What type of weather feature typically occurs with counterclockwise rotation in the northern hemisphere?

• A. Cyclone
• B. Anti-cyclone
• C. Stationary front
• D. Low-pressure area

Answer: (A)

In the northern hemisphere, a weather feature characterized by counterclockwise rotation is known as a cyclone. Cyclones are areas of low atmospheric pressure where the air converges and rises, creating clouds and precipitation. The Coriolis force, which is the result of the Earth's rotation, causes this counterclockwise movement. As warm, moist air rises in a cyclone, it cools and condenses, often leading to stormy weather conditions.

On the other hand, an anti-cyclone, which rotates clockwise in the northern hemisphere, is associated with high pressure and generally offers clear and stable weather. A stationary front represents the boundary between two air masses that are not moving, and it does not involve rotation. A low-pressure area is a broader category that includes cyclones, but it does not specify the rotation direction. Therefore, "cyclone" correctly describes the specific type of weather feature with counterclockwise rotation in the northern hemisphere.