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Weather service adjusts hurricane wind scale
The National Weather Service is adjusting the Saffir-Simpson Hurricane Wind Scale thresholds effective May 15, 2012. The scale will be adjusted slightly to resolve issues associated with the conversion of wind speed units.
There will be no change to wind speeds assigned to Category 1 and 2 storms. Category 3 and higher storms will see the follow changes.
Current categories:
Category 3: 111-130 mph (96-113 kt, 178-209 km/h)
Category 4: 131-155 mph (114-135 kt, 210-249 km/h)
Category 5: 156 mph or higher (136 kt or higher, 250 km/h or higher)
New categories:
Category 3: 111-129 mph (96-112 kt, 178-208 km/h)
Category 4: 130-156 mph (113-136 kt, 209-251 km/h)
Category 5: 157 mph or higher (137 kt or higher, 252 km/h or higher)



