Dr. Jeff Trapp - Department of Earth, Atmospheric, and Planetary Sciences - Purdue University Skip to main content

Dr. Jeff Trapp

Dr. Jeff Trapp

Professor, Associate Head
Curriculum Vitae
Associated Website(s): Group Website, Climate & Extreme Weather (CLEW), Purdue Climate Change Research Center (PCCRC)


Ph.D. ­ University of Oklahoma

Research Interests
Dynamics and observations of mesoscale convective systems, severe thunderstorms, and tornadoes; mesoscale modeling and predictability.

Teaching Interests


  • EAS 221:  Introduction to the Atmospheric Sciences
  • EAS 422:  Atmospheric Dynamics I
  • EAS 434:  Weather Analysis and Forecasting
  • EAS 523:  Radar Meteorology
  • EAS 636:  Mesoscale-Convective Processes in the Atmosphere

Selected Publications

  • Kosiba, K. A., R. J. Trapp, and J. Wurman, 2008: An analysis of the axisymmetric three-dimensional low level wind field in a tornado using mobile radar observations. Geophysical Research Letters, 35, L05805, doi:10.1029/2007GL031851.
  • Trapp, R. J., N. S. Diffenbaugh, H. E. Brooks, M. E. Baldwin, E. D. Robinson, and J. S. Pal, 2007: Changes in severe thunderstorm environment frequency during the 21st century caused by anthropogenically enhanced global radiative forcing. Proceedings, National Academy of Sciences, 104, 19719-19723, doi: 10.1073/pnas.0705494104.
  • Moore, G. E., M. Levine, J. D. Anderson, and R. J. Trapp, 2007: Meteorological influence on the occurrence of gastric dilatation-volvulus in military working dogs in Texas. International Journal of Biometeorology, doi:10.1007/s00484-007-0115-6.
  • Trapp, R. J., B. Halvorson, and N. S. Diffenbaugh, 2007: Telescoping, multimodel approaches to evaluate extreme convective weather under future climates, Journal of Geophysical Research, 112, D20109, doi:10.1029/2006JD008345.
  • Schultz, D. M., K. M. Kanak, J. M. Straka, R. J. Trapp, B. A. Gordon, D. S. Zrnic, P. M. Kastner-Klein, C. A. Doswell III, G. H. Bryan, D. K. Lilly, and T. J. Garrett, 2006: The mysteries of mammatus clouds: Observations and formation mechanisms. Journal of the Atmospheric Sciences, 63, 2409-2435.
  • Trapp, R. J., D. M. Wheatley, N. T. Atkins, R. W. Przybylinski, and R. Wolf, 2006: Buyer beware: Some words of caution on the use of severe wind reports in post-event assessment and research. Weather and Forecasting, 21, 408-415.
  • Wheatley, D. M, R. J. Trapp, and N. T. Atkins, 2006: Radar and Damage Analysis of Severe Bow Echoes Observed during BAMEX, Monthly Weather Review, 134, 791-806.
  • Diffenbaugh, N. S., J. S. Pal, R. J. Trapp, and F. Giorgi, 2005:Interactions of large- and fine-scale processes dictate the greenhouse response of extreme daily climate events over the United States. Proceedings, National Academy of Sciences, 102, 15774-15778.
  • Trapp, R. J., G. J. Stumpf, and K. L. Manross, 2005: A reassessment of the percentage of tornadic mesocyclones. Weather and Forecasting, 20, 680-687.
  • Atkins, N. T., C. S. Bouchard, R. W. Przybylinski, R. J. Trapp, and G. Schmocker, 2005: Damaging surface wind mechanisms within the 10 June 2003 Saint Louis bow echo event during BAMEX. Monthly Weather Review, 133, 2275–2296.
  • Trapp, R. J., S. A. Tessendorf, E. G. Savageau, and H. E. Brooks, 2005: Tornadoes in squall lines and bow echoes. Part I: Climatological distribution. Weather and Forecasting, 40, 23-34.
  • Davis, C., N. Atkins, D. Bartels, L. Bosart, M. Coniglio, G. Bryan, W. Cotton, D. Dowell, B. Jewett, R. Johns, D. Jorgensen, J. Knievel, K. Knupp, W.-C. Lee, G. McFarquahar, J. Moorse, R. Przybylinski, R. Rabuer, B. Smull, R. Trapp, S. Trier, R. Wakimoto, M. Weisman, and C. Ziegler, 2004: The Bow Echo and MCV Experiment: Observations and Opportunities. Bulletin of the American Meteorological Society, 85, 1075-1092.
  • Weisman, M. L., and R. J. Trapp, 2003: Low-level mesovortices within squall lines and bow echoes: Part I. Overview and dependence on environmental shear. Monthly Weather Review, 131, 2779-2803.

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