For a storm to gain strength, strong thunderstorms need to build around it.

Rather, as the storm system pulled out into the central plains, strong thunderstorms and tornadoes quickly began to form despite the late hours.

In the beginning, the storm was not strong, with few strong thunderstorms.

Tornadoes are not usually connected with the strong thunderstorms of the summer.

The area is susceptible to strong thunderstorms, especially in the summer months.

Additional strong thunderstorms developed ahead of the front across the southeast during the overnight and early morning hours.

The system stayed a tropical depression, because it continued to create strong thunderstorms.

The eruption was reported to have produced lightning and strong thunderstorms.

New York is hit by a very strong thunderstorm that causes a large storm surge.

The beginning and end of the rainy season is marked by strong thunderstorms.