Green River (WA) near Auburn, WA
River level and flood forecast · King County
Normalas of Mon 8:45 PM
Forecast to hold near 0.5 ft through Thu, Oct 22, 5 AM.
Flow: 461 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 8:26 AM. Forecasts change as rain falls and as upstream water arrives.
What floods at each level
From the National Weather Service, highest first.
- 14000 ftthe Green River will experience major flooding inundating much of the flood plain from the middle Green River valley downstream to Tukwilla. Some homes...businesses and neighborhoods will see significant flooding with some evacuations likely needed. Levees may be overtopped and erosion may damage levees. A flow of 12000 cfs or above on the Green River corresponds roughly to a phase 4 flood in the King County flood system.
- 12000 ftthe Green River will inundate low areas from the middle Green River valley downstream to Auburn...with water over several roads including SE Green Valley Rd and West Valley Rd. Levees from Auburn down through Tukwilla may exhibit seeapage and may weaken due to saturation. A flow of 12000 cfs on the Green River corresponds to a phase 4 flood in the King County flood system.
- 10000 ftthe Green River will flood low areas of the middle Green River valley with water over SE Green Valley Rd. Some flooding is possible at a few low spots along the banks of the Green River in Auburn, including near Issac Evans Park in lower Mill Creek basin between Auburn and Kent due to backwater. A flow of 9000 cfs feet on the Green River corresponds to a phase 3 flood in the King County flood system.
- 9000 ftthe Green River will flood low areas of the middle Green River valley with water over SE Green Valley Rd. Some backwater inundation is possible in lower Mill Creek basin between Auburn and Kent. A flow of 9000 cfs feet on the Green River corresponds to a phase 3 flood in the King County flood system.
- 7000 ftthe Green River will spill over its banks into low areas in Green Valley and in lower Mill Creek basin between Auburn and Kent. A flow of 7000 cfs on the Green River corresponds to a phase 2 flood in the King County flood system.
Highest crests on record
- 69.75 ft — November 23, 1959
- 68.67 ft — December 13, 2025
- 68.16 ft — December 11, 1946
- 67.73 ft — December 12, 1955
- 67.17 ft — December 10, 1953
Recent crests: 67 ft (December 18, 2025) · 68.67 ft (December 13, 2025) · 64.25 ft (February 7, 2020) · 63.3 ft (February 6, 2020) · 61.9 ft (February 2, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (AUBW1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.