UPDATE – 830 a.m.: With heavy rainfall easing and river flows receding in the upper Snoqualmie River basin, the King County Flood Warning Center closed at 8:30 a.m. Thursday, March 12, after a brief activation to monitor minor flood conditions along the river.

Flood Warning Center staff will continue to track river levels and weather data in case these improving conditions change unexpectedly.

King County’s Flood Warning Center is staffed 24/7 during flood events, serving as an information clearinghouse for the public and other agencies responsible for ensuring public safety.

King County offers everyone free access to KC Flood Alerts, an automated system with customized flood alerts on King County major river systems. When you sign up for KC Flood Alerts, you’ll get immediate notifications about pending high water via email, text or voicemail, giving subscribers with the maximum amount of warning about potential flooding.

Track real-time conditions for six rivers and Issaquah Creek with the Flood Warning App, which was developed by the King County Flood Control District and King County as service provider.

Install the app on your phone or desktop to help inform your important safety decisions before, during, and after flood events. Information is available in multiple languages with Google Translate. Launch or install the app at kingcounty.gov/flood.

King County Flood Warning Center opens to monitor minor flooding along Snoqualmie River as heavy rain soaks region

Thursday, March 12, 2026 – 5:30 a.m.
Heavy rainfall across the Cascade foothills on Thursday, March 12, brought the Snoqualmie River up to a minor flood level, and the King County Flood Warning Center opened to monitor possible impacts to roads in low-lying areas.

As of 5:30 a.m. on March 12, the sum of the Snoqualmie River’s three forks was recorded at 14,670 cubic feet per second, surpassing the Phase 2 flood alert threshold of 12,000 CFS. At these flows, some minor flooding could occur – with potential floodwaters along Southeast Reinig Road, Meadowbrook Road, Mill Pond Road, Neal Road Southeast, and a handful of other roads.

Although additional rainfall is expected across much of western Washington for the next several days, widespread river flooding is not expected from this current storm.

For the latest flood information and safety resources, visit kingcounty.gov/flood or call 1-800-945-9263.

King County Flood Warning Center staff are monitoring stream gauges and weather reports to provide updated information on river conditions as necessary.

The Flood Warning Center is staffed 24/7 during flood events. The center serves as an information clearinghouse for the public and other agencies responsible for ensuring public safety during a flood event.