The hurricanes are in tropical regions where the waters are warm (27 ° C), the air is damp and the equator winds converge. Most Atlantic hurricanes start with a thunderstorm in the western coast of Africa and move towards warm tropical ocean waters. This thunderstorm turns into a hurricane in three stages:
Tropical low pressure - rotating clouds and rain, the speed of the wind is under 38 miles per hour.
Tropical storm - from 39 to 74 mph winds.
Hurricanes - winds that are greater than 74 degrees per hour.
The thunderstorm turns into a hurricane for a few hours to a few days. Although the reasons for the formation of the whirlwind are still not completely known, the following three events must occur in the whirlwind formation:

• Warm moist ocean air is in the constant evaporation-condensation cycle
• Strong wind pattern merging on the surface, winds that do not change speed in high places.
• There is a difference between the surface and the air pressure (pressure gradient) at high places. @greenrun