A high-pressure system is typically associated with clear skies, calm or light winds, and stable weather conditions. It is characterized by descending air, which pushes down on the Earth's surface and inhibits cloud formation. Say this simpler

A high-pressure system means clear skies, gentle winds, and stable weather. It happens when air pushes down from above, preventing clouds from forming.

A high-pressure system means clear skies and calm weather with little to no wind. It happens when air descends and keeps clouds from forming.

A high-pressure system means there is a lot of air pressure in a particular area. This usually leads to nice weather with clear skies, gentle winds, and stable weather conditions. The reason for this is that the air in a high-pressure system is sinking down towards the ground, which prevents clouds from forming. So, if you see a high-pressure system on a weather map, you can expect sunny and calm weather in that area.