The first wave of the storm system is already affecting southern parts of the St. Louis region, with snow, sleet, and rain falling overnight, while the more substantial storm is expected to impact Wednesday into Wednesday evening, bringing significant impacts on travel and daily activities.

A winter storm watch is takes effect at 9 a.m. on Wednesday until 3 a.m. on Thursday. Major travel impacts are expected, including air travel. The worst of this storm is expected to hit in the afternoon and evening.

Oklahoma is in for a wild ride of winter weather over the next 24 hours. A powerful system is moving through the state, bringing a messy mix of precipitation, including freezing rain, sleet, and snow.