USGS 08012150 Mermentau River At Mermentau, LA

PROVISIONAL DATA SUBJECT TO REVISION

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Data are tidally affected--Astronomical tides cause significant cycles of approximately 24.84 hours at this site. Because a different portion of The 24.84-hour tidal cycle is averaged in successive daily (24-hour) computations, a systematic secondary oscillation, unrelated to basin hydrology and having a period of about two weeks may be apparent in daily data published from October 1984 to September 2015.
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This station managed by the Baton Rouge Field Office.

Available Parameters Available Period
  
2000-10-01  2026-01-04
2007-10-01  2026-01-04
2023-10-01  2026-01-04
2025-09-06  2026-01-04
2025-09-06  2026-01-04







 (7)
 
  -- or --

 

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

Discharge, cubic feet per second
Most recent instantaneous value: 490 01-04-2026   12:15 CST
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Daily discharge, cubic feet per second -- statistics for Jan 4 based on 20 water years of record more
Min
(2014)		 25th
percen-
tile		 Most Recent
Instantaneous
Value Jan 4		 Median Mean 75th
percen-
tile		 Max
(2013)
-480 32 490 925 2640 5490 9990

Gage height, feet
Most recent instantaneous value: 1.93 01-04-2026   12:15 CST
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Stream water level elevation above NAVD 1988, in feet, [NAVD88 GEOID18]
Most recent instantaneous value: 0.64 01-04-2026   12:15 CST
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Water velocity reading from field sensor, feet per second, [XVel.RA.SL.1500]
Most recent instantaneous value: 0.04 01-04-2026   12:15 CST
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Mean water velocity for discharge computation, feet per second
Most recent instantaneous value: 0.05 01-04-2026   12:15 CST
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