Mesocycline
Fig
•The rotating updraft, also called the mesocyclone, is located on the southwest side of the storm and typically ranges from about 5 to 10 km in diameter, and tilts northeastward with altitude.
•The top of the mesocyclone is called the overshooting top.
•The base of the mesocyclone is rain free, because precipitation is carried away by the strong updraft.