(CNN) As voters prepare to head to polling places on Super Tuesday, most of the 14 states holding primary elections are forecast to contend with rain and snow.

The heaviest rain will extend from Dallas to Atlanta. Rain will be more isolated across the Northeast, but for areas of Vermont and Maine, that rain will be mixed with snow at times.

Over 20 million people in Southern states, like Texas, Louisiana, Arkansas, and Mississippi, may experience some strong to severe storms. The primary threats will be damaging winds and hail. If you are in a state with a severe threat, your best bet would be to vote in the morning, when the severe potential is at its lowest for the day.

The other concern for Southeastern states is the threat of flooding. Many states in that region, including Tennessee, Alabama and North Carolina, already have a saturated ground thanks to an abundance of rainfall the first two months of the year.

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