Peakflow Forecasts Header

SF COQUILLE--AT POWERS
   State:  Oregon    County:  COOS
   Latitude:  42 53' 30" North    Longitude:  124 4' 9" West
   Elevation:  220 feet
   Supporting WFO:  Medford    
   Action Stage:  10'

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.

SF COQUILLE--AT POWERS   (POWO3)
Forecasts for Water Year
2027
Ensemble Date: 2026-10-05
Forecast Period: October 5 to February 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.35 2304 2026-11-18
90 % 7.72 4992 2026-11-19
70 % 10.09 8986 2026-12-11
50 % 10.75 10374 2026-12-25
30 % 12.25 13958 2027-01-10
10 % 14.35 20072 2027-01-21
05 % 16.32 24973 2027-01-24

Peakflow exceedence plot for POWO3

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