The storm left trees and roads in several mid-Atlantic states coated in ice before warmer temperatures moved in.

Residents and storm spotters in portions of Indiana, southern Michigan, Ohio and Pennsylvania reported the unusual mix of freezing rain accompanied by flashes of lightning in the unstable air.

Storms spawned at least one 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.