This isn't an ordinary heat wave. Many locations could set new all-time March, even April, record highs from the West Coast into the Plains. And this will have one other impact that could linger into summer.

Two EF1 tornadoes ripped through Columbia and Bonnertown, Tennessee, and just as people were wrapping their minds around the damage, they got snow! See the weather whiplash delivered by the severe weather outbreak.

Decades before radar and tornado warnings, this is still widely considered the nation's single worst tornado event.

The digging out is always the toughest part. Blizzard conditions drove snow into huge piles in Marquette, Michigan. The area received more than 3 feet of snow over Sunday and Monday as Winter Storm Iona blasted through.