Peakflow Forecasts Header

KACHESS--KACHESS DAM
   State:  Washington    County:  KITTITAS
   Latitude:  47 16' 0" North    Longitude:  121 12' 0" West
   Elevation:  2269 feet
   Supporting WFO:  Pendleton    
   Inflow Data  

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.

KACHESS--KACHESS DAM   (KADW1)
Forecasts for Water Year
2026
Ensemble Date: 2026-08-16
Forecast Period: August 16 to December 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 189 2026-09-30
90 % 239 2026-10-18
70 % 605 2026-10-31
50 % 1054 2026-11-06
30 % 1715 2026-11-16
10 % 5649 2026-11-24
05 % 8267 2026-11-25

Peakflow exceedence plot for KADW1

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