COLUMBIA − AT ST HELENS (SHNO3)
   State:  Oregon
   County:  Columbia
   Latitude:  45 52' 49" North
   Longitude:  122 47' 45" West
   Elevation:  1 ft

   Supporting NWS Forecast Office: WFO Portland
   Click for NWS Official River Forecasts for SHNO3
   

   Action Stage:  14.5 ft
   Flood Stage:  15.5 ft
   Moderate Flood Stage:  18 ft
   Major Flood Stage:  21 ft

Record Stage: 27.1 ft
Date of Record: June 14, 1948

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

Hydrograph plot for SHNO3

Data Used In Plot   "label   United States Geological Survey   


Hydrograph plot for SHNO3

Data Used In Plot   "label   United States Geological Survey