Waterspout Risk Index over the Russian Black Sea water area
The article presents waterspout forecasting issues. The authors analyze features of their formation as well as modern approaches of their forecasting. A description of a technique of constructing a new waterspout risk index which takes into account climatic features of waterspout formation over the Russian Black Sea water area is presented. Mathematical expression for calculation of a new index was obtained based on the results of applying of this technique to waterspout cases during 2014-2015. Results of calculation of forecasting hit rate of waterspout cases during considered period on a base of a new index and other approaches is presented.