Residents of southern California lived with cooler but dry conditions on Monday, but the forecasters warned that a solid storm system was heading for the region which could trigger flood and debris flows, especially in recent burns areas.
The rainy conditions should start on Wednesday, and the National Weather Service has already published a surveillance of the flash floods which will be in effect from Thursday afternoon to late Thursday evening for most of the Los Angeles region.
Forecastists said excessive precipitation could cause sudden floods and debris flows in recent scars, including Eaton and Palisades fires.
“This storm will most likely be the largest precipitation producer to date this season for most of the Southwest California,” said National Weather Service.
The clouds should cover most of the region from Wednesday, with as many half a pumps of rain possible. But the weight of the storm will arrive on Thursday, with widespread rains likely to have an impact on the area for about 36 hours.
“The most dangerous part of the storm will occur with the cold front that will sweep the County of San Luis Obispo on Thursday afternoon,” according to the NWS. “He will move into the county of Santa Barbara on Thursday evening, then the counties of Ventura / Los Angeles after midnight. It will be the disturbing part of the storm, because the precipitation rates almost 1 inch per hour will be possible just ahead and with the front. People in or near recent burns areas will have to be hyper vigilant of weather conditions during this period. There is also a 10% stormy chances with the front which will be able to produce dangerous rain rates above 1 inch per hour as well as winds and / or water kits. »»
Friday, the rain will turn into showers, decreasing this afternoon.
The forecasters said that the storm could drop from 1.5 to 3 inches over a large part of the region, with 3 to 6 inches in the foothills and the coastal mountains.
Snow levels will be around 5,000 feet on Wednesday, amounting to 7,000 feet on Thursday, then falling at around 5,000 feet. Higher altitudes could see “several feet” of snow.
High temperatures will be in the 1950s every day of the storm, which is around 5 to 10 degrees below normal, according to the NWS.

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