Early on October 19, Wilma attained major hurricane status while continuing to rapidly intensify, and by 0600 UTC, the storm's maximum sustained winds increased to 170 mph (275 km/h), making Wilma a dangerous Category 5 hurricane on the Saffir-Simpson Hurricane Scale. In the span of just 24 hours, Wilma had intensified from a 70-mph (110-km/h) tropical storm to a 175-mph (280-km/h) Category 5 hurricane, an event that has never happened before for an Atlantic hurricane. The eye continued to contract to a diameter of about 3 miles (5 km), the smallest known eye in an Atlantic hurricane, and at 1200 UTC on October 19, Wilma reached peak winds of 185 mph (300 km/h). The central pressure quickly dropped 54 mbar (1.65 inHg) from 0000 to 0600 UTC.