How strong is gale force wind? Earth Science Weather Storms 1 Answer Trevor Ryan. Mar 9, 2016 At least 120km/hr or more Answer link Related questions Where are the strongest winds in a tropical storm? How is the strength of tropical storms measured? What is the eye wall and what causes it formation? How does the latent heat created due to precipitation formation aid in storm formation? What atmospheric conditions are necessary to produce tropical storms? How are hurricanes, typhoons, and tropical cyclones related? What are the necessry atmospheric conditions to produce a storm? What causes a storm to die out? What is a hurricane and how is it formed? Question #b09e8 See all questions in Storms Impact of this question 1869 views around the world You can reuse this answer Creative Commons License