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
2024
Ensemble Date: 2024-04-18
Forecast Period: April 18 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 2.58 224 2024-04-18
90 % 2.58 224 2024-04-18
70 % 2.58 224 2024-04-18
50 % 3.01 373 2024-05-05
30 % 3.76 703 2024-05-17
10 % 4.56 1150 2024-06-06
05 % 4.84 1343 2024-06-08

Peakflow exceedence plot for WLAO3

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