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High Pressure Centers
also known as anticyclones

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 often represent the centers of anticyclones.

A high pressure center is represented on a weather map by a blue H. Winds flow clockwise around the 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.

[Image: high and low pressure center animation (53K)]
** Press "Reload" to restart the animation **

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

Terms for using data resources. CD-ROM available.
Credits and Acknowledgments for WW2010.
Department of Atmospheric Sciences (DAS) at
the University of Illinois at Urbana-Champaign.