It will be a stormy and snowy Super Tuesday for many voters, forecasters said as a large front threatened 22 million Americans with thunderstorms and hail in the South and snow in the Midwest.
The extreme weather system was forecast to move from Arkansas to Ohio pm Tuesday. Thunderstorms with large hail and damaging winds were possible in Arkansas then Tennessee and Kentucky before the threat moved on towards Alabama and Mississippi.
"These storms will be moving quickly and effect most locations for up to 30 minutes so voters will be inconvenienced but if they wait out the storms weather will clear out quickly," NBC News forecaster Bill Karins said.
The cold side of the front was expected to bring snow in Wisconsin and Michigan, while interior New York and northern New England were set for snow Tuesday night through Wednesday morning, Karins added.
In the Chicago area, a Winter Storm Warning was issued by the National Weather Service for Lake, McHenry and Boone counties until 9 a.m. Tuesday, while a Winter Weather Advisory was in effect for Cook, DuPage, Kane and DeKalb counties, according to NBC Chicago.
Winter storm warnings were also in effect across Michigan.
The came as The Weather Channel warned that another front could bring snow and wintry weather to many central and eastern states later this week.