Tornadoes can occur any time in the year, although most common in April through June. It is very difficult to measure wind speeds in tornadoes, unlike hurricanes where planes can be flown over them due to their size. However, from observation, it is believed that tornado wind speeds can exceed 200 mph carrying trucks, buildings and uprooting trees in the air. They are so unpredictable and erratic and climatologists have yet to understand what causes tornadoes to touch down or explain the extreme wind speeds observed. Tornadoes rotate clockwise or anti-clockwise, unlike.
Hurricanes can spin off tornadoes.
A storm with sustained wind speeds 40-73 miles per hour. At this stage, the storm is assigned a name. If wind speeds exceeded 73 mph, the storm is upgraded to a hurricane. Storms with lower wind speeds are called tropical depressions . A storm or gale warning is issued for tropical storms depending on whether sustained wind speeds exceed the 54 mph wind speed or not, respectively.