Peakflow Forecasts Header

COW CREEK--GALESVILLE RESERVOIR
   State:  Oregon    County:  DOUGLAS
   Latitude:  42 50' 56" North    Longitude:  123 10' 40" West
   Elevation:  1881 feet
   Supporting WFO:  Medford    
   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.

COW CREEK--GALESVILLE RESERVOIR   (GSVO3)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-09
Forecast Period: October 9 to February 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 123 2026-11-28
90 % 249 2026-12-05
70 % 476 2026-12-17
50 % 951 2026-12-31
30 % 1867 2027-01-14
10 % 2877 2027-01-24
05 % 5274 2027-01-30

Peakflow exceedence plot for GSVO3

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