The King County Flood Warning Center has issued a Phase 3 flood alert for the Snoqualmie River, where moderate flooding is expected. The Flood Warning Center has also issued a Phase 2 flood alert for the Tolt River, where minor flooding could occur.
The King County Flood Warning Center, which opened at 7:15 p.m. on Tuesday, Nov. 22 to monitor rising river levels from heavy rainfall, has issued a Phase 3 flood alert for the Snoqualmie River, where moderate and widespread flooding could be expected.
The Flood Warning Center has also issued a Phase 2 flood alert for the Tolt River, where minor lowland flooding could occur while high flows persist.
As of 12:15 a.m. on Wednesday, Nov. 22, the sum of the Snoqualmie River’s three forks were flowing at 20,360 cubic feet per second (CFS), slightly higher than the Phase 3 flood alert threshold. At these flows, moderate and widespread flooding can be expected throughout low-lying areas along the Snoqualmie River.
Flows on the Tolt River surpassed the Phase 2 flood alert threshold early on Wednesday, Nov. 22. As of 12:30 a.m., the Tolt River was flowing at 3,840 (CFS), slightly higher than the Phase 2 flood alert threshold of 3,500 CFS. Minor lowland flooding can be expected along the Tolt River upstream of Carnation.
Other King County rivers have been rising as a result of the steady rainfall that has been lashing much of the region for the past few days. Flood Warning Center employees will continue to 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 seven 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 206-477-4811 during business hours, or 206-477-8100 after hours or on weekends.
Problems on County maintained roads can be reported by calling 206-477-8100 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.