Spring was expected to move across the central U.S. like a lion Wednesday with more than 18 million people potentially facing severe weather.
Blizzard conditions, high winds, flash flooding, large hail and tornadoes were among the hazards, NBC News meteorologist Bill Karins warned.
The area at greatest risk of tornadoes stretched from northeast Texas into northern Louisiana and western Mississippi, according to Karins. Isolated tornadoes were also possible from Arkansas to Iowa.
Karin said that heavy rain expected over the next two days could see the return of flooding to Louisiana, Alabama and Mississippi.