LYCOS RETRIEVER 
Tornadoes: Warnings
built 200 days ago
Tornadoes are one of weathers most deadly and fascinating forces. Even though they are often limited by size (not being more than one kilometer wide at most) they leave vast areas of destruction and death behind them. They are ... called twisters or cyclones.
Source:
Tornadoes move at speeds of about 10 to 20 miles (16 to 32 kilometers) per hour, although they've been clocked in bursts up to 70 miles (113 kilometers) per hour. Most don’t get very far though. They rarely travel more than about six miles (ten kilometers) in their short lifetimes.
Source:
Tornadoes emit widely on the acoustics spectrum and the sounds are cased by multiple mechanisms. Various sounds of tornadoes have been reported throughout time, mostly related to familiar sounds for the witness and generally some variation of a whooshing roar. Popularly reported sounds include a freight train, rushing rapids or waterfall, a jet engine from close proximity, or combinations of these. Many tornadoes are not audible from much distance; the nature and propagation distance of the audible sound depends on atmospheric conditions and topography.
Source:
Tornadoes are most common and strongest in temperate latitudes, and in the U.S. they tend to form most frequently in the early spring; the tornado season shifts toward later months with increasing latitude. The number of funnels observed each year can vary greatly in any given region.
Source:
The special fund that the American Red Cross uses to help victims of hurricanes, tornadoes and other natural disasters has run out of money, officials said yesterday. [ Full Story ]
Source:
Tornadoes in Iowa Injure at Least 10: "Tornadoes swept through… northeastern Iowa… The twisters… cut a swath about 10 miles wide… 'Fortunately, it did not go through any densely populated areas,'" said Black Hawk County Sheriff's Deputy Tony Thompson. AP, 5/15/00
Source:
MORE ABOUT
Warnings