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: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.11 666 2025-05-13
90 % 5.11 666 2025-05-13
70 % 5.11 666 2025-05-13
50 % 5.11 666 2025-05-13
30 % 5.28 755 2025-05-29
10 % 5.87 1085 2025-06-07
05 % 6.09 1211 2025-06-09

Peakflow exceedence plot for JHNO3

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