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:  19.5'   Flood Stage:  20.5'

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.

STEHEKIN--AT STEHEKIN   (STHW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-10
 Forecast Period: June 10 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 21.34 3353 2026-06-17
90 % 21.34 3353 2026-06-17
70 % 21.34 3353 2026-06-17
50 % 21.34 3353 2026-06-17
30 % 21.34 3353 2026-06-17
10 % 21.37 3410 2026-06-20
05 % 21.75 4137 2026-06-29

Peakflow exceedence plot for STHW1

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