"Across a wide swath of the Southland, there's a moderate risk for flash flooding, urban flooding and debris flow, a type of landslide in which rainfall pouring off hillsides can pick up mud and other debris with punishing speed, vaulting muck at speeds of up to 35 mph into homes and sweeping away parked cars. There's a small chance of particularly severe weather, including locally damaging winds and even a tornado."
""We're looking for a long duration of widespread rain, something on the order of 12 to 24 hours of really nonstop rain for much of Santa Barbara, Ventura and L.A. counties," said Ryan Kittell, a meteorologist in the National Weather Service's Oxnard office. The agency's Weather Prediction Center says large swaths of Southern California have a "moderate flash flood" risk on Saturday, defined as at least a 40% chance of intense rainfall that could lead to flash flooding."
An atmospheric river storm will peak Saturday, bringing prolonged heavy rain and increased potential for flooding and damaging landslides, especially near recently burned areas. Large parts of the region face moderate risk for flash flooding, urban flooding and debris flows capable of hurling mud and debris at high speeds. A small chance exists for locally damaging winds and a tornado. Flood watches cover about 20 million people with start times early Saturday and expected to end by 10 p.m. Officials warn against nonessential travel and advise never driving through flooded roadways. Significant rainfall could produce one-fifth of Los Angeles' annual average by weekend's end.
Read at Los Angeles Times
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