Residents across parts of the Gulf Coast and South are bracing for a rare winter storm expected to drop heavy snow and create treacherous conditions.

While temperatures will warm up by mid-morning, refreezing remains a concern, particularly north of the Metroplex.

A rare frigid storm charged through Texas and the northern Gulf Coast on Tuesday, blanketing New Orleans and Houston with snow that closed highways, grounded nearly all flights and canceled school for more than a million students more accustomed to hurricane dismissals than snow days.