by: chabrail Jones, Sophie Ilunga. blizzard. Definition of a blizzard. A blizzard is a severe snowstorm characterized by strong sustained winds of at least 56 km/h (35 mph) and lasting for a prolonged period of time — typically three hours or more.
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-the national weather service defines blizzards as;
-large amount of falling snow.
-large amount of blowing snow.
-the wind speed at least 35 mph.
-the visibilities of less than ¼ mile for an extended period of time( 3 hours or more).
-when these conditions are expected the national weather center issues a “blizzard warning” usually.