Overview Realtime Historical Map View
Heat Advisory
2026-07-20T20:00:00-05:00

* WHAT...Heat index values up to 105 expected. * WHERE...All of Central Iowa. * WHEN...From noon to 8 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

South Fork Chariton River Near Promise City, Ia Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 102.97
01-02 73.28
01-03 49.61
01-04 40.01
01-05 33.41
01-06 34.4
01-07 38.38
01-08 173.53
01-09 476.47
01-10 60.41
01-11 54.22
01-12 50.18
01-13 61.1
01-14 53.13
01-15 61.13
01-16 64.7
01-17 36.49
01-18 42.15
01-19 44.9
01-20 60.5
01-21 57.3
01-22 56.15
01-23 57.7
01-24 63.5
01-25 42.33
01-26 20.95
01-27 41.3
01-28 39.39
01-29 57.1
01-30 98.23
01-31 98.77
02-01 108.37
02-02 55.67
02-03 811.13
02-04 1109.5
02-05 181.43
02-06 122.9
02-07 108.67
02-08 96.67
02-09 57.75
02-10 61.0
02-11 45.33
02-12 30.8
02-13 27.7
02-14 9.7
02-15 10.83
02-16 14.23
02-17 607.62
02-18 88.8
02-19 735.0
02-20 354.17
02-21 847.33
02-22 128.57
02-23 111.77
02-24 73.03
02-25 67.67
02-26 56.33
02-27 42.33
02-28 38.33
02-29 38.5
03-01 56.33
03-02 34.37
03-03 26.79
03-04 26.62
03-05 23.16
03-06 24.89
03-07 50.82
03-08 93.49
03-09 59.14
03-10 82.54
03-11 259.8
03-12 86.44
03-13 73.23
03-14 199.53
03-15 89.72
03-16 91.59
03-17 70.74
03-18 53.54
03-19 86.74
03-20 139.35
03-21 69.45
03-22 39.52
03-23 83.51
03-24 166.33
03-25 64.06
03-26 57.55
03-27 45.36
03-28 62.85
03-29 43.77
03-30 127.11
03-31 69.56
04-01 45.56
04-02 40.26
04-03 186.75
04-04 234.3
04-05 65.66
04-06 244.36
04-07 52.36
04-08 43.42
04-09 40.24
04-10 37.84
04-11 230.43
04-12 132.56
04-13 72.6
04-14 156.19
04-15 68.78
04-16 106.33
04-17 63.07
04-18 1255.75
04-19 1034.91
04-20 187.3
04-21 79.75
04-22 69.77
04-23 56.8
04-24 55.58
04-25 124.53
04-26 67.04
04-27 51.8
04-28 177.0
04-29 98.98
04-30 139.94
05-01 290.19
05-02 79.86
05-03 162.16
05-04 88.61
05-05 238.11
05-06 83.8
05-07 56.88
05-08 72.45
05-09 234.03
05-10 89.07
05-11 156.23
05-12 60.56
05-13 330.64
05-14 86.37
05-15 69.99
05-16 85.49
05-17 114.91
05-18 218.6
05-19 358.95
05-20 85.16
05-21 149.09
05-22 303.77
05-23 120.31
05-24 52.96
05-25 74.45
05-26 732.42
05-27 495.22
05-28 340.97
05-29 1058.39
05-30 401.13
05-31 68.92
06-01 51.16
06-02 42.2
06-03 157.88
06-04 180.38
06-05 606.02
06-06 57.8
06-07 46.83
06-08 487.77
06-09 150.37
06-10 61.71
06-11 131.67
06-12 473.56
06-13 65.43
06-14 48.55
06-15 83.3
06-16 74.26
06-17 71.05
06-18 38.49
06-19 23.13
06-20 149.09
06-21 98.36
06-22 126.38
06-23 244.29
06-24 75.98
06-25 535.97
06-26 974.21
06-27 218.1
06-28 218.68
06-29 82.19
06-30 165.48
07-01 46.45
07-02 39.31
07-03 26.23
07-04 20.94
07-05 16.5
07-06 98.09
07-07 48.17
07-08 44.73
07-09 36.67
07-10 19.1
07-11 664.37
07-12 68.86
07-13 24.44
07-14 36.63
07-15 121.59
07-16 74.96
07-17 222.84
07-18 35.5
07-19 27.21
07-20 109.35
07-21 378.24
07-22 47.06
07-23 28.87
07-24 24.42
07-25 23.15
07-26 75.64
07-27 253.4
07-28 159.6
07-29 728.81
07-30 12.35
07-31 93.9
08-01 86.58
08-02 73.86
08-03 79.01
08-04 67.79
08-05 61.3
08-06 67.96
08-07 105.83
08-08 125.9
08-09 36.81
08-10 58.15
08-11 44.44
08-12 67.9
08-13 50.85
08-14 42.53
08-15 38.4
08-16 37.4
08-17 426.01
08-18 31.57
08-19 17.36
08-20 9.17
08-21 12.04
08-22 8.87
08-23 23.33
08-24 340.94
08-25 35.36
08-26 20.83
08-27 16.99
08-28 18.16
08-29 88.27
08-30 167.77
08-31 57.8
09-01 15.3
09-02 46.94
09-03 65.84
09-04 19.72
09-05 8.39
09-06 329.1
09-07 47.05
09-08 24.24
09-09 40.17
09-10 284.04
09-11 153.07
09-12 26.81
09-13 15.95
09-14 11.19
09-15 7.33
09-16 87.2
09-17 13.52
09-18 10.34
09-19 14.95
09-20 11.57
09-21 8.45
09-22 5.92
09-23 15.14
09-24 6.75
09-25 5.08
09-26 5.48
09-27 4.16
09-28 53.53
09-29 222.22
09-30 457.67
10-01 36.75
10-02 17.33
10-03 287.56
10-04 35.52
10-05 17.97
10-06 16.73
10-07 69.87
10-08 109.0
10-09 349.66
10-10 251.54
10-11 90.96
10-12 28.01
10-13 20.63
10-14 326.72
10-15 134.2
10-16 29.09
10-17 19.22
10-18 15.3
10-19 13.95
10-20 12.82
10-21 12.71
10-22 15.26
10-23 13.78
10-24 14.4
10-25 23.31
10-26 18.32
10-27 13.19
10-28 12.41
10-29 109.46
10-30 30.79
10-31 16.1
11-01 11.92
11-02 10.31
11-03 8.33
11-04 7.97
11-05 12.68
11-06 13.95
11-07 9.43
11-08 8.15
11-09 7.7
11-10 7.48
11-11 291.45
11-12 98.1
11-13 40.68
11-14 36.12
11-15 33.37
11-16 29.42
11-17 31.64
11-18 8.97
11-19 9.01
11-20 9.57
11-21 16.69
11-22 16.96
11-23 16.46
11-24 17.97
11-25 93.07
11-26 57.75
11-27 261.24
11-28 15.73
11-29 29.96
11-30 89.19
12-01 217.95
12-02 374.61
12-03 96.58
12-04 45.4
12-05 35.2
12-06 30.82
12-07 24.02
12-08 22.32
12-09 21.72
12-10 18.02
12-11 17.41
12-12 17.8
12-13 16.51
12-14 11.63
12-15 23.4
12-16 17.7
12-17 33.74
12-18 26.75
12-19 23.27
12-20 12.63
12-21 12.51
12-22 109.89
12-23 46.75
12-24 299.12
12-25 59.01
12-26 39.29
12-27 40.17
12-28 131.76
12-29 50.98
12-30 84.07
12-31 46.39

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index