Peakflow Forecasts Header

WENATCHEE--AT PESHASTIN
   State:  Washington    County:  CHELAN
   Latitude:  47 35' 3" North    Longitude:  120 37' 12" West
   Elevation:  1028 feet
   Supporting WFO:  Spokane    
   Action Stage:  12'   Flood Stage:  13'   Moderate Flood Stage:  14'
   Major Flood Stage:  
15'

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.

WENATCHEE--AT PESHASTIN   (PESW1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-15
Forecast Period: July 15 to November 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 3.01 1406 2025-07-15
90 % 3.01 1406 2025-07-15
70 % 3.01 1406 2025-07-15
50 % 3.46 1875 2025-10-13
30 % 4.71 3574 2025-10-26
10 % 6.45 6858 2025-11-01
05 % 8.01 10296 2025-11-01

Peakflow exceedence plot for PESW1

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