Blizzard is among phenomenons that produce violent weather. Towards the end of autumn and of winter, when dry and cold arctic air masses cross Great Lakes severe snowstorms, particularly feared arrive in Canada, northern United States and often reach the Gulf Coast of Mexico. These winters go with snow and strong winds may exceed 90 miles per hour (145 km/h) and temperatures can drop to -22°F to -58°F (-30°C to -50°C) and prolonged, which piled snow against all obstacles into enormous snowdrifts, all this for a minimum of at least 6 hours !!!
These very strong winds laden with snow greatly reduces visibility. The wind chill is important and the temperature dropped to or below -31°F (-35°C),so exposure to these conditions quickly cause frostbite on unprotected parts of the body and can be fatal. In less than 24 hours it can to dumped could dump as much as 25 cm of snow and he temperature can drop more than -30°F (-35°C). 01/23/1916 in Browning (Montana) the level of mercury in the thermometer fell 100°F (56°C) from 44°F (7°C) to -56°F (-49°C) in 24 hours, extremely rare occurrence ! Among the large cities that suffer blizzards, Montreal is that which bears the most.
In Russia, the blizzard is called "Purga". In Arctic and Antarctic the blizzard can be a violent wind of 186 mph (300 km/h) that raises layers of snow already formed.
In April 1967 in southern Alberta he fell 175 meters of snow, which is a record for the month of April.
of 1999 in Chicago USA (first photo) with
55 cm (22 pouce)
blizzard slammed into New York with winds
The 01/26/1967 a blizzard of
a 10-days of snowfall in Chicago.