Any storm which contains lightning. Thunderstorms are the basis of just about all severe weather phenomenon. Most forecasts are based on the development of thunderstorms, since they are what produce tornadoes, downbursts, hail, most flash floods, and of course, they make up hurricanes. A thunderstorm is much more than just thunder & lightning. Violent activity is occurring within every thunderstorm.

गरज वर्षा,वातोत्पात,गरज वाला तूफान,वज्र-झंझावात,आँधी-तूफान