Wind can reach high speeds and height within a few hours or even minutes. In tornadoes, for example, winds reach up to 250 mph or higher. Tornadoes can be one mile long and fifty miles wide. Tornadoes are one of the worst types of wind and can cause many deaths. Thunderstorms, which often occur before tornadoes, can reach winds up to 100 mph. Although tornadoes are much more dangerous, thunderstorms occur more frequently and cause more damage.
Details from:
www.weathersafety.ohio.gov/TornadoDangersOfOverpasses2007.aspx - 13k
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