CHEHALIS − NEAR GRAND MOUND (CGMW1)
   State:  Washington
   County:  Thurston
   Latitude:  46 46' 34" North
   Longitude:  123 2' 4" West
   Elevation:  124 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for CGMW1

   Action Stage:  
138.5 ft
   Flood Stage:  
141 ft
   Moderate Flood Stage:  
142.5 ft
   Major Flood Stage:  
144 ft
Daily Historical Statistics for September 22, 2023
Mean Stage: 129.22 ft  Mean Flow: 381 cfs
Max Stage: 131.05 ft  Max Flow: 2000 cfs (1959)
Min Stage:  128.65 ft   Min Flow: 101 cfs (1951)

Statistics based on water years: 1929-2021
* statistics estimated based on current rating

Record Stage: 
147.26 ft
Record Flow: 
79100 cfs
Date of Record: 
December 4, 2007

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

Hydrograph plot for CGMW1


For Data Used In Plot   "label