Peakflow Forecasts Header

S YAMHILL--NEAR WILLAMINA
   State:  Oregon    County:  POLK
   Latitude:  45 2' 49" North    Longitude:  123 30' 10" West
   Elevation:  236 feet
   Supporting WFO:  Portland    

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--NEAR WILLAMINA   (WLAO3)
Forecasts for Water Year
2022
Ensemble Date: 2021-12-08
Forecast Period: December 8 to April 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 6.00 2477 2021-12-21
90 % 6.00 2911 2021-12-23
70 % 8.00 4703 2022-01-02
50 % 10.00 7038 2022-01-20
30 % 11.00 9157 2022-02-04
10 % 13.00 11441 2022-02-24
05 % 15.00 15016 2022-03-07

Peakflow exceedence plot for WLAO3

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