Blizzards are caused when warm air collides with very cold air. For a blizzard to form, the air temperature should be near or below the freezing point of water. A blizzard has sustained wind speeds of 35 miles per hour o... More »

The weight of the fallen snow during a blizzard may collapse roofs or bring down trees, power lines or telephone lines. The snow also may result in dangerous driving and whiteout conditions, leading motorists to get into... More »

Clouds that produce precipitation as rain or snow are called frontal cirrostratus, altostratus and nimbostratus clouds. Nimbostratus clouds produce the most intense precipitation but don't produce all the elements that c... More »

Major blizzards in U.S. history include those from March 11 to 14, 1888; January 27 to 28, 1922; February 5 to 7, 1978; January 6 to 10, 1996; December 26 to 27, 2010; and March 12 to 15, 1993. The storm from March 12 to... More »

Rains, overflowing rivers, ruptured dams, and melting water from snow and ice may all result in flooding that produces harmful economic and environmental effects. Tsunamis, earthquakes and even strong tidal flows may als... More »

Typhoons are caused by the cycle of warm air heated by the warm sea water rising, cooling and then being pushed aside by more warm air rising from below. This cycle causes strong winds as air rises quickly when heated by... More »

Warm water and warm air found in the tropics and converging winds form the ideal basis for hurricane formation. Some scientists speculate that changes in temperature may also contribute to the process and that global war... More »