Which statement is accurate regarding turbulence associated with thunderstorms?

The statement regarding turbulence associated with thunderstorms that is accurate highlights the presence of shear turbulence beyond the immediate vicinity of severe storms. When thunderstorms, particularly severe ones, occur, they can generate significant wind shear that affects the surrounding air. Wind shear refers to the variation in wind speed and direction with altitude, and it can lead to turbulence.

Specifically, it is understood that shear turbulence can be encountered outside of the thunderstorm cloud itself, and it can extend laterally quite a distance from the storm. The claim that shear turbulence can be experienced up to 20 miles from a severe storm is supported by observations and meteorological data, as storms can produce strong downdrafts and outflows that affect the surrounding air well beyond their immediate area.

In contrast, the other options suggest either incorrect distances at which turbulence can be found or imply that turbulence is limited to certain areas or conditions that do not fully capture the reality of wind shear effects associated with thunderstorms. By recognizing the appropriate distance where turbulence may occur, pilots and meteorologists can take appropriate precautions when flying in or near thunderstorm-affected areas.