The National Weather Service issued a flash flood warning for the Airport Fire burn scar area and parts of Orange County that will be in effect until 7:30 a.m. Thursday.

The storm is expected to dump 1 to 2 inches of rain along the coast and up to 4 inches in the valleys at rates that could cause problems. Some roads will be closed starting Wednesday.

The strongest wave of a powerful winter storm reached Southern California overnight, bringing flash flood warnings, dropping snow levels and a possible tornado. The heaviest rain was dumped during the early morning hours with rates near 1 inch per hour at times prompting officials to issue a flash flood warning for the Airport Fire burn