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
USS Beaufort (ATS-2) towing to Ream, Cambodia. Beaufort departed Naha on August first and shaped a course for Ream, however Beaufort encountered a storm and all three barges broke their tow lines so Beaufort Gunnersmates sank all three barges so they were not floating around the open ocean. While in Ream Beaufort came under attack from the jungle. Gunnersmates Day, Kelley Reed, and Seabo returned fire with the 50 caliber machine guns. At the time there was a disabled Cambodian ship so the Captain of the Beaufort directed the Captain of the Cambodian ship, and a minor argument ensued the Captain of the