The structure of a cyclone Contains the spiral arms of clouds accumulator Nimbus cloud formation, which is vertical to become thunderstorm Clouds. It rotate counterclockwise around the center to causing the rain (Rainbands) at the center of the cyclone which is called a "Eye" where it have low pressure which cloudless sky. Wall eye of the storm (Eyewall) is a large circular cloud lifted vertically and has spread out through the thick clouds which surround Russell (Dense Cirrus Overcast), covered ring cell thunderstorm clouds below.