Overview Realtime Historical Map View
Heat Advisory
2026-08-23T20:00:00-05:00

* WHAT...For the first Heat Advisory, heat index values up to 111F. For the second Heat Advisory, heat index values up to 111F expected. * WHERE...Portions of central, south central, southwest, and west central Louisiana and southeast Texas. * WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from 11 AM to 8 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Mermentau River At Mermentau, La Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 3530.72
01-02 5527.5
01-03 4966.11
01-04 4993.55
01-05 4896.55
01-06 5854.78
01-07 5820.89
01-08 5162.89
01-09 6617.14
01-10 5780.0
01-11 7301.76
01-12 6748.55
01-13 7915.0
01-14 8092.0
01-15 7824.0
01-16 6482.82
01-17 4743.7
01-18 5607.89
01-19 5181.64
01-20 4081.17
01-21 3581.55
01-22 3613.0
01-23 3194.9
01-24 3092.45
01-25 3607.73
01-26 3880.77
01-27 4153.17
01-28 4264.31
01-29 4253.64
01-30 4109.08
01-31 3954.69
02-01 3885.04
02-02 4352.0
02-03 4233.08
02-04 4429.89
02-05 4724.73
02-06 4432.45
02-07 4252.1
02-08 3587.58
02-09 3577.25
02-10 3872.78
02-11 4004.45
02-12 4847.64
02-13 4861.54
02-14 4142.54
02-15 4602.27
02-16 3893.76
02-17 4476.36
02-18 3412.92
02-19 3703.42
02-20 3951.62
02-21 4675.85
02-22 4276.83
02-23 3567.74
02-24 4101.92
02-25 4408.92
02-26 3780.79
02-27 4252.58
02-28 3432.64
02-29 2494.75
03-01 3161.58
03-02 2721.23
03-03 2973.91
03-04 2678.46
03-05 2656.0
03-06 2044.54
03-07 2379.44
03-08 1669.67
03-09 2011.09
03-10 2640.75
03-11 2536.0
03-12 4005.98
03-13 4037.42
03-14 3981.25
03-15 4561.8
03-16 4472.08
03-17 4171.0
03-18 4081.62
03-19 3771.85
03-20 2356.62
03-21 2719.83
03-22 2895.25
03-23 2335.4
03-24 2583.85
03-25 2727.08
03-26 2927.18
03-27 2922.1
03-28 3178.56
03-29 2781.4
03-30 2299.31
03-31 3344.4
04-01 3403.36
04-02 2804.07
04-03 2466.69
04-04 2898.78
04-05 3091.03
04-06 3085.17
04-07 3071.5
04-08 2946.93
04-09 3260.2
04-10 2807.57
04-11 3401.58
04-12 3287.38
04-13 3862.7
04-14 3723.64
04-15 3990.92
04-16 3411.89
04-17 3751.17
04-18 3538.27
04-19 4521.67
04-20 3803.17
04-21 4844.8
04-22 4878.01
04-23 4700.89
04-24 3814.67
04-25 3943.67
04-26 4004.0
04-27 3437.03
04-28 3587.1
04-29 2819.0
04-30 3406.09
05-01 3422.92
05-02 3230.58
05-03 3877.18
05-04 3398.5
05-05 5415.77
05-06 5921.08
05-07 6044.82
05-08 3422.25
05-09 5040.12
05-10 7714.5
05-11 6526.82
05-12 8797.0
05-13 8006.82
05-14 6993.4
05-15 5797.45
05-16 4686.33
05-17 4166.36
05-18 4197.9
05-19 4057.56
05-20 5631.86
05-21 5634.44
05-22 3136.88
05-23 1844.33
05-24 1788.54
05-25 4301.88
05-26 4586.71
05-27 3387.33
05-28 3260.44
05-29 4026.3
05-30 3939.4
05-31 3564.9
06-01 2857.91
06-02 2904.8
06-03 2300.49
06-04 2713.09
06-05 2659.7
06-06 3390.08
06-07 3085.83
06-08 3090.74
06-09 3786.0
06-10 3162.04
06-11 2974.42
06-12 2969.4
06-13 2832.09
06-14 2882.33
06-15 2794.09
06-16 2297.75
06-17 2058.58
06-18 1848.32
06-19 1652.55
06-20 1473.6
06-21 1541.18
06-22 2114.56
06-23 1933.16
06-24 1627.1
06-25 1527.65
06-26 1892.3
06-27 2238.9
06-28 2128.08
06-29 1982.81
06-30 2833.91
07-01 2503.4
07-02 2188.0
07-03 2550.7
07-04 2123.2
07-05 1845.25
07-06 1904.75
07-07 1712.0
07-08 1467.85
07-09 1840.0
07-10 1688.5
07-11 2002.92
07-12 2172.31
07-13 2154.67
07-14 2260.28
07-15 2550.42
07-16 2295.23
07-17 2635.25
07-18 2794.09
07-19 3091.69
07-20 3841.42
07-21 3895.0
07-22 4450.15
07-23 4458.67
07-24 4315.17
07-25 4190.09
07-26 3123.3
07-27 3274.58
07-28 3068.75
07-29 2659.69
07-30 2141.69
07-31 2327.23
08-01 2025.56
08-02 2284.36
08-03 2063.36
08-04 1801.47
08-05 1742.33
08-06 1403.56
08-07 1511.9
08-08 1739.38
08-09 1457.27
08-10 1380.73
08-11 1447.67
08-12 1523.0
08-13 1318.83
08-14 4112.82
08-15 3863.27
08-16 4666.4
08-17 5391.11
08-18 5275.23
08-19 5234.6
08-20 4413.73
08-21 4188.45
08-22 3324.58
08-23 3168.0
08-24 1302.0
08-25 1501.55
08-26 2611.18
08-27 2295.77
08-28 3643.8
08-29 4372.46
08-30 4806.3
08-31 4260.96
09-01 5415.77
09-02 4489.91
09-03 4420.1
09-04 3825.67
09-05 3501.33
09-06 2745.84
09-07 2388.21
09-08 2128.42
09-09 1847.75
09-10 1211.07
09-11 1218.81
09-12 1256.92
09-13 1117.42
09-14 1063.79
09-15 1168.19
09-16 1558.1
09-17 1374.11
09-18 2115.67
09-19 1593.86
09-20 1943.5
09-21 1958.4
09-22 2333.56
09-23 1863.5
09-24 2029.0
09-25 1781.13
09-26 1943.0
09-27 1992.33
09-28 1370.64
09-29 1369.59
09-30 1809.25
10-01 1974.51
10-02 1946.3
10-03 1498.04
10-04 1326.58
10-05 1326.0
10-06 1464.67
10-07 1763.44
10-08 1413.67
10-09 1128.18
10-10 1829.1
10-11 1925.18
10-12 2093.57
10-13 2733.5
10-14 2836.85
10-15 2757.33
10-16 3217.5
10-17 2630.3
10-18 2208.59
10-19 1891.08
10-20 1710.0
10-21 1580.3
10-22 1124.8
10-23 1353.43
10-24 1410.0
10-25 1099.92
10-26 1622.78
10-27 1854.63
10-28 1634.4
10-29 1981.88
10-30 1190.19
10-31 1150.22
11-01 2272.2
11-02 1820.44
11-03 2184.03
11-04 1888.6
11-05 2019.45
11-06 1858.0
11-07 1684.64
11-08 2690.67
11-09 2055.41
11-10 1859.11
11-11 1827.5
11-12 1854.3
11-13 1428.66
11-14 1239.25
11-15 1621.04
11-16 1505.0
11-17 1390.51
11-18 1082.19
11-19 1090.89
11-20 770.57
11-21 1482.14
11-22 2052.0
11-23 1334.5
11-24 1640.63
11-25 1456.5
11-26 1184.09
11-27 2015.56
11-28 2322.35
11-29 2417.54
11-30 1905.5
12-01 1773.66
12-02 2551.71
12-03 2428.22
12-04 2241.74
12-05 1878.4
12-06 1678.91
12-07 1223.82
12-08 1396.9
12-09 2676.2
12-10 3159.44
12-11 1922.58
12-12 2059.25
12-13 2205.38
12-14 2045.98
12-15 2332.87
12-16 2499.0
12-17 2756.18
12-18 3204.65
12-19 2646.62
12-20 2722.92
12-21 3517.4
12-22 2534.38
12-23 2631.07
12-24 3069.22
12-25 2418.67
12-26 3078.08
12-27 3216.09
12-28 3335.33
12-29 4024.0
12-30 3635.36
12-31 3427.32

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index