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
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 6.33 1215 2021-12-27
90 % 6.83 1733 2022-01-05
70 % 7.49 2449 2022-02-06
50 % 8.19 3302 2022-02-24
30 % 8.95 4276 2022-03-18
10 % 11.73 8331 2022-03-28
05 % 12.23 9383 2022-03-30

Peakflow exceedence plot for PDTO3

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