A combination of frigid air with a low pressure system over the Gulf are behind the storm, which could bring heavy snow just south of the Interstate 20 corridor across northern Louisiana and into Mississippi and a mix of snow, sleet, and freezing rain near the Interstate 10 corridor from Houston to Mobile, Alabama.

Houston's first freeze of the year may be over, but another one is headed our way next week—and so is the possibility of some snow. "There are no bones about it, next week looks pretty cold," said meteorologist Eric Berger of Space City Weather in Houston.