ABC News(NEW YORK) — A powerful new storm is slamming California later Wednesday with heavy rain and heavy snow in the mountains, creating conditions that could lead to flash floods, before it heads for the Midwest by the end of the week. The heaviest rain in San Francisco and central California is expected Wednesday night, as the Bay Area is experiencing its wettest May since 2015.Some areas in northern California could see 4 inches of rain, with the Bay Area expecting 1 to 2 inches.By Thursday morning, the heaviest rainfall will shift toward Los Angeles and Southern California, where at higher elevations snow is expected.Parts of the Sierra Nevada could see as much as 2 feet of snow.The storm is forecast to move east by Friday. Severe weather is expected in the central U.S., from Minnesota all the way down to Texas. Damaging winds, hail and tornadoes are all possibilities.Copyright © 2019, ABC Radio. All rights reserved.