Where, and when, are thunderstorms the most common?

There is a permanent band of thunderstorms over the tropic region known as the Inter Tropical Convergence Zone (ITCZ). It moves north and south of the Equator according to whether it is summer or winter. read more

Thunderstorms are most likely in the spring and summer months and during the afternoon and evening hours, but they can occur year-round and at all hours. read more

These storms most frequently form within areas located at mid-latitude where warm moist air front collides and border cool air fronts. Compared to more active parts of the United States, thunderstorms are relatively rare in Alaska, New England, North Dakota, Montana, and other northern states where the air is generally cold. read more

This is the most common type of thunderstorm development. Mature thunderstorms are found near the center of the cluster, while dissipating thunderstorms exist on their downwind side. Multicell storms form as clusters of storms but may then evolve into one or more squall lines. read more