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 May 15, 2026
Mean Stage: 7.52 ft  Mean Flow: 1130 cfs
Max Stage: 9.65 ft  Max Flow: 2950 cfs (1983)
Min Stage:  5.54 ft   Min Flow: -359 cfs (1949)

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   ---


Hydrograph plot for OKNW1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for OKNW1

Data Used In Plot   "label   USGS Observations