CHEHALIS − AT PORTER (CRPW1)
   State:  Washington
   County:  Grays Harbor
   Latitude:  46 56' 21" North
   Longitude:  123 18' 50" West
   Elevation:  24 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for CRPW1
   


   Action Stage:  
45.5 ft
   Flood Stage:  
48 ft
   Moderate Flood Stage:  
50 ft
   Major Flood Stage:  
52 ft
Daily Historical Statistics for January 20, 2026
Mean Stage: 41.41 ft  Mean Flow: 9790 cfs
Max Stage: 50.24 ft  Max Flow: 39800 cfs (1986)
Min Stage:  32.90 ft   Min Flow: 1580 cfs (2001)

Statistics based on water years: 1953-2024
* statistics estimated based on current rating

Record Stage: 
53.17 ft
Record Flow: 
102000 cfs
Date of Record: 
December 5, 2007

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for CRPW1

Data Used In Plot   "label   USGS Observations