Peakflow Forecasts Header

STEHEKIN--AT STEHEKIN
   State:  Washington    County:  CHELAN
   Latitude:  48 19' 47" North    Longitude:  120 41' 26" West
   Elevation:  1099 feet
   Supporting WFO:  Spokane    
   Action Stage:  22'   Flood Stage:  24'

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.

STEHEKIN--AT STEHEKIN   (STHW1)
Forecasts for Water Year
2026
Ensemble Date: 2026-02-06
Forecast Period: February 6 to June 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 21.41 3506 2026-05-05
90 % 21.55 3759 2026-05-08
70 % 22.03 4689 2026-05-16
50 % 22.47 5546 2026-05-22
30 % 22.94 6503 2026-05-30
10 % 24.25 9265 2026-06-01
05 % 24.63 10093 2026-06-01

Peakflow exceedence plot for STHW1

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