Blechman, J. B., 1975: The Wisconsin tornado event of April 21, 1974: Observations and theory of secondary vortices. Preprints, Ninth Conf. on Severe Local Storms, Norman, OK, Amer. Meteor. Soc., 344–349.
Brooks, H. E., 2004: On the relationship of tornado path length and width to intensity. Wea. Forecasting, 19 , 310–319.
Brooks, H. E., , Doswell C. A. III, , and Kay M. , 2003: Climatological estimates of local daily tornado probability for the United States. Wea. Forecasting, 18 , 626–640.
Bruening, S. L., , Kay M. P. , , and Brooks H. E. , 2002: A new perspective on the climatology of tornadoes in the United States. Preprints, 16th Conf. on Probability and Statistics, Orlando, FL, Amer. Meteor. Soc., J96–J103.
Doswell C. A. III, , , Johns R. H. , , and Weiss S. J. , 1993: Tornado forecasting: A review. The Tornado: Its Structure, Dynamics, Hazards, and Prediction, Geophys. Monogr., No. 79, Amer. Geophys. Union, 557–571.
Doswell C. A. III, , , Brooks H. E. , , and Kay M. , 2005: Climatological estimates of daily nontornadic severe thunderstorm probability for the United States. Wea. Forecasting, 20 , 577–595.
Edwards, R., , Thompson R. L. , , Crosbie K. C. , , Hart J. A. , , and Doswell C. A. III, 2004: A proposal for modernized definitions of tornado and severe thunderstorm outbreaks. Preprints, 22d Conf. on Severe Local Storms, Hyannis, MA, Amer. Meteor. Soc., CD-ROM, 7B.2.
Forbes, G. S., , and Wakimoto R. M. , 1983: A concentrated outbreak of tornadoes, downbursts and microbursts, and implications regarding vortex classification. Mon. Wea. Rev., 111 , 220–236.
McCaul E. W. Jr., , 1991: Buoyancy and shear characteristics of hurricane–tornado environments. Mon. Wea. Rev., 119 , 1954–1978.
Pautz, M. E., 1969: Severe local storm occurrences, 1955–1967. ESSA Tech. Memo. WBTM FCST12, Washington, DC, 77 pp.
Schaefer, J. T., , and Edwards R. , 1999: The SPC tornado/severe thunderstorm database. Preprints, 11th Conf. on Applied Climatology, Dallas, TX, Amer. Meteor. Soc., 603–606.
Speheger, D. A., , Doswell C. A. III, , and Stumpf G. J. , 2002: The tornadoes of 3 May 1999: Event verification in central Oklahoma and related issues. Wea. Forecasting, 17 , 362–381.
Thompson, R. L., , and Vescio M. D. , 1998: The destruction potential index—A method for comparing tornado days. Preprints, 19th Conf. on Severe Local Storms, Minneapolis, MN, Amer. Meteor. Soc., 280–282.
Van Tassel, E. L., 1955: The North Platte Valley tornado outbreak of June 27, 1955. Mon. Wea. Rev., 83 , 255–264.
Verbout, S. M., , Leslie L. M. , , Brooks H. E. , , and Bruening S. L. , 2004: Leveling the field for tornado reports through time: Inflation-adjustment of annual tornado reports and objective identification of extreme tornado reports. Preprints, 22d Conf. on Severe Local Storms, Hyannis, MA, Amer. Meteor. Soc., CD-ROM, 7B.3.
Wolter, K., , and Timlin M. S. , 1998: Measuring the strength of ENSO—How does 1997/98 rank? Weather, 53 , 315–324.
Zipser, E. J., , and Golden J. H. , 1979: A summertime tornado outbreak in Colorado: Mesoscale environment and structural features. Mon. Wea. Rev., 107 , 1328–1342.