The research reported here was supported by the National Science Foundation under Grants ATM-9313716 and ATM-9618684, as well as by a one-year graduate fellowship from the American Meteorological Society and ITT Aerospace Communications Division. National radar composite data were provided by the Global Hydrology Resource Center, NCEP reanalyses by the National Center for Atmospheric Research, and rawinsonde and wind profiler data by the National Climate Diagnostics Center. The authors wish to thank Mike Barth of Forecast Systems Laboratory for his kind input regarding wind profiler quality control, and to acknowledge Steven Rutledge for beneficial conversations regarding this work.
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