Wednesday, April 6, 2011

Hurricanes and tornadoes

Hurricanes and tornadoes are two strong winds. Below is a table about the differences and similarities between hurricanes and tornadoes.
A hurricane can be predict 2-3 days in advance for a wide area and 6-10 hours beforehand, but a tornado can be predicted 20 minutes or less. The minimum wind speed for tornadoes it is 40 miles per hour, whereas hurricanes is 74 miles per hour. Hurricane has 300 miles of average width of storm and tornado has 100-600 meters sometimes up to 1.5 km wide. Hurricanes start over warm oceans whereas tornadoes start usually over land. The hurricane is classified on the Saffir-Simpson C1-c5, but the tornado is classified on the Fujita F0-F5. Finally, the average number per year for hurricanes is 100 worldwide and 20 minutes or less for tornadoes.

All in all, a tornado is a dangerous, rotating column of air which is in contact with both the surface of the earth and a cloud. Hurricanes can produce large waves and storm.

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