S YAMHILL − NEAR WILLAMINA (WLAO3)
   State:  Oregon
   County:  Polk
   Latitude:  45 2' 49" North
   Longitude:  123 30' 10" West
   Elevation:  236 ft

   Supporting NWS Forecast Office: WFO Portland

   
Click for NWS Official River Forecasts for WLAO3
   

Daily Historical Statistics for August 18, 2026
Mean Stage: 1.65 ft  Mean Flow: 21 cfs
Max Stage: 1.90 ft  Max Flow: 59 cfs (1948)
Min Stage:  1.30 ft   Min Flow: 5 cfs (1967)

Statistics based on water years: 1935-1993
* 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 WLAO3

Data Used In Plot   "label   OWRD Observations