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 2026
Ensemble Date: 2026-06-14
 Forecast Period: June 14 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.92 198 2026-06-14
90 % 2.92 198 2026-06-14
70 % 2.92 198 2026-06-14
50 % 2.92 198 2026-06-14
30 % 2.92 198 2026-06-14
10 % 2.92 198 2026-06-14
05 % 2.93 202 2026-06-24

Peakflow exceedence plot for MONO3

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