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The storm system is expected to bring heavy rain and mountain snow to Southern California until late Wednesday night.
According to the National Weather Service, thunderstorms and gusts of winds and gusts of winds are at a higher risk of flooding on the threat of roads and mud and debris flows.
“The main event is tonight and there’s a powerful, fast-moving cold front crossing the area from northwest to southeast,” the NWS said. “This storm is very wallop packed despite its short period.”
The total rainfall is expected to peak between 1-2 inches in the Los Angeles County Coastal and Valley areas, with up to 4 inches possible in mountain and hill areas.
Flood monitoring will be issued across Southland, leaving neighborhoods at high risk of landslides and debris flow under evacuation warnings and orders until 6pm on Thursday, March 13th.
Significant storms are expected to peak frequently early Thursday mornings until late Wednesday night, bringing sophisticated road conditions and snowfall to higher elevations. (KTLA) Significant storms are expected to peak frequently early Thursday mornings until late Wednesday night, bringing sophisticated road conditions and snowfall to higher elevations. (KTLA) Significant storms are expected to peak frequently early Thursday mornings until late Wednesday night, bringing sophisticated road conditions and snowfall to higher elevations. (KTLA) (National Weather Service) The major storms are expected to peak frequently early Thursday mornings until late Wednesday night, bringing refined road conditions and snowfall to higher elevations. (KTLA) Significant storms are expected to peak frequently early Thursday mornings until late Wednesday night, bringing sophisticated road conditions and snowfall to higher elevations. (KTLA)
“We have a lot of cold air, which creates all the instability and threats of a thunderstorm,” said KTLA meteorologist Bella Zimenez. “Whenever we talk about a rainfall rate of at least 0.5 inches per hour, we see the threat of flooding. When this particular front comes in, we’re not only 0.5 inches of rain per hour, but 3/4 inches of rain per hour.
Snowfall is expected at winds of 45-65 mph at elevations above 3,000 feet. The winter storm warning will be icy as effective at 6pm on Saturday, March 15th, with icy, dangerous road conditions likely affecting drivers traveling on five highways near Grapevine, 14 highways from Acton to Palmdale, and Highway 33 north of Ojai.
Drivers are advised to be extremely careful as high winds and potential for heavy snow can lead to reduced visibility.
“I urge all Angelenos to listen to all weather warnings, especially as heavy rain approaches,” said La Mayor Karen Bass. “This storm could affect areas throughout the city, not just burned areas.”
Residents are advised to avoid travel during the storm if possible. If travel is required, drivers should be aware of fallen trees, power lines and flooded roads. We recommend packing an emergency kit in your car.
“That flood clock not only contains mountains and hills and burning wounds, but is actually widely used, and is subject to flood threats everywhere in the five counties,” Zimenez explained.
Anyone who sees a blocked or flooded road can request service via 311 via MyLA311. Call 311.
“Thursday will be a mixed bag of weather with showers and thunderstorms, torrential rains and low elevation periods, but there will also be sunny breaks,” the NWS said. “A light shower is expected on Friday and will be dry and warm over the weekend.”
Another weak storm is expected between Friday and Saturday, with a higher chance of light rainfall, but the skies should be clear by Sunday, weather officials said.
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