Refer to figure.
When air converges at the surface and diverges aloft, it leads to the formation of low pressure. This upward motion causes the air to rise, cool, and condense, resulting in cloud development and precipitation. The vertical ascent can be intense, leading to steeper pressure gradients, tighter isobars, and stronger winds.

In contrast, when air diverges at the surface and converges aloft, high pressure systems form. This causes air to sink, warming and drying as it descends, which helps to dissipate clouds and maintain clearer skies.

Learning Objective 050.02.02.03.02: Explain the relationship between convergence and divergence on the following: pressure systems at the surface and aloft; wind speed; vertical motion and cloud formation (relationship between upper-air conditions and surface pressure systems).