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The counterclockwise winds associated with northern hemisphere midlatitude cyclones play a significant role in the movement air masses, transporting warm moist air northward ahead of a low while dragging colder, drier air southward behind it.
[Image: low pressure animation (53K)]
Rising air in the vicinity of a low pressure center favors the development of clouds and precipitation, which is why cloudy weather (and likely precipitation) are commonly associated with an area of low pressure.
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![[Image: low pressure animation (53K)]](/guides/mtr/cyc/gifs/def2.gif){kind=link}