The same system that brought deadly tornadoes and complete devastation to Oklahoma is on the move Thursday.
'DAMAGING' TORNADOES SWEEP THROUGH OKLAHOMA, LEAVING AT LEAST 2 DEAD
Tornadoes in the Plains on Wednesday (Credit: Fox News)
It is crossing over the Mississippi and Tennessee valleys, with the risk of very large hail, damaging winds, tornadoes and flooding rainfall.
The threat of severe storms on Thursday across the Plains to the Great Lakes (Credit: Fox News)
Behind this system, the air is cold enough for upward of a foot of snow from the Great Lakes back through the Rockies.
Snow still forecast through Saturday in the northern U.S. (Credit: Fox News)
Ahead of the storm, temperatures are very warm, which will enhance the threat of strong thunderstorms throughout the day.
April forecast highs and falling temperatures across the U.S. (Credit: Fox News)
Meanwhile, the Northwest and northern California remain unsettled, with more coastal rain and snow in the higher elevations.