OKANOGAN − AT OROVILLE (OKNW1)
   State:  Washington
   County:  Okanogan
   Latitude:  48 55' 59" North
   Longitude:  119 25' 0" West
   Elevation:  900 ft

   Supporting NWS Forecast Office: WFO Spokane
   Click for NWS Official River Forecasts for OKNW1
   
Daily Historical Statistics for August 18, 2026
Mean Stage: 6.83 ft  Mean Flow: 621 cfs
Max Stage: 9.20 ft  Max Flow: 2540 cfs (1997)
Min Stage:  5.85 ft   Min Flow: 89 cfs (1992)

Statistics based on water years: 1943-2008
* 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 OKNW1

Data Used In Plot   "label   United States Geological Survey   


Hydrograph plot for OKNW1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for OKNW1

Data Used In Plot   "label   USGS Observations