Saturday, December 25, 2010
hurricanes and tornadoes: table
This table shows the difference between two strong types of wind, hurricanes and tornadoes.
Hurricanes have a higher minimum wind speed of 74mph and only 40mph for tornadoes; but a lower maximum speed. In classification scales both have their own classification system; hurricanes classified by Saffir – Simpson’s c1-c5 scale and tornadoes scaled by Fujita f0-f5. A hurricane’s duration is, on average, one week and it’s always more than the tornadoes whose duration is mostly a few minutes or sometimes up to a few hours. The average width of hurricanes is greater than the tornadoes width usually. Hurricanes average number per year is a hundred but tornadoes occur twenty times per year. To predict a hurricane you need about two to three days but tornadoes happen suddenly and you can predict them it only twenty minutes before they occur. Tornadoes usually start over land and hurricanes starts over warm oceans.
In brief hurricanes can be predicted so we can prepare for them before they come but tornadoes occur suddenly and when they hit they destroy everything in thier way.
178 words
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