Allen Research Group

Hail - Tornadoes - Climate Variability - Extremes


Google Scholar Profile



Peer-Reviewed Publications

* Denotes graduate student advised by Dr. Allen


  1. Peters, J., Coffer, B., Parker, M., Nowotarski, C., Mulholland, J., Nixon*, C. and J. T. Allen, 2022: Disentangling the influences of storm-relative flow and horizontal streamwise vorticity on low-level mesocyclones in supercells. In Press, Journal of the Atmospheric Sciences. doi:

  2. Robertson, W., Kluver, D., Allen, J. T., E. Anderson, 2022: Meteotsunami Events and Hydrologic Response in an Isolated Wetland: Beaver Island in Lake Michigan, USA. In Press, JGR Oceans.doi: 10.1029/2022JC018611

  3. Nixon*, C., J., Allen, J. T., 2022: Distinguishing between Hodographs of Severe Hail and Tornadoes. In Press, Weather and Forecasting.doi: 10.1175/WAF-D-21-0136.1

  4. Elmore, K., Allen, J. T., Gerard, A., 2022: Sub-Severe and Severe Hail. In Press, Weather and Forecasting.doi: 10.1175/WAF-D-21-0156.1

  5. Pilguj, N., Taszarek, M., Allen, J. T., Hoogewind, K., 2022: Are Trends in Convective Parameters over the United States and Europe Consistent between Reanalyses and Observations? Journal of Climate, 35, 3605-3626. doi: 10.1175/JCLI-D-21-0135.1

  6. 2021

  7. Zhou, Z., Q. Zhang, J. T. Allen, X. Ni and C. Ng, 2021: How many types of severe hailstorm environments are there globally? Geophysical Research Letters, 48, e2021GL095485. doi: 10.1029/2021GL095485

  8. Lepore, C., Abernathy, R., Henderson, N., Allen, J. T., Tippett, M. K., 2021. Future Global Convective Environments in CMIP6 Models. Earth’s Future, 9, e2021EF002277. doi: 10.1029/2021EF002277

  9. McGovern, A., and J. T. Allen, 2021: Training the next generation of physical data scientists, EOS, 102. doi: 10.1029/2021EO210536

  10. Taszarek, M., Allen, J. T., Marchio, M. and H. E. Brooks, 2021: Global Climatology and Trends in convective environments from ERA5 and rawinsonde data. NPJ Climate and Atmospheric Science, 4, 1-11.

  11. Allen, J. T., E. R. Allen, H. Richter and C. Lepore, 2021: Australian Tornadoes in 2013: Implications for Climatology and Forecasting. Monthly Weather Review, 149, 1211-1232. doi: 10.1175/MWR-D-20-0248.1

  12. Murillo, E., Homeyer, C. and J. T. Allen, 2021: A 23-Year Severe Hail Climatology using GridRad MESH Observations. Monthly Weather Review, 149, 945-958.

  13. Taszarek, M., Pilluj, N., Allen, J. T., Gensini, V. A. Brooks, H. E., and P. Szuster, 2021: Comparison of convective parameters derived from ERA5 and MERRA2 with sounding data over Europe and North America. Journal of Climate, 34, 3211-3237. doi: 10.1175/JCLI-D-20-0484.1

  14. Nixon*, C. J., Allen, J. T., 2021: Anticipating Deviant Tornado Motion Using a Simple Hodograph Technique. Weather and Forecasting, 36, 219-235. doi: 10.1175/WAF-D-20-0056.1

  15. 2020

  16. Raupach, T. H, Martius, O., Allen, J. T., Kunz, M., Lasher-Trapp, S., Mohr, S., Rasmussen, K. L., Tippett, M. K., Trapp, R. J., and Q. Zhang, 2020: The effects of climate change on hailstorms. Nature Reviews Earth and Environment, 2, 213-226.

  17. Taszarek, M., Allen, J. T., Groenemeijer, P., Edwards, R., Brooks, H. E., Chmielewski, V., Enno, S., 2020: Severe Convective Storms Across Europe and the United States. Part 1: Climatology of lightning, large hail, severe wind and tornadoes. Journal of Climate, 33, 10239-10261. doi: 10.1175/JCLI-D-20-0345.1

  18. Taszarek, M., Allen, J. T., Pucik, T., Hoogewind, K., and H. E. Brooks, 2020: Severe Convective Storms Across Europe and the United States. Part 2: Environments accompanying lightning, large hail, severe wind and tornadoes. Journal of Climate, 33, 10263-10286. doi: 10.1175/JCLI-D-20-0346.1

  19. Taszarek, M., Allen, J. T., Brooks, H., Czernecki, B., N.Pilguj, 2020: Differing trends in United States and European severe thunderstorm environments in a warming climate. Bulletin of the American Meteorological Society, 1-51. doi: 10.1175/BAMS-D-20-0004.1

  20. Allen, J. T., I. M. Giammanco, M. R. Kumjian, H. J. Punge, M. Kunz, Q. Zhang, and P. Groenemeijer, 2020: Ice from above: Toward a better understanding of hailstorms, EOS, 101, Published 11th September 2020. doi:10.1029/2020EO148818.

  21. Molina*, M., Allen, J. T., A. Prein, 2020: Moisture Attribution and Sensitivity Analysis of a Winter Tornado Outbreak. Weather and Forecasting, 35, 1263-1288. doi: 10.1175/WAF-D-19-0240.1

  22. Lagerquist, R., Allen, J. T., and A. McGovern, 2020: Climatology and Variability of Warm and Cold Fronts over North America from 1979-2018. Journal of Climate, 33, 6531–6554, doi: 10.1175/JCLI-D-19-0680.1

  23. Ni, X., A. Muehlbauer, Allen, J. T., Q. Zhang, and J. Fan, 2020: Climatology of Maximum Hail Size and Extreme Value Analysis in China. Monthly Weather Review, 148, 1431–1447. doi:10.1175/MWR-D-19-0276.1

  24. Gensini, V., Barrett, B., Allen, J. T., Gold, D., and P. Sirvatka, 2020: The Extended-Range Tornado Acitivity Forecast (ERTAF) Project. Bulletin of the American Meteorological Society, 101, E700-709. doi: 10.1175/BAMS-D-19-0188.1

  25. Molina*, M., and J. T. Allen, 2020: Regionally-Stratified Tornadoes: Moisture Source Physical Reasoning and Climate Trends. Weather and Climate Extremes, 28, 1-13. doi: 10.1016/j.wace.2020.1002

  26. Allen, J. T., Q. Zhang, I. Giammanco, M. Kumjian, P. Groenemeijer, K. Ortega, M. Kunz, H. Punge 2020: Understanding Hail in the Earth System. Reviews of Geophysics, 57, doi: 10.1029/2019RG000665. (Invited Review Article).

  27. 2019

  28. Piper, D., M. Kunz, Allen, J. T., and S. Mohr, 2019: Investigation of the temporal variability of thunderstorms in Central and Western Europe and the relation to large-scale flow and teleconnection patterns. Quarterly Journal of the Royal Meteorological Society, 145, 1– 23. doi: 10.1002/qj.3647

  29. Gensini, V. A., Gold, D., Allen, J. T., and B. Barrett, 2019: Extended U.S. tornado outbreak during late May 2019: A forecast of opportunity. Geophysical Research Letters,46, 10150-10158. doi: 10.1029/2019GL084470

  30. Molina, M. J.* and Allen, J. T., 2019: On the Moisture Origins of Tornadic Thunderstorms. Journal of Climate., 32, 4321-4346. doi:10.1175/JCLI-D-18-0784.1

  31. Robertson, W. M., Allen, J. T., Wolaver, B. D., and J. Sharp, 2019: Aridland spring response to mesoscale precipitation: implications for groundwater-dependent ecosystem sustainability. Journal of Hydrology, 570, 850-862. doi: 10.1016/j.jhydrol.2018.12.074

  32. Taszarek, M., Allen, J. T., Púčik, T., Groenemeijer, P., Czernecki, B., Kolendowicz, L., Lagouvardos, K., and V. Kotroni, 2019: A climatology of thunderstorms across Europe from a synthesis of multiple data sources. Journal of Climate, 32, 1813-1837, doi: 10.1175/JCLI-D-18-0372.1

  33. Goebbert, K., Allen, J. T., Gensini, V. A., and M. Ramamurthy, 2018: Data driven scientific workflows: A summary of new technologies and datasets explored at the Unidata 2018 Workshop. Bull. Amer. Meteor. Soc., 100, ES97-ES99, doi:10.1175/BAMS-D-18-0265.1(Conference Report).

  34. 2018

  35. Molina, M. J.*, Allen, J. T., V. Gensini, 2018: The Gulf of Mexico and ENSO Influence on Subseasonal and Seasonal CONUS Winter Tornado Variability. Journal of Applied Meteorology and Climatology, 57, 2439-2463. doi: 10.1175/JAMC-D-18-0046.1

  36. Witt, A., D. Burgess, A. Seimon, J. T. Allen, J. C. Snyder, H. B. Bluestein, 2017: Rapid-scan Radar Observations of an Oklahoma Tornadic Hailstorm producing extremely large hail. Weather and Forecasting, 33, 1263–1282. doi: 10.1175/WAF-D-18-0003.1

  37. Lepore, C., M. K. Tippett, Allen, J. T., 2018: CFS seasonal short range forecasts for severe thunderstorms. Weather and Forecasting, 33, 1263-1282. doi: 10.1175/WAF-D-18-0054.1

  38. Edwards, R., J. T. Allen, and G. Carbin, 2017: Estimated convective winds: Reliability and Effects on Severe Storm Climatology. Journal of Applied Meteorology and Climatology, 57, 1825–1845. doi:10.1175/JAMC-D-17-0306.

  39. Allen, J. T., Molina, M. J.*, and, V. Gensini, 2018: Modulation of Annual Cycle of Tornadoes by El Niño-Southern Oscillation. Geophysical Research Letters, 45, doi: 10.1029/2018GL077482

  40. Allen, J. T., 2018: Climate Change and Severe Thunderstorms. Oxford Research Encyclopedia of Climate Science. 67pp. Ed.: Dr. Harold Brooks (Invited Review Paper) doi: 10.1093/acrefore/9780190228620.013.

  41. Childs, S., Schumacher, R., and J. T. Allen, 2018: Cold-season Tornadoes: Climatological and Meteorological Insights. Weather and Forecasting, 33,671-691. doi: 10.1175/WAF-D-17-0120.1

  42. Keul, A.G., Brunner, B., Allen, J. T., Bowden, K.A.,,Taszarek, M., Price, C., Soleiman, G.,Sharma, S., Roy, P., Aini, M.S., Elistina, A.B., Ab Kadir, M.Z.A.and C. Gomes, 2018: The International Severe Weather Survey. Weather Climate and Society. 10, 501-520, doi: 10.1175/WCAS-D-16-0064.1

  43. Gensini, V. A. & J.T. Allen, 2018: United States Hail Frequency and the Global Wind Oscillation. Geophysical Research Letters,45, 1611–1620.

  44. Bedka, K., J. T. Allen, H. Punge, M. Kunz, and D. Simanovic, 2018: A Long-Term Overshooting Convective Cloud Top Detection Database Over Australia Derived from MTSAT Japanese Advanced Meteorological Imager Observations. J. Appl. Meteor. Climate. 57,937–951, doi:10.1175/JAMC-D-17-0056.1

  45. 2017

  46. Allen, J. T., M. K. Tippett, Y. Kaheil, A.H. Sobel, C. Lepore, S. Nong, A. Muehlbauer, 2017: An Extreme Value Model for United States Hail Size. Monthly Weather Review, 145, 4501-4519. doi:10.1175/MWR-D-17-0119.1

  47. Lepore, C., M K. Tippett, and Allen J. T., 2017: ENSO-based probabilistic forecasts of March-May U.S. tornado and hail activity. Geophysical Research Letters, 44. doi: 10.1002/2017GL074781

  48. Allen, J. T., 2017: Atmospheric Hazards: Hail Potential Heating Up. Nature Climate Change, 7, 474-475, doi:10.1038/nclimate3327 (Invited Editorial)

  49. 2016

  50. Molina, M.*, Timmer, R. and J. T. Allen, 2016: The Gulf of Mexico’s contribution to United States Severe Thunderstorm Activity. Geophysical Research Letters, 43, 12,295–12,304, doi:10.1002/2016GL071603.

  51. Allen, J., M. Tippett, A. Sobel, and C. Lepore, 2016: Understanding the drivers of variability in Severe Convection: Bringing together the scientific and insurance communities. Bull. Amer. Meteor. Soc., 97, ES221–ES223. (Conference Report) doi:10.1175/BAMS-D-16-0208.1

  52. Seimon, A., J. T. Allen, T. Seimon, S. Talbot, D. Hoadley and E. Edwards, 2016: Crowd-sourcing the El Reno 2013 Tornado: A new approach for collation and display of storm chaser imagery for scientific applications. Bulletin of the American Meteorological Society, 97, 2069–2084. doi: 10.1175/BAMS-D-15-00174.1

  53. Allen, J. T., and E. R. Allen, 2016: A Review of Severe Thunderstorms in Australia. Atmospheric Research. 178-179, 347-366. (Invited Review Paper) doi: 10.1016/j.atmosres.2016.03.011

  54. Lepore, C., Allen, J. T., M. K. Tippett, 2016: Understanding the relationship between Extreme Precipitation and Atmospheric Variables over the Contiguous United States. Journal of Climate, 29, 3181-3197, doi: 10.1175/JCLI-D-15-0331.1

  55. 2015

  56. Allen, J. T., M. K. Tippett, 2015: The Characteristics of United States Hail Reports: 1955-2014. Electronic J. Severe Storms Meteor., 10(3), 1-31.

  57. Allen, J. T., M. Tippett and A. Sobel, 2015b: Influence of El Niño-Southern Oscillation on US hail and tornado frequency. Nature Geoscience, 8, 278-283. doi: 10.1038/NGEO2385

  58. Allen, J. T., M. Tippett and A. Sobel, 2015a: An empirical model relating United States monthly hail occurrence to large-scale meteorological environment. Journal of Advances in Modeling of Earth Systems, 7, 1-18. doi: 10.1002/2014MS000397

  59. Tippett, M., J. T. Allen, V. A. Gensini, and H. E. Brooks, 2015: Climate and Hazardous Convective Weather. Current Climate Change Reports, 1, 60-73, doi: 10.1007/s40641-015-0006-6. (Invited Review Paper)

  60. 2014

  61. Allen, J., D. Karoly, and K. Walsh, 2014b: Future Australian severe thunderstorm environments, Part II: The influence of astrongly warming climate on convective environments. J. Climate, 27, 3848-3868. doi:

  62. Allen, J., D. Karoly, and K. Walsh, 2014a: Future Australian severe thunderstorm environments, Part I: A novel evaluation andclimatology of convective parameters from two climate models for the late 20th century. J. Climate, 27, 3827-3868. doi:

  63. Tippett, M., A. Sobel, S. Camargo, and J. Allen, 2014: An empirical relation between U.S. tornado activity and monthly environmental parameters. J. Climate, 27, 2983-2999. doi:

  64. Allen, J. and D. Karoly, 2014: A Climatology of Australian Severe Thunderstorm Environments 1979-2011: Inter-annual Variabilityand the ENSO Influence. International Journal of Climatology. 34, 81–97. DOI: 10.1002/joc.3667

  65. Before 2014

  66. Allen, J. T., 2012: Supercell Storms: Melbourne’s White Christmas 2011. Bulletin of the Australian Meteorological and Oceanographic Society. 25, 47-51.

  67. Allen, J. T., , D. Karoly, and G. Mills, 2011: A severe thunderstorm climatology for Australia and associated thunderstorm environments. Australian Meteorological Oceanographic Journal, 61, 143-158.

  68. Allen, J. T., Pezza, A. B. and Black, M. T., 2010: Explosive Cyclogenesis: A Global Climatology Comparing Multiple Reanalyses. J. Climate, 23, 6468–6484. doi: 10.1175/2010JCLI3437.1