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
2026
Ensemble Date: 2026-06-05
Forecast Period: June 5 to October 1
Exceedence
Probability
Inflow
CFS
Probable
Date of Peak
95 % 21 2026-06-09
90 % 21 2026-06-09
70 % 27 2026-07-06
50 % 39 2026-08-24
30 % 54 2026-09-19
10 % 76 2026-09-26
05 % 113 2026-09-30

Peakflow exceedence plot for GSVO3

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