Blizzards need three things to form: temperatures below freezing at ground level and in the air so that the snow can form in the clouds, moisture so that the clouds can form to create the snow, and a mass of warm air rising over a mass of cold air that creates strong winds.
A blizzard is a dangerous, winter weather storm with a combination of blowing snow and winds. This combination will often cause low visibilities. Many people think that to have a blizzard there must be heavy snow fall and cold temperatures, however, this is not the case. According to the National Weather Service, blizzards are snow storms with large amounts of falling or blowing snow and the winds must reach over 35 mph and have a visibility of less than a quarter of a mile for at least 3 hours.
Blizzards are most likely to occur in the northern plains because, the flat terrain allows winds to reach the required speed (35 mph), and the cold temperatures make the snow light and easy to blow around. In the U.S, they can occur in New York, Colorado, Alaska, Iowa, Kansas, Nebraska and many more. They are very common in Europe, but are most common in Russia and surrounding countries. Really however, they can occur wherever snow falls.
Because of the strong winds that Blizzards cause, trees, power lines, and utility poles are often knocked down in thie disaster. Storms along the coast may cause flooding and/or beach erosion. And, in the west, the winds can reach up to 100 mph, damaging the roofs of houses and other structures.
The video above shows the conditions of a blizzard. As you can see, there is very low visibility, and there are very strong winds. The snow is blowing all around, and there are no cars on the roads due to the winds, ice and low visibility. Also, the power lines are vigorously moving back and forth and it is not uncommon for them to fall.
This photo clearly shows how hard it is to see in a blizzard. Each photo was taken from the same space before the blizzard, when the blizzard is starting, and during the blizzard. The fist photo is clear, whereas in the last photo, almost all that is visible is the top of the house.