Blizzards

Blizzards are severe winter storms that pack a combination of blowing snow and wind resulting in very low visibilities. While heavy snowfalls and severe cold often accompany blizzards, they are not required. Sometimes strong winds pick up snow that has already fallen, creating a blizzard. Officially, the National Weather Service defines a blizzard as large amounts of falling OR blowing snow with winds in excess of 35 mph and visibilities of less than 1/4 of a mile for an extended period of time (greater than 3 hours). When these conditions are expected, the National Weather Service may issue a “Blizzard Warning”. When a less severe, but still dangerous, winter storm is expected a “Winter storm Watch” or “Winter storm Warning” may be issued. A “Winter storm Watch” is issued in advance and means that there is the possibility of a winter storm affecting your area. Keep alert and stay tuned to TV, radio, and other sources of weather information. A “Winter storm Warning” means a winter storm is imminent or already occurring.
What makes blizzards dangerous?
Blizzards can create a variety of dangerous conditions. Traveling by automobile can become difficult or even impossible due to “whiteout” conditions and drifting snow. If you must drive in a blizzard, be prepared! Make sure your automobile is properly equipped and that you have emergency supplies in case you become stranded or lost.

The strong winds and cold temperatures accompanying blizzards can combine to create another danger. The wind chill factor is the amount of cooling one “feels” due to the combination of wind and temperature. For instance, a strong wind combined with a temperature of just below freezing can have the same effect as a still air temperature about 35 degrees colder. A wind chill chart may be used to estimate the wind chill factor.
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