The King County Flood Warning Center opened at 1:30 a.m. on Friday, May 5, after heavy rainfall brought the Snoqualmie River up to a Phase 2 flood alert level.
At 1:30 a.m., the sum of the Snoqualmie River’s three forks recorded a flow of 12,696 cubic feet per second (CFS), slightly higher than the Phase 2 flood alert threshold of 12,000 CFS. Typically, only minor flooding in low-lying areas along the Snoqualmie River would be expected at these flows, with the potential for water over just a few roads.
A Phase 2 flood alert level is the level of the County's four-phase warning system at which the Flood Warning Center activates to monitor conditions.
Flood Warning Center employees will monitor stream gages and weather reports, and will provide updated information on river conditions as necessary. Real-time river level information is available online at kingcounty.gov/flood.
During river flooding events, King County serves as a clearinghouse for information on flood conditions, operating a recorded message center with continuous updates of river gage readings and flood phases and other related information. Reach the Flood Warning Center at 206-296-8200 or 1-800-945-9263. Interpreter assistance in multiple languages is available.
King County offers everyone free access to KC Flood Alerts, an automated system that allows subscribers to receive customized alerts of potential flooding for any or all of King County’s six major river systems.
Immediate notifications about pending high water are sent to email, smart phone text or voicemail, providing subscribers with the maximum amount of warning about potential high water.
Find the KC Flood Alerts link at kingcounty.gov/flood. This website is a valuable preparedness resource, with all of the latest information about river levels and road conditions, plus weather reports and other critical links.
Questions or assistance with flooding on smaller streams or urban drainage problems can be called in to 206-296-1900 during business hours, or 206-296-8100 after hours or on weekends.
Problems on County maintained roads can be reported by calling 206-296-8100 or 1-800-KC-ROADS.
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The King County Flood Control District is a special purpose government created to provide funding and policy oversight for flood protection projects and programs in King County. The Flood Control District’s Board is composed of the members of the King County Council. The Water and Land Resources Division of the King County Department of Natural Resources and Parks develops and implements the approved flood protection projects and programs. Information is available at kingcountyfloodcontrol.org/.