|of these articles treats the storm as meteorological phenomenon, further meanings under storm (term clarifying)|
a storm marks hoist with speeds of at least 20.8 m/s (74.9 km/h) or 9 Beaufort. A storm with wind velocities of at least 32.7 m/s or 12 Beaufort is called gale. Between them one speaks with 10 Beaufort of a heavy and with 11 Beaufort of a gale-like storm. Reaches the wind only briefly (for few, Then one speaks seconds) of storm strength of a storm gust.
Can for storm hoist develop, if high pressure gradients (high differences of pressure on relatively short distance) arise. These are frequently in the sphere of influence of strong Tiefdruckgebiete present. Furthermore storm hoist through topographically caused canalization of the wind can develop,for example as Talwind in close valleys.
Usually connected also strong rainfalls are, why the designation is used often falsely as synonym for a heavy shower or a thunderstorm , both place however only accompaniments and/or with a storm.Special cases of a storm. On lake likewise the designation is storm common, with a smaller stress on the usually simultaneous precipitation for wind-causes high wave course. Depending on, which a storm whirls up and/or. with which it arises together, one speaksthe moreover one of a snow -, hail, sand - or Staubsturm. Also a distinction after the season is used, one speaks sometimes then for example of a winter tower.
Storms arise frequently over the sea , there there less Soil friction is present. So can unfold better the hoist than on the mainland and reach therefore substantially frequent storm strength. Besides can develop tropical eddy towers, thus hurricanes and Taifune, only over the sea and weaken themselves over land massesrapidly off.
dangers and damage
direct storm damages concern above all a taking off of roofs or other wind shipping, with forest-rich areas come the damage by upset trees in addition (storm wood).Of importance also the indirect damage is, for example by the deposits of sand on agriculture surfaces with a sandstorm or many insurance companies pays a storm damage thereby only if the wind as can be prove wind force 8 (stormy wind, the insurance term “storm” is heremisleading) reached.
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