The eye of a hurricane can range in size from 5 miles to over 120 miles, but most average 20 to 40 miles, according to Louisiana Homeland Security and Emergency Preparedness. The eye is an area of calm with light winds at the center of a severe tropical storm.
The eye of the hurricane begins to form once the winds reach approximately 80 miles per hour. It is circular when viewed from above and has a cylindrical shape when viewed in cross-section. The eye is surrounded by the eyewall, which is composed of a ring of thick cumulonimbus clouds. The strongest winds are found here, making the eyewall the most dangerous and severe part of a hurricane