Blizzards are dangerous winter storms that combine blowing snow and wind, resulting in very low visibility. While heavy snowfalls and severe cold often accompany blizzards, they are not required for a winter storm to be called a blizzard. Sometimes strong winds pick up snow that has already fallen, creating what’s known as a ground blizzard.
Officially, a blizzard is a storm that contains large amounts of snow OR blowing snow, with winds in excess of 35 mph and visibility of less than 1/4 mile for an extended period of time (at least three hours). When these conditions are expected, the National Weather Service will issue a Blizzard Warning.
Read more about Blizzards and other valuable winter weather information at the National Weather Service website.