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USGS 14243000 COWLITZ RIVER AT CASTLE ROCK, WA

PROVISIONAL DATA SUBJECT TO REVISION

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Additional Data and Information.-- Latest shifted rating.

Flood Stage.--The National Weather Service Flood Stage for this station is 48.0 feet.

Funding for this site is provided by the cooperators / programs below:

Boating safety tips

This station managed by the Western Washington Field Office (Tacoma).

Available Parameters Available Period
  
1961-12-20  2026-02-21
2007-10-01  2026-02-21
2008-10-01  2026-02-21
2020-10-29  2026-02-21
2023-02-21  2026-02-21
2023-02-21  2026-02-21







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second
Most recent instantaneous value: 8980 02-21-2026   13:30 PST
Graph of Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Feb 21 based on 98 water years of record more
Min
(1941)		 25th
percen-
tile		 Most Recent
Instantaneous
Value Feb 21		 Median Mean 75th
percen-
tile		 Max
(1968)
3620 7560 8980 10500 12600 14100 46500

Gage height, feet, [NAVD 1988, feet]
Most recent instantaneous value: 34.68 02-21-2026   13:30 PST
Graph of Gage height, feet, [NAVD 1988, feet]

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Stream water level elevation above NAVD 1988, in feet
Most recent instantaneous value: 34.68 02-21-2026   13:30 PST
Graph of Stream water level elevation above NAVD 1988, in feet

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), RIGHT BANK, [Analite NEP5000]
Most recent instantaneous value: 8.8 02-21-2026   13:20 PST
Graph of Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), [Analite NEP5000]

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Water velocity reading from field sensor, feet per second, RIGHT BANK, [from ADVM 1500kHz]
Most recent instantaneous value: 2.39 02-21-2026   13:15 PST
Graph of Water velocity reading from field sensor, feet per second, [from ADVM 1500kHz]

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Water velocity reading from field sensor, feet per second, RIGHT BANK, [from ADVM 500kHz]
Most recent instantaneous value: 2.10 02-21-2026   13:15 PST
Graph of Water velocity reading from field sensor, feet per second, [from ADVM 500kHz]

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