still don’t have a focus or a way to look at a long-term forecast with certainty,” he said.

The Lake Arrowhead area has received 5 feet of snow over the past five days, stranding residents, tourists and students. More snow is on the way.

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Improvements in snow conditions and reservoir levels allowed state water managers to increase allocations to the State Water Program by 35%. In December, they said they could only give 5% to 29 agencies that together serve 27 million Californians.

Now. The Drought Monitor also moved almost all of California out of the two worst categories – extremely dry and extremely dry – this year for the first time since 2020.

As of this week, about 33% of the state is in severe drought, the third-worst category, according to the Drought Monitor. About 52% of the state is classified as mild drought and 15% as “no drought”.

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One small county—Del Norte, in the northern part of the state—beat the drought.

Hayley Smith has the latest news in California, focusing on wildfires, drought and climate change. A native of Miami, he earned a master’s degree in journalism from USC. It is part of Southern California Public Radio, a member-supported public media network. For the latest national news from NPR and our live radio station, visit /radio

Traffic flows through a flooded road after a severe storm in Los Angeles on February 2, 2019.

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Los Angeles roads are winding when it rains. So congested roads lead to more accidents, right?

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It is bad. Researchers from USC’s Crosstown Data Journalism Program analyzed traffic and weather data and discovered some unusual patterns.

They divided the LA area into 236 separate grids spanning 16 square miles and tracked traffic and weather crashes for every hour of the day from 2016 to 2018.

During dry days, they found that accidents increased during rush hour when there were more shooters.

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But on rainy days, the researchers found that most accidents happen in the middle of the day – with very few vehicles.

“Anything you can do at high speed in the wet increases the risk [of an accident],” said Gabriel Kahn, one of the researchers on the project.

He explained that drivers drive too fast on the open road in the rain – and don’t brake too soon.

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Crosstown graph shows more accidents when it rains than when it’s dry (Crosstown)

California Highway Patrol spokesman Juan Galvan said on a typical day, during rush hour, his office might receive 30 to 40 calls — but when it rains, that number rises to 150.

It’s all about speed, he said. “Sometimes 40mph is a safe speed – but people are driving 50, 60 and they think they’re still under the speed limit.”

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Crosstown data researcher Mingxuan Yue said it’s difficult to compare traffic to the weather in LA County because the area’s weather can change quickly. He said that simply counting rainy and sunny days in a year is not useful.

“Rain falls at any time of the day and disappears – or happens

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