A measure of wind shear from the mid-levels of the atmosphere to the surface layer. Deep layer shear above a specific level (35knots) often leads to mid-level mesocyclones associated with supercell thunderstorms. (Wind Shear) Variation in wind speed and/or direction over a short distance. Shear usually refers to vertical wind shear, i.e., the change in wind with height, but the term also is used in Doppler radar to describe changes in radial velocity over short horizontal distances.
Tweet Vote on HN Some severe storms hit St Clair during the afternoon with hail, very heavy rain and some […]
Tweet Vote on HN Insane Supercell Structure Dumas, Texas May 18 2010 Impressive Supercell in the Texas Panhandle near Dumas […]