Peakflow Forecasts Header

JOHN DAY--NEAR JOHN DAY
   State:  Oregon    County:  GRANT
   Latitude:  44 25' 7" North    Longitude:  118 54' 21" West
   Elevation:  3131 feet
   Supporting WFO:  Pendleton    
   Action Stage:  7.5'   Flood Stage:  8'   Moderate Flood Stage:  9'
   Major Flood Stage:  
10.5'

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.

JOHN DAY--NEAR JOHN DAY   (JHNO3)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-11
Forecast Period: July 11 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.66 74 2025-08-26
90 % 3.68 79 2025-10-02
70 % 3.72 88 2025-10-18
50 % 3.77 98 2025-10-23
30 % 3.80 107 2025-10-27
10 % 4.14 204 2025-10-31
05 % 4.31 274 2025-11-01

Peakflow exceedence plot for JHNO3

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