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: 2025-11-16
 Forecast Period: November 16 to March 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 33.06 7616 2025-12-06
90 % 34.43 8306 2025-12-10
70 % 40.75 11768 2025-12-22
50 % 44.78 14212 2026-01-10
30 % 50.59 18040 2026-01-31
10 % 55.97 21884 2026-02-21
05 % 57.66 23156 2026-02-24

Peakflow exceedence plot for MCMO3

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