The authors wish to express our deep appreciation to Dr. Glen Lesins for his many helpful hours of guidance and suggestions to this research. Thanks also go to Drs. Eugenia Kalnay and Geoff DiMego for their leadership and continuous support of this work. The authors are very grateful to Drs. Thomas Black, Fedor Mesinger, Kenneth Mitchell, Eric Rogers, and Joseph Gerrity for their encouragement and suggestions. Special thanks go to Mr. Michael Baldwin for his help over the past several years. This research is a contribution from the National Science Foundation/National Meteorological Center Joint Program on Numerical Weather Prediction and was supported by NSF Grant ATM-8807752. The Center for Analysis and Prediction of Storms at the University of Oklahoma (NSF Grant ATM91-20009) is acknowledged for their support of the completion of this work.
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