Climatological Estimates of Local Daily Tornado Probability for the United States Brooks, Harold E. ; Doswell, Charles A. ; Kay, Michael P. Abstract Publication: Weather and Forecasting Pub Date: August 2003 DOI: 10.1175/1520-0434(2003)018<0626:CEOLDT>2.0.CO;2 Bibcode: 2003WtFor..18..626B