A Winter Storm Warning is in effect over North Texas from 6 p.m. Sunday through 6 p.m. Monday CST as a storm front bears down on the South. A National Weather Service advisory issued at 10:51 a.m. CST has predicted up to two inches of sleet accumulation for the area. A wintery mix of freezing rain will also produce light accumulation.

“Roads, bridges and overpasses in the warning area will be very hazardous and possibly impassible,” warns the weather service. “Do not travel unless it is an emergency.”

Two rounds of precipitation will fall in the affected area over a 24-hour period. A cold rain began on Sunday morning with temperatures in the low- to mid-40s, but as the precipitation petered out in the late afternoon, the temperature plunged drastically to below freezing. In the early hours of Monday morning, the second wave of the storm will move in, in a wave of thunderstorms bearing sleet – or thundersleet, as it is called. Temperatures are expected to remain in the 20s throughout Monday.

Pockets of thundersleet will hit some areas very heavily while missing others. Experts worry that heavy bursts of sleet will result in rapid deterioration of road conditions. Snowfall is expected north of Dallas-Fort Worth early Monday morning, but will quickly turn to sleet by the afternoon.

“This is not going to be a debilitating storm system; this is not going to be that cobblestone ice situation that we experienced last season, or anything like the Super Bowl storm several years ago,” said local meteorologist Ashton Altieri. “But it is going to be enough to probably cause some serious disruptions on the roadways, and I would not be surprised if at least some schools cancel classes for Monday; probably some businesses as well.”