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
2024
Ensemble Date: 2024-04-25
Forecast Period: April 25 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.80 510 2024-04-27
90 % 4.80 510 2024-04-27
70 % 5.04 637 2024-05-18
50 % 5.28 767 2024-05-22
30 % 5.68 984 2024-06-01
10 % 6.29 1341 2024-06-08
05 % 6.54 1499 2024-06-10

Peakflow exceedence plot for JHNO3

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