Peakflow Forecasts Header

UMATILLA--AT PENDLETON
   State:  Oregon    County:  UMATILLA
   Latitude:  45 40' 15" North    Longitude:  118 47' 30" West
   Elevation:  1050 feet
   Supporting WFO:  Pendleton    
   Action Stage:  11'   Flood Stage:  12.3'   Moderate Flood Stage:  13.5'
   Major Flood Stage:  17'

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.

UMATILLA--AT PENDLETON   (PDTO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-10
 Forecast Period: June 10 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 4.59 89 2026-06-10
90 % 4.59 89 2026-06-10
70 % 4.59 89 2026-06-10
50 % 4.59 89 2026-06-10
30 % 4.59 89 2026-06-10
10 % 4.59 89 2026-06-10
05 % 4.59 89 2026-06-10

Peakflow exceedence plot for PDTO3

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