Puget Sound Convergence Zone

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The Puget Sound Convergence Zone (PSCZ) is a meteorological phenomenon that occurs over Puget Sound in Washington. It is formed when the large-scale air flow splits around the Olympic Mountains and then converges over Puget Sound. This convergence can cause updrafts and convection, which leads to a narrow band of precipitation. This is evidenced by the 140-180+ in (356 cm-457+ cm) of precipitation over Glacier Peak to the east of Puget Sound.

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