Space distribution is considered of thunderstorm activity in Northern Caucasus during 1936-2006. Area distribution is presented of numbers of days with thunderstorm and of thunderstorm duration. Time variations are analyzed of mean numbers of the days with thunderstorms and of the thunderstorm mean duration, which probably represent a part of climate changes at the area under consideration. The largest variations of thunderstorm activity occur in the western part of the Northern Caucasus, where annual number of the days with thunderstorms reaches 70. Minimum changes in the thunderstorm characteristics occur in the eastern part of the area, with annual number of the days with thunderstorms equal to 25.

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