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7 PM sounding from Omaha on 19 May 2004.

CAP, CAP, CAP

20 May 2004 06:59 AM
Most of the multitude of storm chasers in Iowa yesterday were thwarted by a warm layer of air about a mile up in the atmosphere. The plot shows this warm layer (+12 C at 700 hPa). Updrafts have a tough time acquiring enough energy to punch through this layer to form storms.

Tags:   upperair   cap