Overview Realtime Historical Map View
Heat Advisory
2026-09-02T19:00:00-05:00

* WHAT...Heat index values up to 100-103 degrees. * WHERE...Portions of central and south central Iowa, including the Des Moines metro. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...While heat index values may not reach 105 degrees each day, the combination of the longevity of the heat and little or limited relief during the overnight periods with warm lows have prompted the multi-day Heat Advisory.

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
07-20 102.24
07-21 353.69
07-22 46.37
07-23 27.66
07-24 23.16
07-25 21.9
07-26 71.0
07-27 236.88
07-28 149.19
07-29 680.45
07-30 11.68
07-31 87.84
08-01 80.31
08-02 69.13
08-03 73.77
08-04 63.23
08-05 57.71
08-06 164.77
08-07 108.44
08-08 121.28
08-09 36.92
08-10 56.01
08-11 42.89
08-12 64.53
08-13 48.37
08-14 40.67
08-15 37.46
08-16 41.23
08-17 398.39
08-18 31.32
08-19 17.59
08-20 10.72
08-21 13.2
08-22 9.38
08-23 22.48
08-24 317.21
08-25 33.37
08-26 19.91
08-27 16.26
08-28 17.24
08-29 82.65
08-30 156.88
08-31 54.03
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