A major storm continued to wallop much of Southern California on Thursday morning, bringing evacuation warnings, fears of mudslides and heavy mountain snow.

Evacuation warnings were in place for several Los Angeles burn scar areas that were ravaged by wildfires two months ago.

The strongest wave of a powerful winter storm reached Southern California overnight, bringing flash flood warnings, dropping snow levels and a possible tornado. “Storms will likely produce

A huge storm system crossing the U.S. threatens to unleash tornadoes Friday in the Mississippi Valley, blizzards in the northern Plains and dry, gusty conditions in Texas and Oklahoma that pose a high risk of wildfires.

Forecasters expect the thunderstorms to swamp the South and move toward the East Coast on Saturday night into Sunday. Although the tornado threat is expected to decrease, the East Coast will likely face hail and potentially damaging wind gusts.