Peakflow Forecasts Header

NF JOHN DAY--AT MONUMENT
   State:  Oregon    County:  GRANT
   Latitude:  44 48' 54" North    Longitude:  119 25' 50" West
   Elevation:  1960 feet
   Supporting WFO:  Pendleton    
   Action Stage:  12'   Flood Stage:  14'

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.

NF JOHN DAY--AT MONUMENT   (MONO3)
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 % 2.94 253 2025-07-05
90 % 2.94 253 2025-07-05
70 % 2.94 253 2025-07-05
50 % 2.94 253 2025-07-05
30 % 2.94 253 2025-07-05
10 % 2.98 268 2025-09-16
05 % 3.15 337 2025-10-29

Peakflow exceedence plot for MONO3

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