LEWIS − ARIEL (MERW1)
   State:  Washington
   County:  Cowlitz
   Latitude:  45 57' 2" North
   Longitude:  122 33' 51" West
   Elevation:  44 ft

   Supporting NWS Forecast Office: WFO Portland

   
Click for NWS Official River Forecasts for MERW1
Daily Historical Statistics for December 30, 2025
Mean Stage: 5.32 ft  Mean Flow: 7760 cfs
Max Stage: 17.61 ft  Max Flow: 43300 cfs (1938)
Min Stage:  1.34 ft   Min Flow: 823 cfs (1953)

Statistics based on water years: 1924-2025
* 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 MERW1


For Data Used In Plot   "label