The Saffir-Simpson Hurricane Wind Scale
Category (1) Sustained wind speed (mph) Wind damage  Historical example
1 74-95 Very dangerous winds will produce some damage Hurricane Dolly, 2008, South Padre Island, Texas
2 96-110 Extremely dangerous winds will cause extensive damage Hurricane Frances, 2004, Port St. Lucie, Florida
3 111-129 Devastating damage will occur Hurricane Ivan, 2004, Gulf Shores, Alabama
4 130-156 Catastrophic damage will occur Hurricane Charley, 2004, Punta Gorda, Florida
5 157 or higher Catastrophic damage will occur Hurricane Andrew, 1992, Cutler Ridge, Florida
(1) Category 3 or higher storms are classified as "major." Source: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Hurricane Center.