Wednesday, April 6, 2011

Hurricanes and tornadoes.


The table shows the differences between two very strong winds, hurricanes and tornadoes.

There are many features of the winds. The minimum wind speed for hurricanes is 74 miles per hour, whereas for tornadoes it is 40 miles per hour. However the maximum wind speed for hurricanes is between 155 to 200 miles per hour, whereas tornadoes have got 250 to 300 miles per hour. The hurricane classification scale is the Saffir, Simpson C1to C5, whereas the tornadoes classification scale is the Fujita F0 to F5. Hurricanes can last one week on average, but tornadoes only last a few minutes or sometimes up to a few hours. In addition a hurricane has 300 miles of average width of storm. However tornadoes have 100 to 600 meters and some up to 1.5 km wide. Hurricanes can usually be predicted in advance, whereas tornadoes can’t. Finally, hurricanes start over warm oceans, but tornadoes usually start over land.

Overall, I think that the tornadoes are much more dangerous than hurricanes and the maximum wind also for the tornadoes is higher than for hurricanes.

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