King County Flood Warning Center opens to monitor river flooding from strong rainfall

Dec. 24 – 11:30 p.m.

King County opened its Flood Warning Center late on Saturday, Dec. 24, as heavy rainfall brought sharp rises to rivers across the region and the Snoqualmie River reached a minor Phase 2 flood alert level at 11 p.m. Saturday.

As of 11:15 p.m. Saturday, the Snoqualmie River at Snoqualmie was flowing at 12,300 cubic feet per second (CFS). That’s slightly higher than the Phase 2 threshold of 12,000 CFS – the flow at which we could start to see some flood impacts to low-lying areas along the river, such as potential floodwater over fields and roadways.

Additional minor river flooding is possible over the next few days with additional significant rainfall headed our way. Find real-time river level information at

Our Flood Warning Center operates 24/7 during these flood events, with King County employees monitoring stream gauges and weather reports, and keeping in touch with their colleagues at the National Weather Service, the Northwest River Forecast Center, and with dam operators.

Contact the Flood Warning Center at 206-296-8200 or 1-800-945-9263 to get the latest information on flood conditions or ask questions about river flooding. You can also access our recorded message center using that phone number and get updates of river gauge readings, flood phases, and other related information.

Don’t forget – King County offers everyone free access to KC Flood Alerts that offers flood alerts on King County major river systems via email, text or voicemail on any or all of the major river systems in the county, plus Issaquah Creek.

We’ll share new information on this minor flood event as soon as it comes available.

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