Peakflow Forecasts Header

WHITE SALMON--NEAR UNDERWOOD
   State:  Washington    County:  KLICKITAT
   Latitude:  45 45' 0" North    Longitude:  121 32' 0" West
   Elevation:  113 feet
   Supporting WFO:  Pendleton    

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.

WHITE SALMON--NEAR UNDERWOOD   (UNDW1)
Forecasts for Water Year
2026
Ensemble Date: 2026-06-06
Forecast Period: June 6 to October 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.90 845 2026-06-17
90 % 3.90 847 2026-06-17
70 % 3.96 896 2026-07-03
50 % 4.00 928 2026-07-15
30 % 4.06 978 2026-07-23
10 % 4.15 1064 2026-09-04
05 % 4.26 1164 2026-09-21

Peakflow exceedence plot for UNDW1

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