1. a School of Meteorology, University of Oklahoma, Norman, Oklahoma
2. b Cooperative Institute for Severe and High-Impact Weather Research and Operations, Norman, Oklahoma
3. c NOAA/OAR/National Severe Storms Laboratory, Norman, Oklahoma
4. d NOAA/NWS/NCEP/Storm Prediction Center, Norman, Oklahoma
5. e Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, Pennsylvania