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Wind

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Wind doesn't only travel side to side. In high pressure systems when temperature gradients are stable, wind travel downward. This action is called katabatic winds. Katabatic winds brings water vapors down and provide clear skies. As such, high pressure systems are usually associated with clear weather. On the other hand, low pressure systems do the opposite. It lifts up air. This process is called anabatic winds. Anabatic winds bring water vapors into the sky. As the water vapor rises in elevation, it cools and condenses in cold. If there is sufficient moisture, clouds and even precipitation can form. Therefore, low-pressure systems are associated with bad weather. Anabatic winds also occur when the sun heats up the air around the ground. Since warm air rises, it begins to generate anabatic winds. Figure 1. shows katabatic and anabatic winds.

Figure 1.

Retrieved from: https://www.eoas.ubc.ca/courses/atsc113/snow/met_concepts/06-met_concepts/06b-diurnal-slope-flows/Links to an external site.

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