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King County Flood Warning Center opens to monitor minor flooding on Snoqualmie River
The King County Flood Warning Center opened at 12:30 a.m. on Tuesday, Nov. 19, after persistent heavy rainfall for much of the day brought the Snoqualmie River up to a Phase II flood alert level. Only minor flooding is expected.
As of 12:30 a.m., the sum of the Snoqualmie River’s three forks was 12,300 cubic feet per second, higher than the Phase II flood alert threshold of 12,000 CFS. Typically, only minor flooding in low-lying areas would be expected along the Snoqualmie River at this flow, with the potential for water over just a few roads.
A Phase II flood alert level is the level of the County's four-phase warning system at which the Flood Warning Center activates to monitor conditions. The Flood Warning Center will remain open as long as flood conditions persist.
Flood Warning Center staff 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.