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 July 11, 2025
Mean Stage: 2.26 ft  Mean Flow: 2080 cfs
Max Stage: 4.31 ft  Max Flow: 5650 cfs (1956)
Min Stage:  0.72 ft   Min Flow: 175 cfs (1931)

Statistics based on water years: 1909-2024
* 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