We sincerely acknowledge the editor and the anonymous reviewers for their valuable suggestions to improve the manuscript.
Bezdek, J. C., J. Keller, R. Krishnapuram, and N. R. Pal, 2005: Fuzzy Models and Algorithms for Pattern Recognition and Image Processing. Kluwer Academic, 776 pp.
Crum, T., and R. Alberty, 1993: The WSR-88D and the WSR-88D operational support facility. Bull. Amer. Meteor. Soc., 74 , 1669–1687.
Delgado, M., A. F. Gomez-Skorneta, and F. Martin, 1997: A fuzzy clustering-based rapid prototyping for fuzzy rule-based modelling. IEEE Trans. Fuzzy Syst., 5 , 223–233.
Donaldson, R., R. Dyer, and M. Krauss, 1975: An objective evaluator of techniques for predicting severe weather events. Preprints, Ninth Conf. on Severe Local Storms, Norman, OK, Amer. Meteor. Soc., 321–326.
Dostalek, J. F., J. F. Weaver, and G. L. Phillips, 2004: Aspects of a tornadic left-moving thunderstorm of 25 May 1999. Wea. Forecasting, 19 , 614–626.
Howard, K., and J. Gourley, 1995: Evaluating the magnitude of uncertainties in WSR-88D measurements and measuring this impact on storm attribute trends—An initial study. National Severe Storms Laboratory Tech. Rep.
Lakshmanan, V., 2000: Using a genetic algorithm to tune a bounded weak echo region detection algorithm. J. Appl. Meteor., 39 , 222–230.
Lakshmanan, V., and A. Witt, 1996: Detection of bounded weak echo regions in meteorological images. Proc. IAPR’96, Vienna, Austria, IAPR, 895–899.
Lemon, L. R., 1980: Severe storms radar identification techniques and warning criteria. National Severe Storms Forecast Center Tech. Rep. NWS NSSFC-3, 35 pp.
Markowski, P. M., 2002: Surface thermodynamic characteristics of hook echoes and rear-flank downdrafts. Part I: A review. Mon. Wea. Rev., 130 , 852–876.
Pal, K., R. Mudi, and N. R. Pal, 2002: A new scheme for fuzzy rule based system identification and its application to self-tuning fuzzy controllers. IEEE Trans. Syst. Man. Cybernetics B, 32 , 470–482.
Pal, N. R., and K. K. Chintalapudi, 1997: A connectionist system for feature selection. Neural Parallel Sci. Comput., 5 , 359–382.
Pal, N. R., K. Pal, J. C. Bezdek, and T. A. Runkler, 1997: Some issues in system identification using clustering. Int. Joint Conf. Neural Networks: IJCNN 1997, Piscataway, NJ, IEEE, 2524–2529.
Smalley, D., R. Donaldson, I. Harris, S. L. Tung, and P. Desrochers, 1995: Quantization of severe storm structures. Proc. 27th Conf. on Radar Meteorology, Vail, CO, Amer. Meteor. Soc., 617–619.
Smith, T., 1995: Visualization of WSR-88D data in 3-D using application visualization software. Preprints, 14th Conf. on Weather Analysis and Forecasting, Dallas, TX, Amer. Meteor. Soc., 442–446.