OKANOGAN − NEAR TONASKET (TONW1)
   State:  Washington
   County:  Okanogan
   Latitude:  48 37' 57" North
   Longitude:  119 27' 28" West
   Elevation:  861 ft

   Supporting NWS Forecast Office: WFO Spokane

   
Click for NWS Official River Forecasts for TONW1
   


   Action Stage:  
14 ft
   Flood Stage:  
15 ft
   Moderate Flood Stage:  
17 ft
   Major Flood Stage:  
18 ft
Daily Historical Statistics for March 18, 2026
Mean Stage: 5.44 ft  Mean Flow: 1480 cfs
Max Stage: 8.29 ft  Max Flow: 4830 cfs (2007)
Min Stage:  3.78 ft   Min Flow: 410 cfs (1930)

Statistics based on water years: 1930-2024
* statistics estimated based on current rating

Record Stage: 
22.54 ft
Record Flow: 
44700 cfs
Date of Record: 
June 2, 1972

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

Hydrograph plot for TONW1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for TONW1

Data Used In Plot   "label   USGS Observations