This material is based on work supported by the National Science Foundation under Grant 0097651. The authors thank the personnel of the Cooperative Institute for Mesoscale Meteorological Studies (CIMMS), the National Severe Storms Laboratory (NSSL), the National Weather Service (NWS), the Storm Prediction Center (SPC), and The Ohio State University (OSU) for their numerous discussions and reviews of this work. In particular, the authors greatly appreciate the assistance and input from the following individuals: Steven Amburn (NWS Tulsa), David Bright (SPC), Harold Brooks (NSSL), Matthew Bunkers (NWS Rapid City), Charles Doswell III (CIMMS), Jay Hobgood (OSU), Kenneth James (NWS Norman), Jacqueline Miller (OSU), Jeffrey Rogers (OSU), Bryan Smith (NWS Indianapolis), and two anonymous reviewers. Finally, the authors thank Daphne Zaras for her enormous efforts in running the National Weather Center Research Experiences for Undergraduates program.
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