River Information and Forecasts Header
COWLITZ--AT CASTLE ROCK (CASW1)
   State:  Washington    County:  COWLITZ
   Latitude:  46 16' 30" North    Longitude:  122 54' 47" West
   Elevation:  20 feet
   Supporting WFO:  Portland    NWS Official River Forecasts Click Here
   Action Stage:  46'   Flood Stage:  48'
   Moderate Flood Stage:  54'
   Major Flood Stage:  57'

   Record Stage:  55.76'  Record Flow:  139000 cfs
   Date of Record:  December 23, 1933
Daily Historical Flow Statistics
for June 27

Mean Stage: 34.68 ft  Mean Flow: 8020 cfs
Max Stage: 37.50 ft  Max Flow: 16800 cfs (1971)
Min Stage:  32.53 ft   Min Flow: 2740 cfs (1968)

Statistics based on water years: 1927-2020
The 4-10 Day Trend Forecast is based on model guidance only. Daily variation and uncertainty of forecasts during this period is high.

Hydrograph plot for CASW1

For Data Used In Plot   "label