Storms spawned at least one brief tornado, sent creeks over their banks and caused flash flooding Thursday in portions of West Virginia and Kentucky, while a wintry mix coated trees and roads in ice and even dropped “thunder ice” in several states.

Sign up for the Morning Brief email newsletter to get weekday updates from The Weather Channel and our meteorologists.A​ winter storm covered cities in ice and snow, shut down schools, snarled air travel and made for a dicey commute along major metropolitan corridors from the Midwest into the Northeast Thursday.