Beaufort scale used in Taiwan and mainland China, which are often affected by typhoons. Internationally, WMO Manual on Marine Meteorological Services (2012 edition) defined the Beaufort Scale only up to force 12 and there was no recommendation on the use of the extended scale. Wind speed on the 1946 Beaufort scale is based on the empirical relationship: Where "v" is the equivalent wind speed at 10 metres above the sea surface and "B" is Beaufort scale number. For example, "B" = 9.5 is related to 24.5 m/s which is equal to the lower limit of "10 Beaufort". Using this formula the highest
Great Storm of 1854 was commanded to set up a storm warning system; this later developed into an international meteorological service. Though it is impossible to precisely calculate the strength or speed of the wind, estimates have placed it around force 11 on the Beaufort Scale. Great Storm of 1854 The Great Storm of 1854 (also known as the Balaklava Storm) occurred in and around the Black Sea on 14 November 1854. It caused severe damage and caused major disruption to armed forces (and especially naval forces) in the region engaged in the Crimean War. At the time of the storm, the British and