Peakflow Forecasts Header

N UMPQUA--AT WINCHESTER
   State:  Oregon    County:  DOUGLAS
   Latitude:  43 16' 4" North    Longitude:  123 24' 33" West
   Elevation:  372 feet
   Supporting WFO:  Medford    
   Action Stage:  18'   Flood Stage:  26'   Moderate Flood Stage:  30'
   Major Flood Stage:  31'

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.

N UMPQUA--AT WINCHESTER   (WNRO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-05
 Forecast Period: June 5 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 2.62 1520 2026-06-10
90 % 2.62 1520 2026-06-10
70 % 2.62 1520 2026-06-10
50 % 2.62 1520 2026-06-10
30 % 2.70 1605 2026-06-30
10 % 3.13 2119 2026-09-19
05 % 5.49 6321 2026-09-29

Peakflow exceedence plot for WNRO3

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