WASHINGTON FLOW REPORT

Last Updated: April 19, 2026

Streamflow levels across Washington are currently 100.0% of normal, with the Columbia River Below Priest Rapids Dam reporting the highest discharge in the state with 118000cfs and gauge stage of 15.14 ft. Meanwhile, the Mill Creek At Five Mile Rd Br Nr Walla Walla is seeing a spike in streamflows today after experiencing a 217.0% increase since yesterday, and currently running at 634cfs.

Maximum gauge stage in the state was last observed at the Cowlitz River Near Kosmos, currently reporting a stage of ft. The Duwamish River At Golf Course At Tukwila in the Duwamish watershed is surging for this time of year at 6700cfs, about 284.56% of normal.