Peakflow Forecasts Header

WYNOOCHEE--WYNOOCHEE DAM
   State:  Washington    County:  GRAYS HARBOR
   Latitude:  47 23' 7" North    Longitude:  123 36' 19" West
   Elevation:  810 feet
   Supporting WFO:  Seattle    
   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.

WYNOOCHEE--WYNOOCHEE DAM   (WYDW1)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-13
Forecast Period: July 13 to November 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 324 2025-09-02
90 % 919 2025-09-21
70 % 2046 2025-10-11
50 % 3007 2025-10-18
30 % 3722 2025-10-23
10 % 6056 2025-10-31
05 % 7425 2025-10-31

Peakflow exceedence plot for WYDW1

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