What are Blizzards?
Blizzards are very dangerous weathering events characterized mainly by heavy snowfall, high winds, low temperatures and almost zero visibility. If category 1 hurricane suddenly appeared above the Midwest United States in January, the results would be very similar to a blizzard. Some blizzards are so serious and so unforgettable that they will become part of the weather history. For example, a particularly devastating blizzard, which was formed above the area of the Great Lakes in 1978, is still called "Great Varice of 1978." Similar blizzards in 1977 and 1993 are also considered the "storm of the century". One such criterion is wind speed. Permanent wind speeds in the right Christmas exceed 35 mph (approximately 53 km / h). This is the equivalent of the tropical depřimuission or the minimum tropical storm in a warmer climate. During the 1978 blizzard, permanent winds of 100 km/h (approximately 161 km/h) were recorded in Ohio along with a record low barometric pressure of 28.28 inches (71.83cm).
Another distinctive feature of the blizzards is reduced visibility. Although the visibility criteria change slightly from Earth on Earth, visibility during the blizzards often decreases to less than 1/4 mile (400 meters) for hours. During an intensification called white out, visibility can be reduced to almost zero. During the 1978 blizzard coverage, a television news crew, based in Cleveland, caught up in such a white broadcast during broadcasting a live news. Blizzards contain a heavy amount of dry white snow, which tends to create freely packed drifts.
Cold temperatures are not always required to qualify for serious winter storms as official blizzards, but Alev of some countries must fall below -13 ° F (-25 ° C). Although the ambient air temperature approaches 32 ° F (0 ° C), the high winds found in the Christmas may reduce the wind cold to the bitter cold. High wind mIt can also create a very large snow drifts that bury houses and cars within minutes. The landscape after a blizzard often resembles a faint sandy dune with large snow spots surrounded by thin spots of frozen soil.
Blizzards tend to form in regions known for turbulent meteorological systems and harsh winters, such as the northeast United States or parts of Canada, but it was known that several of them form in surprising places. For example, the 1993 blizzard influenced the areas south as Alabama and Florida. However, most of the blizzards in the United States usually in the area of large lakes or on the eastern Atlantic coast. The strong queue of the storm known as the Clipper Alberta launches a blizzard in large lakes, while the powerful Storms called Nor'easters create the conditions of a blizzard in the northeastern United States.