Stronger hurricanes have been given a statistical nudge starting this year. The Saffir-Simpson Hurricane Wind Scale, the Category 1, 2, 3, 4, 5 designation of the tropical cyclones, has been adjusted by the National Oceanic and Atmospheric Administration.
Category 3 hurricanes (formerly 111 mph to 130 mph) 111 mph to 129 mph.
Category 4 (131-155 mph) 130 mph to 156 mph.
Category 5 (156 mph or higher) 157 mph or higher.
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NOAA shifted the numbers because the scale operates on kilometers per hour rather than miles per hour, but hurricane advisories are issued in the more widely understood miles per hour. The conversion is easier with the new ranges, according to NOAA news release. The categories of historical storms will not change.