Gust front boundary characteristics include which of the following?

Gust front boundary characteristics include which of the following?

• A. The boundary where cold air spreads out ahead of a thunderstorm.
• B. The leading edge of a thunderstorm where rain begins to fall.
• C. The core of the storm where hail forms.
• D. A calm pocket of air near the surface.

Answer: (A)

Gust fronts are the surface boundary created when air from a thunderstorm downdraft spreads outward as it reaches the ground. The defining feature is the cold, dense air rushing out ahead of the storm, producing gusty winds and often a noticeable wind shift as you cross the boundary. This is not the edge where rain first begins to fall—that describes the precipitation boundary—and it’s not the storm’s core where hail forms, nor a calm pocket of air. The gust front specifically marks where the outflow cool air meets the surrounding environment.

Gust fronts are the surface boundary created when air from a thunderstorm downdraft spreads outward as it reaches the ground. The defining feature is the cold, dense air rushing out ahead of the storm, producing gusty winds and often a noticeable wind shift as you cross the boundary. This is not the edge where rain first begins to fall—that describes the precipitation boundary—and it’s not the storm’s core where hail forms, nor a calm pocket of air. The gust front specifically marks where the outflow cool air meets the surrounding environment.