Midlevel vorticity structure of the 10-11 June 1985 squall line

Abstract

Relative vertical vorticity in the stratiform region at midlevels was organized into bands (both cyclonic and anticyclonic) oriented parallel to the convective line, with anticyclonic vorticity between the rear of the convective line and the heaviest stratiform precipitation and cyclonic vorticity farther back. Since previous strudies have not found anticyclonic vorticity over such a large portion of the stratiform region at midlevels and since the concentration of anticyclonic vorticity may have been detrimental to the longevity of the storm by limiting the development of an inertially stable cyclonic circulation, the tilting and stretching terms of the vertical-vorticity equation were computed to determine how the observed vertical-vorticity pattern was maintained. -from Authors