Facing frigid wind chill values of 12 to 20 degrees across the region, Houston and much of Southeast Texas are under a cold weather advisory until 6 p.m. Tuesday, the National Weather Service said. Given that the coldest temperatures of this Texas freeze are expected before dawn on Wednesday,

Mostly clear and very cold with a hard freeze likely and temperatures dipping to the upper teens to low 20s. Many roads, especially bridges and overpasses, will be iced over, so avoid travel if possible.

A winter storm that is expected to begin in Texas next week could end up bringing snow and ice to parts of Florida, but the forecast is far from a lock.

The first ever blizzard warning has been issued for parts of the Texas and Louisiana coast as a historic snowstorm hits the South.