Peakflow Forecasts Header

S YAMHILL--AT MCMINNVILLE
   State:  Oregon    County:  YAMHILL
   Latitude:  45 12' 20" North    Longitude:  123 10' 53" West
   Elevation:  62 feet
   Supporting WFO:  Portland    
   Action Stage:  45'   Flood Stage:  50'   Moderate Flood Stage:  56'
   Major Flood Stage:  59'

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.

S YAMHILL--AT MCMINNVILLE   (MCMO3)
Forecasts for Water Year 2026
Ensemble Date: 2026-06-14
 Forecast Period: June 14 to October 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 10.65 204 2026-06-14
90 % 10.65 204 2026-06-14
70 % 10.65 204 2026-06-14
50 % 10.72 212 2026-06-28
30 % 11.27 285 2026-09-20
10 % 11.87 372 2026-09-27
05 % 12.45 465 2026-09-29

Peakflow exceedence plot for MCMO3

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