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COAST FORK WILLAMETTE--COTTAGE GROVE DAM
   State:  Oregon    County:  LANE
   Latitude:  43 43' 12" North    Longitude:  123 3' 0" West
   Elevation:  800 feet
   Supporting WFO:  Portland    
   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.

COAST FORK WILLAMETTE--COTTAGE GROVE DAM   (COTO3)
Forecasts for Water Year
2025
Ensemble Date: 2025-07-11
Forecast Period: July 11 to November 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 84 2025-08-02
90 % 105 2025-09-11
70 % 129 2025-10-07
50 % 165 2025-10-22
30 % 240 2025-10-27
10 % 554 2025-10-31
05 % 620 2025-11-01

Peakflow exceedence plot for COTO3

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