1. School of Meteorology, University of Oklahoma, Norman, OK, USA
2. Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT 84112-0102, USA
3. Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, USA
4. Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA
5. Oklahoma Climatological Survey, Norman, OK, USA