Kristin M Calhoun, NOAA / OAR / National Severe Storms Laboratory, Norman, OK, United States, Tiffany Meyer, University of Oklahoma and NOAA/National Severe Storms Laboratory, Cooperative Institute for Mesoscale Meteorological Studies, Norman, OK, United States and Darrel Kingfield, Cooperative Institute for Research in Environmental Sciences, NOAA/OAR/ESRL/Global Systems Division (GSD), Boulder, CO, United States