Stormy Weather

Blizzards and Avalanches

What is a blizzard?

According to the U.S. National Weather Service, a winter storm is considered a blizzard when wind speeds reach 35 miles (56 kilometers) per hour and there is poor visibility of less than one-quarter of a mile (400 meters). Snow does not need to be falling at the time, but blowing and drifting should occur with drifts exceeding 10 inches (25 centimeters) deep.


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