Peakflow Forecasts Header

IMNAHA--AT IMNAHA
   State:  Oregon    County:  WALLOWA
   Latitude:  45 33' 43" North    Longitude:  116 49' 59" West
   Elevation:  1968 feet
   Supporting WFO:  Pendleton    
   Action Stage:  5'   Flood Stage:  5.5'   Moderate Flood Stage:  7'
   Major Flood Stage:  
9'

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.

IMNAHA--AT IMNAHA   (IMNO3)
Forecasts for Water Year
2025
Ensemble Date: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.40 1892 2025-05-14
90 % 4.40 1892 2025-05-14
70 % 4.40 1892 2025-05-14
50 % 4.40 1892 2025-05-14
30 % 4.62 2150 2025-05-28
10 % 4.90 2516 2025-06-06
05 % 5.13 2846 2025-06-11

Peakflow exceedence plot for IMNO3

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