North american high

North American high

(Or North American anticyclone.) The relatively weak general area of high pressure that, as shown on mean charts of sea level pressure, covers most of North America during winter.

This pressure system is not nearly as well-defined as the analogous Siberian high.

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An atmospheric anticyclonic circulation, a closed circulation. The wind in an anticyclone is in the clockwise direction in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.