Cumulonimbus and aviation at this altitude, updraughts with speeds that can exceed . Such an updraught speed corresponds to the wind speed of a small hurricane. The speed can even exceed . The maximum number in the Beaufort scale is 12 ("hurricane force" wind) and is assigned to wind speeds of 64 knots or greater. If the Beaufort scale were extended, these updraughts would have a Beaufort number of 14 "in the vertical direction". The turbulence is then "extreme" at this altitude. Moreover, the diameters of the updraught columns vary between 2 km (air mass thunderstorm) and 10 km (supercell thunderstorm). The height
Mount Storm Wind Farm Mount Storm Wind Farm The Mount Storm Wind Farm is located 120 miles west of Washington, D.C. in Grant County, West Virginia. The wind farm includes 132 Gamesa G80 wind turbines each with a two megawatt (MW) capacity along 12 miles of the Allegheny Front. Construction of the wind farm began in 2006 and the project is now fully operational, generating up to 264 MW of electricity for the mid-Atlantic power grid. Nedpower Mount Storm, LLC is a joint venture between Shell and Dominion Resources, founded in 2007. Plans for the farm were first announced in 2001, when U.S. Wind