Peakflow Forecasts Header

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: 2025-05-12
Forecast Period: May 12 to September 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 121 2025-05-13
90 % 121 2025-05-13
70 % 121 2025-05-13
50 % 129 2025-05-28
30 % 162 2025-06-07
10 % 324 2025-06-25
05 % 524 2025-07-15

Peakflow exceedence plot for COTO3

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