Wind Shear

Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere. Wind shear can be broken down into vertical and horizontal components, with horizontal wind shear seen across fronts and near the coast, and vertical shear typically near the surface, though also at higher levels in the atmosphere near upper level jets and frontal zones aloft.

Wind shear itself is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, fronts, areas of locally higher low level winds referred to as low level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has a significant effect during take-off and landing of aircraft due to its effects on control of the aircraft, and it has been a sole or contributing cause of many aircraft accidents.

Sound movement through the atmosphere is affected by wind shear, which can bend the wave front, causing sounds to be heard where they normally would not, or vice versa. Strong vertical wind shear within the troposphere also inhibits tropical cyclone development, but helps to organize individual thunderstorms into longer life cycles which can then produce severe weather. The thermal wind concept explains how differences in wind speed at different heights are dependent on horizontal temperature differences, and explains the existence of the jet stream.

Read more about Wind ShearDefinition, Where and When It Is Strongly Observed

Other articles related to "wind shear, winds, wind, shear":

Cyclone Urmil (2006) - Meteorological History
... environment of favorable diffulence aloft, warm waters (29°C 84.2°F), and moderate wind shear ... storm, allowed Urmil to rapidly reach its peak intensity, despite wind shear reaching 35 km/h (25 mph) ... With both wind shear and forward motion increasing, the cyclone quickly became disorganized ...
Hurricane Jose (1999)
... However, wind shear quickly weakened the storm back to a Category 1 hurricane before it made landfall in Antigua ... Wind shear briefly decreased, allowing Jose to re-intensify into a hurricane while pass east of Bermuda on October 24 ... However, on the following day, wind shear increased again, while sea surface temperatures were decreasing, causing Jose to weaken and quickly transition into an extratropical cyclone ...
Cyclone Beni - Meteorological History
... Although further intensification was suppressed by wind shear and diurnal minimum, interaction with the ridge enabled the system to undergo a small clockwise loop ... the next day, the JTWC remarked that the storm had developed hurricane-force winds of 85 mph (135 km/h) ... Around that time, RMSC Nadi indicated that Beni had developed winds of a Category 4 cyclone ...
Wind Shear - Vertical Component - Planetary Boundary Layer - Effects On Architecture
... Wind engineering is a field of engineering devoted to the analysis of wind effects on the natural and built environment ... It includes strong winds which may cause discomfort as well as extreme winds such as tornadoes, hurricanes and storms which may cause widespread destruction ... Wind engineering draws upon meteorology, aerodynamics and a number of specialist engineering disciplines ...
Lake Effect Blizzard - Formation - Wind Shear
... Directional shear is one of the most important factors governing the development of squalls environments with weak directional shear typically produce more intense ... If directional shear between the surface and the height in the atmosphere at which the barometric pressure measures 700 mb (70 kPa) is greater than 60 degrees, nothing more than flurries can be expected ... If the directional shear between the body of water and the vertical height at which the pressure measures 700 mb (70 kPa) is between 30 and 60 degrees, weak lake-effect ...

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