Wednesday, April 6, 2011

Hurricanes and Tornadoes

The table shows the differences between hurricanes and tornadoes by seven features.
            The minimum wind speed of hurricanes is 74mph and 40 mph for tornadoes. The maximum wind speed of the most severe storms of hurricanes is between 155 and 200 mph, but between 250 and 300 mph for tornadoes. The classification scale is the Saffier, Simpson C1 and C5 for hurricanes and the Fujita F0 and F5 for tornadoes. The hurricanes take 1 week on average but only a few minutes to a few hours for tornadoes. The average width of hurricanes is 300 miles but only 100 to 1.5 km wide for tornadoes. The hurricanes last from 2 to 3 days but 20 minutes maximum for tornadoes. The hurricanes starts over warm oceans but tornadoes start usually over land.
            The table shows that hurricanes are not stronger than tornadoes but hurricanes last longer than tornadoes. Hurricanes start over oceans but tornadoes start over land.

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