A large body of air having uniform temperature and moisture. A high-pressure weather system.
Winds rotate clockwise around an anticyclone.
It is often associated with fair, sunny weather, but in the winter can produce very cold, even frigid weather. A high pressure system, which originates in northern Canada, or the Arctic. When it moves south toward the U.S., it produces very cold, sometimes frigid weather. A high pressure system centered in the western Atlantic Ocean, near Bermuda. Over much of the eastern United States, this usually causes a southerly wind flow of warm and humid air, and in some cases, heat waves during the summer.