Peakflow Forecasts Header

ELWHA--AT MCDONALD BRIDGE NEAR PORT ANGELES
   State:  Washington    County:  CLALLAM
   Latitude:  48 3' 18" North    Longitude:  123 34' 55" West
   Elevation:  200 feet
   Supporting WFO:  Seattle    
   Action Stage:  17.3'   Flood Stage:  20'   Moderate Flood Stage:  21.5'
   Major Flood Stage:  23'

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.

ELWHA--AT MCDONALD BRIDGE NEAR PORT ANGELES   (ELWW1)
Forecasts for Water Year 2026
Ensemble Date: 2026-01-23
 Forecast Period: January 23 to May 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 11.34 2153 2026-02-02
90 % 11.39 2214 2026-02-02
70 % 12.36 3582 2026-02-17
50 % 12.82 4328 2026-03-02
30 % 13.77 6059 2026-03-17
10 % 15.29 8932 2026-04-15
05 % 16.00 10344 2026-04-25

Peakflow exceedence plot for ELWW1

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