COWLITZ − NEAR KOSMOS (COKW1)
   State:  Washington
   County:  Lewis
   Latitude:  46 27' 58" North
   Longitude:  122 7' 5" West
   Elevation:  780 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for COKW1
   

Daily Historical Statistics for July 18, 2026
Mean Stage: 67.25 ft  Mean Flow: 3510 cfs
Max Stage: 71.34 ft  Max Flow: 10100 cfs (1974)
Min Stage:  64.85 ft   Min Flow: 1260 cfs (2015)

Statistics based on water years: 1948-2022
* statistics estimated based on current rating

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

Hydrograph plot for COKW1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for COKW1

Data Used In Plot   "label   USGS Observations