Interaction with Thunderstorm Outflow
a short-lived example

This fearsome looking wall cloud to our northwest did occur with a severe thunderstorm which produced golf ball size hail and strong winds. However, within 10 minutes the wall cloud began to break up as cold outflow undercut it.

Photograph by: Moller

Note the tendency for the same wall cloud to look more disorganized as it "gusted out," or was undercut by outflow.

Photograph by: Doswell

In addition to the lack of persistence, the wall cloud exhibited little if any rotation. It completely disappeared within another 5 minutes.

beneath CB towers
Terms for using data resources. CD-ROM available.
Credits and Acknowledgments for WW2010.
Department of Atmospheric Sciences (DAS) at
the University of Illinois at Urbana-Champaign.

cyclic wall clouds