Hurricanes

If you didn't know, now you do:

23-39 mph wind speeds = Tropical Depression

40-74 mph wind speeds = Tropical Storm

74-95 mph wind speeds = Category I Hurricane

96-110 mph wind speeds = Category II Hurricane

111-130 mph wind speeds = Category III Hurricane

131-155 mph wind speeds = Category IV Hurricane

>155 mph wind speeds = Category V Hurricane

Data collected from http://www.weather.com/newscenter/hurricanecentral/2008/hanna.html