The scale is based only on a storm's maximum sustained wind speed without accounting for additional hazards like storm surge, flooding and tornadoes, which, weather officials say, can occur as a result of hurricanes that fall within any of its five categories. A Category 1 hurricane refers to...
The maximum wind speed sustained was 18 m s−1. The closest the typhoon center got to the mooring was 285.9 km, which exceeded its radius of 150 km. The large distance between the typhoon center and the mooring, as well as the low maximum wind speed probably made the NIO event ...