1. A method of predicting current tornado activity comprising (a) receiving model data for a first time period and a second time period indicative of tornadic activity, wherein said first time period is prior to the current time and said second time period is subsequent to the current time; (b) generating a first time period model data tornado potential index and a second time period model data tornado potential index using said model data; (c) generating a current time model data tornado potential index from said first time period model data tornado potential index and said second time period model data tornado potential index; (d) receiving radar data indicative of tornadic activity; (e) generating a radar data tornado potential index using said radar data; (f) generating a composite tornado potential index using said current time model data tornado potential index and radar data tornado potential index.