Peakflow Forecasts Header

GRANDE RONDE--TROY
   State:  Oregon    County:  WALLOWA
   Latitude:  45 56' 45" North    Longitude:  117 27' 0" West
   Elevation:  1586 feet
   Supporting WFO:  Pendleton    
   Action Stage:  8'   Flood Stage:  10'   Moderate Flood Stage:  11'
   Major Flood Stage:  
12'

Forecasts are calculated from a forecast time series that approximates flow at a 6 hour time step interval. Observed instantaneous peaks can be higher than model forecast peaks.

GRANDE RONDE--TROY   (TRYO3)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-04
Forecast Period: July 4 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.99 1557 2025-07-04
90 % 3.99 1557 2025-07-04
70 % 3.99 1557 2025-07-04
50 % 3.99 1557 2025-07-04
30 % 3.99 1557 2025-07-04
10 % 4.09 1692 2025-10-12
05 % 4.66 2526 2025-10-31

Peakflow exceedence plot for TRYO3

 Click to download runoff traces used in forecast.  Click for comma delimited data used in plot.csv icon