Discussions with Drs. Rich Rotunno, Brian Fiedler, and Bob Davies-Jones were instrumental in helping the author “clarify” his thoughts on this topic. Additional comments by Dr. Chuck Doswell and two anonymous reviewers led to further improvements in the manuscript. The work was performed while the author was a visiting scientist with the Mesoscale and Microscale Meteorology Division of the National Center for Atmospheric Research. The National Center for Atmospheric Research is sponsored by the National Science Foundation.
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