Overview Realtime Historical Map View
Heat Advisory
2026-07-19T18:00:00-05:00

* WHAT...For the first Heat Advisory, heat index values up to 109. For the second Heat Advisory, heat index values up to 110 expected. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the first Heat Advisory, until 6 PM CDT this evening. For the second Heat Advisory, from noon to 7 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Bayou Lafourche Sw Of Donaldsonville, La Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 319.5
01-02 324.6
01-03 315.4
01-04 304.9
01-05 321.4
01-06 320.7
01-07 318.0
01-08 320.8
01-09 305.1
01-10 336.0
01-11 331.11
01-12 333.0
01-13 327.44
01-14 327.44
01-15 332.67
01-16 324.22
01-17 320.82
01-18 320.18
01-19 329.0
01-20 333.27
01-21 327.0
01-22 341.18
01-23 300.8
01-24 327.18
01-25 329.82
01-26 329.4
01-27 316.4
01-28 323.36
01-29 331.73
01-30 337.0
01-31 330.83
02-01 332.5
02-02 288.52
02-03 335.1
02-04 335.9
02-05 304.03
02-06 321.0
02-07 309.84
02-08 298.55
02-09 335.0
02-10 326.18
02-11 319.27
02-12 318.82
02-13 321.55
02-14 335.17
02-15 323.58
02-16 326.92
02-17 324.82
02-18 321.73
02-19 339.2
02-20 315.25
02-21 319.55
02-22 329.45
02-23 337.0
02-24 316.18
02-25 321.3
02-26 335.78
02-27 327.36
02-28 330.45
02-29 348.0
03-01 362.9
03-02 353.6
03-03 361.2
03-04 372.1
03-05 371.2
03-06 354.5
03-07 358.42
03-08 365.25
03-09 361.5
03-10 345.33
03-11 329.5
03-12 344.58
03-13 366.91
03-14 343.08
03-15 353.83
03-16 355.58
03-17 355.67
03-18 356.25
03-19 364.77
03-20 367.25
03-21 369.08
03-22 383.27
03-23 393.83
03-24 352.97
03-25 339.86
03-26 342.46
03-27 362.62
03-28 356.77
03-29 364.62
03-30 362.0
03-31 360.17
04-01 365.23
04-02 365.31
04-03 357.38
04-04 362.77
04-05 332.92
04-06 336.0
04-07 360.62
04-08 344.0
04-09 343.33
04-10 358.46
04-11 322.05
04-12 362.0
04-13 363.25
04-14 317.51
04-15 283.42
04-16 322.14
04-17 333.91
04-18 322.82
04-19 361.36
04-20 360.45
04-21 368.42
04-22 365.58
04-23 360.08
04-24 365.0
04-25 356.73
04-26 380.64
04-27 382.73
04-28 382.2
04-29 391.7
04-30 396.7
05-01 381.82
05-02 334.09
05-03 355.18
05-04 357.0
05-05 359.75
05-06 370.25
05-07 375.33
05-08 359.18
05-09 356.0
05-10 333.27
05-11 333.27
05-12 313.75
05-13 352.58
05-14 358.82
05-15 339.03
05-16 358.18
05-17 376.18
05-18 350.25
05-19 343.88
05-20 348.45
05-21 339.75
05-22 340.67
05-23 363.75
05-24 361.08
05-25 372.75
05-26 378.0
05-27 382.58
05-28 376.92
05-29 362.47
05-30 363.92
05-31 351.82
06-01 365.08
06-02 365.75
06-03 386.55
06-04 388.64
06-05 350.3
06-06 344.83
06-07 351.82
06-08 387.73
06-09 389.0
06-10 397.36
06-11 395.45
06-12 403.7
06-13 400.0
06-14 405.8
06-15 393.64
06-16 382.82
06-17 371.55
06-18 362.18
06-19 344.9
06-20 370.73
06-21 353.64
06-22 363.45
06-23 361.09
06-24 365.91
06-25 365.27
06-26 345.09
06-27 370.27
06-28 365.36
06-29 360.55
06-30 353.45
07-01 371.0
07-02 373.55
07-03 378.09
07-04 377.73
07-05 349.42
07-06 352.25
07-07 336.82
07-08 346.55
07-09 369.9
07-10 378.83
07-11 375.67
07-12 374.0
07-13 363.82
07-14 356.25
07-15 377.0
07-16 390.0
07-17 395.36
07-18 389.55
07-19 386.09
07-20 356.55
07-21 374.2
07-22 372.5
07-23 351.0
07-24 350.91
07-25 363.36
07-26 365.0
07-27 363.73
07-28 343.82
07-29 350.73
07-30 363.82
07-31 363.0
08-01 351.0
08-02 366.64
08-03 365.27
08-04 366.27
08-05 356.09
08-06 364.82
08-07 365.09
08-08 374.7
08-09 374.1
08-10 352.2
08-11 383.1
08-12 370.2
08-13 351.4
08-14 327.55
08-15 333.91
08-16 344.2
08-17 355.5
08-18 363.0
08-19 351.4
08-20 382.89
08-21 371.22
08-22 333.33
08-23 359.36
08-24 349.9
08-25 330.4
08-26 354.27
08-27 347.45
08-28 343.36
08-29 335.91
08-30 311.49
08-31 346.89
09-01 327.97
09-02 337.45
09-03 350.0
09-04 358.0
09-05 357.27
09-06 361.55
09-07 354.27
09-08 357.27
09-09 357.0
09-10 357.73
09-11 361.36
09-12 357.91
09-13 349.82
09-14 337.6
09-15 321.4
09-16 313.7
09-17 314.3
09-18 315.4
09-19 328.7
09-20 330.4
09-21 333.1
09-22 314.78
09-23 331.56
09-24 331.78
09-25 347.3
09-26 347.45
09-27 350.09
09-28 349.27
09-29 339.09
09-30 335.5
10-01 325.3
10-02 327.3
10-03 338.5
10-04 342.2
10-05 351.18
10-06 343.58
10-07 337.5
10-08 336.42
10-09 342.92
10-10 331.83
10-11 332.33
10-12 355.67
10-13 330.92
10-14 341.08
10-15 341.42
10-16 323.73
10-17 333.5
10-18 338.25
10-19 338.08
10-20 338.08
10-21 325.8
10-22 345.0
10-23 346.25
10-24 328.67
10-25 340.5
10-26 311.42
10-27 332.42
10-28 337.92
10-29 337.0
10-30 331.83
10-31 323.83
11-01 320.0
11-02 339.36
11-03 338.42
11-04 339.17
11-05 341.17
11-06 332.18
11-07 326.82
11-08 305.64
11-09 319.09
11-10 327.36
11-11 328.18
11-12 319.91
11-13 325.73
11-14 341.83
11-15 333.75
11-16 337.17
11-17 331.18
11-18 341.73
11-19 342.73
11-20 341.55
11-21 338.0
11-22 324.17
11-23 329.82
11-24 325.4
11-25 324.4
11-26 317.18
11-27 317.0
11-28 316.4
11-29 329.0
11-30 334.36
12-01 350.82
12-02 340.18
12-03 340.91
12-04 337.27
12-05 332.0
12-06 325.2
12-07 332.55
12-08 336.91
12-09 340.67
12-10 336.92
12-11 332.33
12-12 350.82
12-13 334.36
12-14 328.0
12-15 326.64
12-16 339.73
12-17 338.2
12-18 341.1
12-19 333.2
12-20 310.67
12-21 320.89
12-22 305.7
12-23 323.2
12-24 334.6
12-25 324.0
12-26 336.6
12-27 320.33
12-28 276.77
12-29 294.38
12-30 318.3
12-31 317.4

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index