People in Texas and much of the U.S. South are facing record snowfalls and icy conditions, with both New Orleans and Houston covered in snow. The big picture: This once-in-a-generation event for millions across the Gulf Coast has closed schools,

Precip may start as rain, but as temps fall to the freezing mark after sunset Monday, a transition to freezing rain and sleet is expected.

This upcoming system is expected to usher in even colder conditions, with some areas bracing for single-digit lows and temperatures in the low teens — marking the coldest weather of the winter so far.