Maximum sustained wind 50% of the geostrophic wind speed aloft; while over open water or ice, the reduction is between 10% and 30%. In most basins, maximum sustained winds are used to define their category. In the Atlantic and northeast Pacific oceans, the Saffir–Simpson scale is used. This scale can be used to determine possible storm surge and damage impact on land. In most basins, the category of the tropical cyclone (for example, tropical depression, tropical storm, hurricane/typhoon, super typhoon, depression, deep depression, intense tropical cyclone) is determined from the cyclone's maximum sustained wind. Only in Australia is this quantity not used to
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