Puget Sound Convergence Zone Puget Sound Convergence Zone The Puget Sound Convergence Zone (PSCZ) is a meteorological phenomenon that occurs over Puget Sound in the U.S. state of Washington. It is formed when the large-scale air flow splits around the Olympic Mountains and then converges over Puget Sound. This convergence zone generally occurs between north Seattle and Everett and can cause updrafts and convection, which leads to a narrow band of precipitation. A second, weaker convergence zone can occur between approximately Victoria, British Columbia, and Bellingham, Washington, over the San Juan Islands, as a result of southwesterly air blowing from the Strait of Juan
Puget Sound region Ferries, connects the larger islands to the Washington mainland, as well as both sides of the sound, allowing cars and people to move about the greater Puget Sound region. North Pacific Oak Woodland is one of the principal plant associations of the Puget Trough, where many of the soils are well drained mesic. Counties of the Puget Sound region: In addition, the San Juan Islands (all of San Juan County plus a few islands belonging to Whatcom County) are often considered part of the greater Puget Sound area. Prominent islands: Urban centers: Satellite cities: Other principal cities: Military bases: Puget