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 2027
Ensemble Date: 2026-10-10
 Forecast Period: October 10 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 22.94 3291 2026-11-25
90 % 29.54 5958 2026-11-30
70 % 37.79 10090 2026-12-23
50 % 42.81 12997 2027-01-04
30 % 49.42 17239 2027-01-14
10 % 54.83 21046 2027-01-26
05 % 56.30 22128 2027-01-29

Peakflow exceedence plot for MCMO3

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