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 2027
Ensemble Date: 2026-10-05
 Forecast Period: October 5 to February 1
Exceedence
Probability 		Stage
feet 		Discharge
CFS 		Probable
Date of Peak
95 % 12.39 3630 2026-11-05
90 % 13.36 5309 2026-11-13
70 % 14.83 8041 2026-12-02
50 % 15.65 9640 2026-12-10
30 % 18.68 15914 2026-12-25
10 % 21.12 21366 2027-01-26
05 % 22.15 23735 2027-01-30

Peakflow exceedence plot for ELWW1

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