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A month’s worth of rain could hit the Los Angeles area over 2 days, AccuWeather forecasts

January 17, 2019 Visit California No Comments Email Email

Following one round of rain and mountain snow on into Tuesday, an even larger storm system will further raise the risk of flooding, mudslides and avalanches from Wednesday into Thursday.

Los Angeles received over an inch of rain from Monday’s storm, and San Diego picked up nearly 0.50 of an inch of rain.

The Los Angeles basin could receive 2-4 inches of rain beginning Wednesday night and lasting into Thursday night, AccuWeather meteorologists are forecasting, bringing the potential total up to 5 inches. The average rainfall for that area in January is 3.12 inches.

Areas north of Los Angeles could get 4 to 8 inches of rain, while less populated areas around Paradise – so hard hit by the wildfires – could receive more than 8 inches of rain.

With several inches of additional rainfall expected and many more feet of snow on tap across the Sierra Nevada Wednesday afternoon through Thursday, the threat of flooding, mudslides and avalanches will continue to ramp up through the end of the week.

“Burn-scar areas will be most susceptible to devastating debris flows, and residents living in these areas should heed all evacuation orders by officials. Flooding and mudslides may not be limited to these communities,” AccuWeather Senior Meteorologist Kristina Pydynowski said.

Excessive rainfall is predicted over western foothills of the Sierra Nevada and the northern Coast ranges, as well as the south- and southwest-facing slopes of the mountains surrounding Los Angeles and Santa Barbara.

In areas hit by the heaviest downpours, there can be an AccuWeather Local StormMax™ of 15 inches.

“San Diego will likely receive between 1 and 3 inches of rain by week’s end,” said AccuWeather Meteorologist Brian Thompson. “The city averages 1.98 inches for the entire month of January.”

The storm may also generate a couple of waterspouts and brief tornadoes.

“In the mountains, there can be at least a couple yards of snow in the high country of the central and southern Sierra through Thursday night, counting what already fell this weekend and on Monday,” said AccuWeather Senior Meteorologist Alex Sosnowski.

As much as 3 or 4 feet of additional snow will bury Interstate-80’s Donner Summit through Thursday night, making chains and traction devices necessary for those without four-wheel drive. Motorists should be prepared for potential restrictions and closures.

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