noun
instantaneous wind speed; instantaneous wind velocity
Technical term used in meteorology and weather reports; refers to the wind speed measured over a very short interval (typically a few seconds), as opposed to average wind speed.
台風のとき、瞬間風速が50メートルを超えた。
During the typhoon, the instantaneous wind speed exceeded 50 meters per second.
天気予報で
The weather forecast is urging caution regarding instantaneous wind speeds.