Severe Convective Storms

Severe convective storms produce a number of hazards to life, property, and agriculture. These include tornadoes, hail, damaging winds, flash floods, and lightning.

Severe convective storms and their hazards

Severe convective storms and their hazards

I am particularly interested in supercell storms, as these produce a disproportionate number of high-impact events such as violent tornadoes and giant hail.

My research interests include identifying and using polarimetric radar signatures in severe storms to understand the storm behavior, modeling of supercell storms and precipitation processes within them, and radar-based detection and sizing of hail.

Simulated hailstorm with hail growth trajectory.


Below is a list of my publications on severe storms and severe storm microphysics:

Jiang*, Z., M. R. Kumjian, R. S. Schrom*, I. Giammanco, T. Brown-Giammanco, H. Estes, R. Maiden, and A. Heymsfield, 2019: Comparisons of electromagnetic scattering properties of real hailstones and spheroids. Journal of Applied Meteorology and Climatology58, 93-112. pdf

Kumjian, M. R., Y. Richardson, T. Meyer, K. Kosiba, and J. Wurman, 2018: Resonance scattering effects in wet hail observed with the dual-X-band-frequency, dual-polarization Doppler on Wheels radar. Journal of Applied Meteorology and Climatology, 57, 2713-2731. pdf

Loeffler*, S., and M. R. Kumjian, 2018: Quantifying the separation of enhanced ZDR and KDP regions in nonsupercell tornadic storms. Weather and Forecasting33, 1143-1157. pdf

Li*, M., F. Zhang, Q. Zhang, J. Harrington, and M. R. Kumjian, 2017: Nonlinear response of hail precipitation rate to environmental moisture content: a real case modeling study of an episodic midlatitude severe convective event. Journal of Geophysical Research – Atmospheres122, 6729-6747. pdf

Dennis*, E. J., and M. R. Kumjian, 2017: The impact of vertical wind shear on hail growth in simulated supercells. Journal of the Atmospheric Sciences74, 641-663pdf

Snyder, J.C., A.V. Ryzhkov, M.R. Kumjian, A.P. Khain, and J.C. Picca, 2015: A ZDR column detection algorithm to examine convective storm updrafts. Weather and Forecasting30, 1819-1844pdf

Markowski, P.M., Y.P. Richardson, M.R. Kumjian, A. Anderson-Frey, G. Jimenez, B. Katona, A. Klees, R. Schrom, and D. Tobin, 2015: Comments on “Observations of wall cloud formation in supercell thunderstorms during VORTEX2.” Monthly Weather Review143, 4278-4281pdf

Kumjian, M.R., Z.J. Lebo, and H.C. Morrison, 2015: On the mechanisms of rain formation in an idealized supercell storm. Monthly Weather Review143, 2754-2773. pdf

Homeyer, C.R., and M.R. Kumjian, 2014: Microphysical characteristics of overshooting convection from polarimetric radar observations. Journal of the Atmospheric Sciencesin press.

Kumjian, M.R., A. P. Khain, N. Benmoshe, E. Ilotoviz, A.V. Ryzhkov, and V. T. J. Phillips, 2014: The anatomy and physics of ZDR columns: Investigating a polarimetric radar signature with a spectral bin microphysical model. Journal of Applied Meteorology and Climatology53, 1820-1843. pdf

Dawson, D.T., E.R. Mansell, Y. Jung, L.J. Wicker, M.R. Kumjian, and M. Xue, 2014: Low-level ZDR signatures in supercell forward flanks: the role of size sorting and melting of hail. Journal of the Atmospheric Sciences71, 276-299. pdf

Ryzhkov, A.V., M.R. Kumjian, S.M. Ganson, and P. Zhang, 2013: Polarimetric radar characteristics of melting hail. Part II: Practical applications. J. Applied Meteorology and Climatology52, 2871-2886pdf

Ryzhkov, A.V., M.R. Kumjian, S.M. Ganson, and A.P. Khain, 2013: Polarimetric radar characteristics of melting hail. Part I: Theoretical simulations using spectral microphysical modeling. J. Applied Meteorology and Climatology52, 2849-2870pdf

Bodine, D.J., M.R. Kumjian, R.D. Palmer, P.L. Heinselman, and A.V. Ryzhkov, 2013: Tornado damage estimation using polarimetric radar. Weather and Forecasting28, 139-158. pdf

Kumjian, M.R., S. Gansonand A.V. Ryzhkov, 2012: Raindrop freezing in deep convective updrafts: A microphysical and polarimetric model. Journal of the Atmospheric Sciences69, 3471-3490pdf

Crowe, C.C., C.J. Schultz, M.R. Kumjian, L.D. Carey, and W.A. Petersen, 2012: Use of dual-polarization signatures in diagnosing tornadic potential.  Electronic Journal of Operational Meteorology13(5), 57-78pdf

Kumjian, M.R., 2011: Precipitation properties of supercell hook echoes.  Electronic Journal of Severe Storms Meteorology6(5), 1-21pdf

Palmer, R.D., D. Bodine, M.R. Kumjian, B. Cheong, G. Zhang, Q. Cao, H.B. Bluestein, A. Ryzhkov, T.-Y. Yu, and Y. Wang, 2011: Observations of the 10 May 2010 tornado outbreak using OU-PRIME: Potential for new science with high-resolution polarimetric radar. Bulletin of the American Meteorological Society, 92, 871-891pdf

Kumjian, M.R., A.V. Ryzhkov, V.M. Melnikov, and T.J. Schuur, 2010: Rapid-scan super-resolution observations of a cyclic supercell with a dual-polarization WSR-88D.  Monthly Weather Review138, 3762-3786. pdf

Kumjian, M.R. and A.V. Ryzhkov, 2009:  Storm-relative helicity revealed from polarimetric radar observations.  Journal of the Atmospheric Sciences66, 667–685. pdf

Kumjian, M.R. and A.V. Ryzhkov, 2008: Polarimetric signatures in supercell thunderstorms. Journal of Applied Meteorology and Climatology47, 1940-1961. pdf

Kumjian, M.R. and B.H. Fiedler, 2007: The efficacy of subsidence warming in tornadoes.  Conference NotebookBulletin of the American Meteorological Society88, 1538-1539.