Snow trails: Difference between revisions

Revision as of 15:08, 20 February 2012

snow trails

(Also called streamers.) The trails of precipitation that emerge from the base of generating cells typically observed on time–height displays from vertically pointing radars.

Snow trails are also commonly observed on range–height indicator displays. Snow trails emerge from a layer of convective instability that often exists in the middle or upper troposphere in widespread storms. Small convective cells developing within this layer produce the ice crystals that then fall to lower altitudes. The base of the convectively unstable layer is called the snow- generating level. The shape and vertical extent of the streamers depend on the vertical profiles of wind and relative humidity in the layer through which the precipitation falls.

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-<div class="definition"><div class="short_definition">(<br/>''Also called'' streamers.) The trails of [[precipitation]] that emerge from the base of generating  cells typically observed on time&ndash;height displays from vertically pointing radars.</div><br/> <div class="paragraph">Snow trails are also commonly observed on [[range&ndash;height indicator]] displays. Snow trails emerge  from a layer of [[convective instability]] that often exists in the middle or upper [[troposphere]] in  widespread storms. Small convective cells developing within this layer produce the [[ice crystals]]  that then fall to lower altitudes. The base of the convectively unstable layer is called the [[snow-  generating level]]. The shape and vertical extent of the streamers depend on the vertical profiles  of [[wind]] and [[relative humidity]] in the layer through which the precipitation falls.</div><br/> </div>
+<div class="definition"><div class="short_definition">(''Also called'' streamers.) The trails of [[precipitation]] that emerge from the base of generating  cells typically observed on time&ndash;height displays from vertically pointing radars.</div><br/> <div class="paragraph">Snow trails are also commonly observed on [[range&ndash;height indicator]] displays. Snow trails emerge  from a layer of [[convective instability]] that often exists in the middle or upper [[troposphere]] in  widespread storms. Small convective cells developing within this layer produce the [[ice crystals]]  that then fall to lower altitudes. The base of the convectively unstable layer is called the [[snow-  generating level]]. The shape and vertical extent of the streamers depend on the vertical profiles  of [[wind]] and [[relative humidity]] in the layer through which the precipitation falls.</div><br/> </div>
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