What is the angle between the pressure gradient and isobars?

The angle between the pressure gradient and isobars is indeed at right angles. This relationship is critical in meteorology because the pressure gradient force, which is caused by differences in air pressure, acts directly from high pressure to low pressure. Since isobars represent lines of equal pressure on a weather map, the pressure gradient force is always perpendicular to these lines.

Understanding this angle is essential for predicting wind direction because the wind tends to flow from high to low pressure while being deflected by the Coriolis effect, resulting in winds that flow parallel to isobars rather than directly down the pressure gradient. This fundamental concept helps meteorologists interpret weather patterns and predict changes in atmospheric conditions accurately. The other options do not accurately reflect this relationship, as the angle between the pressure gradient and isobars is a critical consideration in weather forecasting.