Encyclopedia
Thunderstorm
Thunderstorm: An atmospheric phenomenon associated with the development of powerful cumulonimbus clouds, accompanied by multiple electrical discharges between clouds and the Earth's surface, acoustic phenomena, heavy precipitation, often including hail
Source: "SAFETY IN EMERGENCY SITUATIONS. NATURAL EMERGENCY SITUATIONS. TERMS AND DEFINITIONS. GOST 22.0.03-97/GOST R 22.0.03-95"
(approved by the Decree of the Russian State Standard from 25.05.1995 No. 267)