GRANDE RONDE − TROY (TRYO3)
   State:  Oregon
   County:  Wallowa
   Latitude:  45 56' 45" North
   Longitude:  117 27' 0" West
   Elevation:  1586 ft

   Supporting NWS Forecast Office: WFO Pendleton

   
Click for NWS Official River Forecasts for TRYO3
   


   Action Stage:  
8 ft
   Flood Stage:  
10 ft
   Moderate Flood Stage:  
11 ft
   Major Flood Stage:  
12 ft
Daily Historical Statistics for May 31, 2026
Mean Stage: 7.56 ft  Mean Flow: 7140 cfs
Max Stage: 9.40 ft  Max Flow: 15500 cfs (2008)
Min Stage:  5.27 ft   Min Flow: 2000 cfs (1992)

Statistics based on water years: 1945-2025
* statistics estimated based on current rating

Record Stage: 
13.76 ft
Date of Record: 
February 9, 1996

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

Hydrograph plot for TRYO3

Data Used In Plot   "label   USGS Observations