A high pressure center is where the pressure has been measured to be the highest relative to its surroundings. That means, moving any direction away from the High will result in a decrease in pressure. High pressure centers also represent the centers of anticyclones.

A high pressure center is represented on a weather map by a blue H and winds flow clockwise around a high in the northern hemisphere. The opposite is true in the southern hemisphere, where winds flow in a counterclockwise around an area of high pressure.

Sinking air in the vicinity of a high pressure center tends to suppress the upward motions required for clouds and precipitation to develop, which is why fair weather is commonly associated with an area of high pressure.