What causes ice storms?
Freezing occurs when air warmer than the freezing mark above the ground moves over subfreezing air near the ground. When snow aloft falls through the warmer layer it melts into rain. Then, as the rain droplets fall into the shallow layer of subfreezing air, the droplets freeze upon contact
What happens during ice storms?
The December 2008 Northeastern United States ice storm was a damaging ice storm that took out power for millions of people in those regions. Damage was primarily a result of fallen trees and fallen utility wires and poles, which were coated in a heavy layer of ice. The storm raised heavy controversy over the slow return of power, as at the storm's peak as many as 1.7 million customers were without power. Days after the storm more than 800,000 customers were still without power. Almost a week after the storm still more than 100,000 customers were without power.