Tuesday, April 22, 2008

V-shape on satellite

An intense updraft lifts moisture high into the troposphere and strong upper level divergent winds move the extremely cold moisture (ice crystals) downwind. The moisture fans out as it moves downwind generating a V-shape of the cloudiness on a satellite image (see the cell situated in the South of Romania). The image (Eumetsat) was taken at at 16 UTC. The movement was from south to north so soon Bucharest was affected by the storm. The radar image shows the intense reflectivity (over the Bulgarian teritory). In this case, the satellite image provided more information about the severity of the system (strong updraft, V-shape).

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