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.

The ingredients needed to create blockbuster Northeast winter storms historically align this month, all that’s needed is a storm to take the right track.

Ice storms are sweeping across the United States, bringing hazardous road conditions, power outages and potentially severe disruptions. As freezing rain accumulates on trees, power lines and roads, experts warn residents to take precautions before,