Funding for the analysis of data from IPEX was provided by National Science Foundation Grant ATM-0085318 and a series of grants provided by the National Weather Service C-STAR program to the NOAA Cooperative Institute for Regional Predication at the University of Utah. We would like to thank all the individuals and organizations who participated in the planning and execution of IPEX. Thanks also to the staff of the NOAA Aircraft Operations Center for their efforts in collecting airborne observations, the University of Oklahoma for providing the DOW units, the National Severe Storms Labs for operating the mobile labs, and Dick Oye of the National Center for Atmospheric Research for his assistance in the dual-Doppler analysis. Comments and suggestions provided by Larry Dunn, Mark Jackson, John Marwitz, David Schultz, and one anonymous reviewer greatly improved the manuscript.
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