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Relationship Between the Number of Days with Thunderstorms and the Duration of Thunderstorms According to Visual and Instrumental Observations

For study the relationship between number of days with a thunderstorm recorded by weather stations and duration of thunderstorms in hours for these days, instrumental observations of the thunder direction-finding network of High-Mountain Geophysical Institute were used. We used data on thunderstorms in the North Caucasus for a long-term observation period in 2008-2019. Based on these data, they are grouped for various territories for analysis: the number of days with thunderstorms per month, per year, and the duration of thunderstorms per month and per year. A correlation analysis was performed between the number of days with thunderstorms and the duration of thunder-storms in hours according to LS 800 data. Thus, the dependence of the number of days with thunderstorms on the duration of thunderstorms is clearly traced - with an increase in the number of days with thunderstorms per year, the observation point increases in direct proportion to the duration of thunderstorms per year. With an increase in the number of days with thunderstorms on a given territory by one day, for the month in question, the duration of thunderstorms increases by 3.89 hours.