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Wind Patterns

Wind Patterns

  • In the Northern Hemisphere, the fl ow of air from areas of high to low pressure is deflected to the right and produces a clockwise circulation around an area of high pressure.
  • This is known as anticyclonic circulation.
  • The opposite is true of low-pressure areas; the air fl ows toward a low and is deflected to create a counterclockwise or cyclonic circulation.
  • High pressure systems are generally areas of dry, stable, descending air.
  •  Good weather is typically associated with high pressure systems for this reason.
  • Conversely, air fl ows into a low pressure area to replace rising air.
  • This air tends to be unstable, and usually brings increasing cloudiness and precipitation.
  • Thus, bad weather is commonly associated with areas of low pressure.

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