We are very grateful to the Oklahoma Mesonet for providing the quality-controlled surface data used as the foundation of this research. The first author (NAE) thanks the NOAA Hollings Scholar program for providing the funding to spend a summer working on this project at the NSSL. Very constructive and helpful comments from Paul Markowski, Matt Parker, and an anonymous reviewer are greatly appreciated. Composite radar images were obtained online (http://www.mmm.ucar.edu/imagearchive/). Partial funding was provided by NOAA/Office of Oceanic and Atmospheric Research under NOAA/University of Oklahoma Cooperative Agreement NA17RJ1227, U.S. Department of Commerce.
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