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

* WHAT...Peak heat index values between 100 to 105 expected. * WHERE...Portions of west central Illinois, east central and southeast Iowa, and northeast Missouri. * WHEN...From noon to 8 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...A round of scattered showers and thunderstorms is possible Monday morning into the early afternoon, mainly for counties along and north of I-80. The rain and lingering cloud cover could hold peak heat indices lower than currently forecast for areas north of I-80.

North Skunk River Near Sigourney, 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
01-01 721.0
01-02 633.0
01-03 728.25
01-04 680.0
01-05 516.6
01-06 491.8
01-07 476.2
01-08 877.25
01-09 1146.25
01-10 914.0
01-11 635.0
01-12 551.0
01-13 649.5
01-14 615.25
01-15 622.0
01-16 629.0
01-17 574.75
01-18 375.42
01-19 400.76
01-20 695.33
01-21 791.0
01-22 884.5
01-23 823.0
01-24 775.5
01-25 703.5
01-26 459.0
01-27 599.0
01-28 679.0
01-29 651.0
01-30 633.0
01-31 624.0
02-01 681.5
02-02 890.5
02-03 1082.0
02-04 1045.5
02-05 526.0
02-06 439.33
02-07 385.0
02-08 536.5
02-09 733.5
02-10 656.0
02-11 557.0
02-12 565.0
02-13 380.0
02-14 367.0
02-15 336.33
02-16 308.67
02-17 310.33
02-18 366.0
02-19 186.5
02-20 787.67
02-21 1091.33
02-22 685.0
02-23 476.67
02-24 562.5
02-25 503.0
02-26 396.67
02-27 359.0
02-28 346.0
02-29 413.0
03-01 374.33
03-02 386.67
03-03 326.5
03-04 348.4
03-05 323.6
03-06 279.33
03-07 255.6
03-08 277.24
03-09 380.0
03-10 763.21
03-11 1019.5
03-12 905.41
03-13 1187.16
03-14 1025.6
03-15 589.17
03-16 434.95
03-17 447.65
03-18 389.97
03-19 337.03
03-20 596.22
03-21 650.12
03-22 368.15
03-23 489.03
03-24 483.32
03-25 461.87
03-26 445.37
03-27 437.95
03-28 497.56
03-29 513.67
03-30 447.53
03-31 448.5
04-01 520.64
04-02 447.5
04-03 482.71
04-04 465.33
04-05 581.4
04-06 688.73
04-07 607.27
04-08 497.0
04-09 437.57
04-10 419.0
04-11 598.47
04-12 776.71
04-13 593.64
04-14 510.5
04-15 705.15
04-16 964.31
04-17 887.46
04-18 1115.38
04-19 1436.69
04-20 1411.31
04-21 1058.5
04-22 931.36
04-23 916.43
04-24 782.86
04-25 686.85
04-26 624.5
04-27 601.86
04-28 531.0
04-29 510.07
04-30 687.21
05-01 722.4
05-02 577.21
05-03 569.07
05-04 630.29
05-05 1047.47
05-06 857.53
05-07 758.33
05-08 643.0
05-09 538.87
05-10 645.86
05-11 576.4
05-12 581.33
05-13 570.13
05-14 540.29
05-15 617.79
05-16 577.43
05-17 550.86
05-18 923.47
05-19 989.93
05-20 1572.71
05-21 1255.5
05-22 1228.64
05-23 1005.27
05-24 927.27
05-25 940.0
05-26 949.73
05-27 1522.93
05-28 1562.87
05-29 2485.07
05-30 2053.8
05-31 1749.53
06-01 1464.6
06-02 1201.47
06-03 945.6
06-04 834.93
06-05 640.07
06-06 572.64
06-07 656.0
06-08 578.13
06-09 825.53
06-10 724.0
06-11 984.47
06-12 958.14
06-13 1170.64
06-14 594.69
06-15 694.79
06-16 915.0
06-17 1155.27
06-18 971.2
06-19 761.0
06-20 627.5
06-21 1150.79
06-22 1180.71
06-23 1195.71
06-24 1235.07
06-25 1262.5
06-26 1257.86
06-27 1218.29
06-28 1474.64
06-29 1461.71
06-30 1369.29
07-01 1299.57
07-02 1332.79
07-03 1611.0
07-04 1457.43
07-05 1290.8
07-06 1108.8
07-07 832.46
07-08 737.23
07-09 729.57
07-10 522.47
07-11 519.93
07-12 502.87
07-13 628.64
07-14 634.4
07-15 515.47
07-16 427.54
07-17 500.53
07-18 417.93
07-19 322.55
07-20 368.98
07-21 326.1
07-22 511.15
07-23 523.54
07-24 433.46
07-25 418.37
07-26 534.84
07-27 442.31
07-28 363.16
07-29 420.76
07-30 683.17
07-31 626.3
08-01 564.15
08-02 465.56
08-03 452.3
08-04 352.75
08-05 268.24
08-06 206.34
08-07 198.61
08-08 175.38
08-09 211.85
08-10 163.96
08-11 368.66
08-12 460.41
08-13 394.1
08-14 301.44
08-15 234.23
08-16 198.48
08-17 175.65
08-18 124.84
08-19 110.88
08-20 142.65
08-21 122.83
08-22 186.39
08-23 165.99
08-24 148.62
08-25 133.25
08-26 158.22
08-27 130.84
08-28 165.35
08-29 132.71
08-30 150.54
08-31 178.28
09-01 163.04
09-02 428.0
09-03 523.84
09-04 430.29
09-05 388.44
09-06 646.19
09-07 1003.61
09-08 1107.37
09-09 759.85
09-10 683.65
09-11 785.57
09-12 555.95
09-13 596.41
09-14 476.52
09-15 238.94
09-16 204.56
09-17 179.64
09-18 247.72
09-19 341.65
09-20 404.99
09-21 341.84
09-22 174.33
09-23 223.28
09-24 215.06
09-25 195.55
09-26 175.64
09-27 196.14
09-28 197.96
09-29 174.09
09-30 197.17
10-01 171.91
10-02 127.7
10-03 287.58
10-04 346.42
10-05 394.22
10-06 386.95
10-07 812.26
10-08 611.59
10-09 715.24
10-10 697.85
10-11 712.34
10-12 819.64
10-13 822.55
10-14 662.76
10-15 893.97
10-16 423.62
10-17 517.38
10-18 399.61
10-19 303.64
10-20 251.43
10-21 181.43
10-22 211.72
10-23 236.09
10-24 227.62
10-25 305.49
10-26 354.61
10-27 250.29
10-28 248.61
10-29 276.94
10-30 310.56
10-31 255.67
11-01 229.16
11-02 176.51
11-03 203.36
11-04 196.39
11-05 315.39
11-06 284.08
11-07 247.0
11-08 228.38
11-09 203.25
11-10 190.2
11-11 189.08
11-12 259.4
11-13 280.65
11-14 228.91
11-15 200.79
11-16 189.74
11-17 182.41
11-18 153.03
11-19 146.78
11-20 256.31
11-21 182.85
11-22 142.57
11-23 183.6
11-24 196.65
11-25 222.57
11-26 265.66
11-27 461.11
11-28 172.25
11-29 460.71
11-30 466.64
12-01 366.73
12-02 524.97
12-03 445.96
12-04 359.16
12-05 326.78
12-06 312.1
12-07 279.32
12-08 267.52
12-09 263.48
12-10 255.49
12-11 245.6
12-12 244.51
12-13 211.05
12-14 173.19
12-15 165.67
12-16 205.7
12-17 1020.23
12-18 917.42
12-19 967.71
12-20 226.5
12-21 219.83
12-22 586.17
12-23 538.17
12-24 600.17
12-25 790.5
12-26 801.83
12-27 604.67
12-28 762.33
12-29 654.4
12-30 781.67
12-31 755.4

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index