Funding for the authors was provided under NOAA–OU Cooperative Agreement NA17RJ1227. The authors thank Kiel Ortega, Kevin Manross, John Cintineo, and Jennifer Newman for all their help and advice. The authors also thank Gabe Garfield, Kiel Ortega, and Brandon Smith for allowing us to use their damage survey data for the 24 May 2011 tornadoes.
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