GREEN − BELOW HOWARD HANSON DAM (HAHW1)
   State:  Washington
   County:  King
   Latitude:  47 17' 1" North
   Longitude:  121 47' 48" West
   Elevation:  990 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for HAHW1
Daily Historical Statistics for October 07, 2025
Mean Stage: 4.92 ft  Mean Flow: 462 cfs
Max Stage: 7.27 ft  Max Flow: 1680 cfs (1965)
Min Stage:  3.86 ft   Min Flow: 175 cfs (1988)

Statistics based on water years: 1961-2025
* statistics estimated based on current rating

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for HAHW1


For Data Used In Plot   "label