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USGS Daily Statistics for Louisiana

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 08012400 Mermentau River @ Lake Arthur, LA


Jefferson Davis Parish, Louisiana
Hydrologic Unit Code 08080202
Latitude  30°04'22.2", Longitude  92°39'33.4" NAD83
Drainage area 1,723  square miles
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2022-10-01 -> 2023-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 9,880 17,700 145               -17 4,830
2 9,340 18,800                 -190 3,660
3 9,930 19,900                 -167 4,330
4 8,950 18,700 2,210               -334 3,920
5 7,680 16,900 290               2,000 2,720
6 5,330 14,400 814               2,190 2,600
7 5,000 12,000 1,460               1,400 1,850
8 6,400 9,010 1,300               572 1,610
9 8,360 12,400 1,290               343 1,130
10 7,050 12,000 1,480               676 883
11 5,290 11,800                 701 2,700
12 6,260 9,510 3,180               930 5,010
13 5,090 7,510 981               120 4,020
14 2,310 5,700               -311 426 7,050
15 1,520 5,810               3.2 3,190 8,820
16 1,670 6,760               255 2,530 10,400
17 2,750 7,510               450 1,700 12,300
18 -98 3,880               206 1,120 13,000
19 3,080 4,390               -564 1,300 13,300
20 2,810 4,100               -105 1,160 16,200
21 4,580 4,660               256 836 16,600
22 7,740                 -23 761 16,200
23 7,680 4,600               -53 149 15,800
24   2,640               -128 372 11,600
25 12,600 2,200               1,100 1,830 8,500
26 12,400 1,330               111 2,650 7,030
27 11,600 1,420               -172   6,220
28 10,100 2,050               69   4,690
29 10,700                 384   3,750
30 15,800                 485 8,210 6,530
31 17,100                 343   8,980