Portions of the work presented in this manuscript were extracted from the first author’s M.S. thesis, which was completed with the help and advice of committee members Professors William Beasley and Frederick Carr of the School of Meteorology, University of Oklahoma. Discussions with Drs. Michael Douglas and Paul López, and Ronald Holle of the National Severe Storms Laboratory proved to be very beneficial. David Bright from the Tucson NWSFO, Douglas Green from the Phoenix NWSFO, and Charles Dempsey and Dr. Jon Skindlov both from SRP were all helpful in providing data and answering questions. Discussions with the NWS staff members at both the Phoenix and Tucson offices have been extremely valuable. The authors appreciate the suggestions of the reviewers; they have helped us focus and improve this paper. The Salt River Project and the Electric Power Research Institute under Contract W0397802 supported substantial portions of this work.
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