At what altitude do Gradient Winds typically occur, and how do they move?

Gradient winds typically occur at higher altitudes, generally above 2000 feet above ground level (AGL). These winds are characterized by their movement parallel to isobars, which are lines on a weather map that represent areas of equal atmospheric pressure. The flow of gradient winds is influenced by the balance between the pressure gradient force and the Coriolis force, which is a result of the Earth's rotation.

This parallel movement allows gradient winds to flow smoothly around high and low-pressure systems, maintaining a consistent pattern as they move within the atmospheric layers. It’s essential to understand that at lower altitudes, winds are more influenced by surface friction, which can lead to divergence from this parallel movement.

The other options suggest incorrect altitudes or wind behaviors that do not accurately describe gradient winds. For example, moving perpendicular to isobars or at lower altitudes fails to align with the fundamental principles of how these winds behave in relation to pressure systems.