Snow and Avalanche Glossary

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Low Pressure

Also: Cyclonic, Convergence

Meteorological (weather) terms.

An area of counter-clockwise turning winds, low barometric pressure, and stormy weather. (In the Northern Hemisphere.) The geostrophic (high altitude) winds are nearly circular on a large scale, but surface friction causes an inward component to the circular motion. This is called "convergence."

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