has part has output glaze ice layer atmospheric storm icestorm An atmospheric storm during which freezing rain falls and accumulates as ice on exposed surfaces. glaze event silver thaw The U.S. National Weather Service defines an ice storm as a storm which results in the accumulation of at least 0.25-inch (6.4 mm) of ice on exposed surfaces. Icestorms are associated with multiple hazards. Significant accumulations of ice pull down trees and utility lines resulting in loss of power and communication. These accumulations of ice make walking and driving extremely dangerous. Significant ice accumulations are usually accumulations of 0.25 inch or 0.60 cm or more. Has synonyms silver storm, glaze storm. glaze storm ice storm silver storm freezing rainfall