SNOFLO



WYNOOCHEE RIVER

RIVER LEVELS
April 30, 2025


Total streamflow across the Wynoochee River was last observed at 1,148 cfs, and is expected to yield approximately 2,277 acre-ft of water today; about 85% of normal. Average streamflow for this time of year is 1,347 cfs, with recent peaks last observed on 2020-01-24 when daily discharge volume was observed at 21,710 cfs.

Maximum discharge along the river is currently at the Wynoochee River Above Black Creek Nr Montesano reporting a streamflow rate of 513 cfs. This is also the highest stage along the Wynoochee River, with a gauge stage of 27.75 ft at this location. This river is monitored from 3 different streamgauging stations along the Wynoochee River, the highest being situated at an altitude of 632 ft, the Wynoochee River Near Grisdale.

Last Updated 2025-04-30
Discharge Volume 2,277 ACRE-FT
Streamflow 1,148.0 cfs
-16.0 cfs (-1.37%)
Percent of Normal 85.24%
Maximum 21,710.0 cfs
2020-01-24
Seasonal Avg 1,347 cfs
       
River Streamflow Levels
Created with Highcharts 8.0.0Total River Discharge (cfs)21. Apr22. Apr23. Apr24. Apr25. Apr26. Apr27. Apr28. Apr29. Apr30. Apr050010001500
Seasonal Discharge Comparison
Created with Highcharts 8.0.0Total River Discharge (cfs)1. Jan1. Feb1. Mar1. Apr1. May1. Jun1. Jul1. Aug1. Sep1. Oct1. Nov1. Dec1. Jan010k20k30k
Maximum Streamflow Discharge
Created with Highcharts 8.0.0YearAnnual Peak Discharge(cfs)2010201120122013201420152016201720182019202020212022202320242025202610k20k40k

Weather Forecast

Created with Highcharts 8.0.0humidity0.1"0.1"Thu May 1Fri May 2Sat May 3Sun May 4Mon May 532°64°96°0%120%60%180%
Streamflow Elevation Profile
Created with Highcharts 8.0.0

The Wynoochee River is a 60-mile (97 km) long river located in the Olympic Peninsula in the U.S. state of Washington. A tributary of the Chehalis River, the Wynoochee River rises in the Olympic Mountains within the Olympic National Park and flows generally south. Its drainage basin is 218 square miles (560 km2) in area. The name Wynoochee comes from the Lower Chehalis placename /xʷənúɬč/, meaning "shifting".