The National Science Foundation and the National Aeronautics and Space Administration supported this research with Grants ATM 9618684, ATM 0071371, and NCC5-288 SUPP 0002. The bulk of this research was done while J. C. Knievel was at Colorado State University working with R. H. Johnson, whose guidance is deeply appreciated. Some of the text was organized during J. C. Knievel's postdoctoral appointment with D. P. Jorgensen at the National Severe Storms Laboratory in Boulder, Colorado. That appointment was awarded by the National Research Council.
Profiler data and code to read them are from S. B. Trier and C.-F. Shih of the National Center for Atmospheric Research; WSI's NOWrad radar data are from the Global Hydrology Resource Center; GCIP data are from the Joint Office for Scientific Support of the University Corporation for Atmospheric Research and the National Oceanic and Atmospheric Administration.
Contributions from the following people improved our research: P. C. Ciesielski, W. R. Cotton, C. A. Davis, M. T. Montgomery, M. D. Parker, J. A. Ramirez, and S. B. Trier. R. K. Taft and R. A. Hueftle provided computer support. Finally, thanks to the anonymous reviewers.
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