Peakflow Forecasts Header

WILLAPA--NEAR WILLAPA
   State:  Washington    County:  PACIFIC
   Latitude:  46 39' 3" North    Longitude:  123 39' 7" West
   Elevation:  4 feet
   Supporting WFO:  Portland    
   Action Stage:  20'   Flood Stage:  21'
   Major Flood Stage:  
24'

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.

WILLAPA--NEAR WILLAPA   (WILW1)
Forecasts for Water Year
2024
Ensemble Date: 2024-04-25
Forecast Period: April 25 to August 1
Exceedence
Probability
Stage
feet
Discharge
CFS
Probable
Date of Peak
95 % 5.63 641 2024-04-26
90 % 5.63 641 2024-04-26
70 % 5.63 641 2024-04-26
50 % 5.75 681 2024-05-08
30 % 6.37 895 2024-05-19
10 % 7.04 1143 2024-06-10
05 % 7.84 1469 2024-06-14

Peakflow exceedence plot for WILW1

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