Snoqualmie River rises to Phase II flood alert level

Hours of persistent rain have brought the Snoqualmie River to a phase II flood alert.

As of 9:45 a.m. Wednesday morning, the sum of the Snoqualmie River’s three forks was 12,538 cubic feet per second (CFS), which exceeds the 12,000 CFS threshold for a Phase II flood alert.  At this level, some minor flooding in lowland areas could be expected along the river, and a handful of roads could be closed by rising water.

Staff at King County Flood Warning Center are now monitoring minor flooding conditions.

If flood levels rise high enough, the city of Snoqualmie may open its emergency operations center and send out reverse-911 notifications to low-lying neighborhoods.

The Flood Warning Center opened at 8:30 a.m. on Wednesday to monitor rising flows on the Tolt River, which is currently flowing at 3,710 CFS —also a Phase II flood alert level. King County staff 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


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