(CNN) As Americans celebrate Easter and Passover this weekend, many will have to contend with snow, hail and tornadoes.

A large storm system will bring severe weather to much of the Southeast on Saturday and Sunday.

"This is a classic springtime set-up," said CNN meteorologist Brandon Miller. "Where a strong storm system is forming along the boundary between the last gasp of winter pushing down from Canada meeting warmer a more humid air from the Gulf of Mexico.

"Ultimately, the cold will win out," he said, "bringing temperatures 20-30 degrees below normal for much of the central US by the start of the workweek, but not before sparking off what could be dozens of damaging tornadoes and strong thunderstorms."

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