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  2025-07-09
2007-10-01  2025-07-09
2023-10-01  2025-07-09
2025-03-11  2025-07-09
2025-03-11  2025-07-09







 (7)
 
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Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second
Most recent instantaneous value: 2390 07-09-2025   13:15 CDT
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Daily discharge, cubic feet per second -- statistics for Jul 9 based on 22 water years of record more
Min
(1999)		 25th
percen-
tile		 Median Mean Most Recent
Instantaneous
Value Jul 9		 75th
percen-
tile		 Max
(2004)
-1640 -54 1020 1370 2390 2420 5700

Gage height, feet
Most recent instantaneous value: 2.77 07-09-2025   13:15 CDT
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Stream water level elevation above NAVD 1988, in feet, [NAVD88 GEOID18]
Most recent instantaneous value: 1.48 07-09-2025   13:15 CDT
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Water velocity reading from field sensor, feet per second, [XVel.RA.SL.1500]
Most recent instantaneous value: 0.27 07-09-2025   13:15 CDT
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Mean water velocity for discharge computation, feet per second
Most recent instantaneous value: 0.24 07-09-2025   13:15 CDT
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