Peakflow Forecasts Header

UMATILLA--NEAR GIBBON
   State:  Oregon    County:  UMATILLA
   Latitude:  45 43' 10" North    Longitude:  118 19' 19" West
   Elevation:  1855 feet
   Supporting WFO:  Pendleton    
   Action Stage:  6'   Flood Stage:  7'   Moderate Flood Stage:  9'
   Major Flood Stage:  
11.5'

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.

UMATILLA--NEAR GIBBON   (GIBO3)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-07
Forecast Period: December 7 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 4.49 600 2021-12-27
90 % 4.77 762 2022-01-03
70 % 5.12 989 2022-02-04
50 % 5.44 1232 2022-02-21
30 % 5.93 1658 2022-03-19
10 % 8.07 4362 2022-03-29
05 % 8.81 5647 2022-03-30

Peakflow exceedence plot for GIBO3

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