Overview Realtime Historical Map View
Flood Watch
2026-08-06T13:00:00-05:00

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Calhoun IL, Greene IL, Jersey IL, Madison IL, Monroe IL, Pike IL and Saint Clair IL and Missouri, including the following areas, Franklin MO, Jefferson MO, Lincoln MO, Pike MO, Saint Charles MO, Saint Louis City MO, Saint Louis MO, Warren MO and Washington MO. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Widespread showers and thunderstorms may yield isolated instances of flash flooding through early this afternoon.

Big River Near Richwoods, Mo Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 941.0
01-02 770.25
01-03 748.67
01-04 838.75
01-05 665.0
01-06 549.92
01-07 476.25
01-08 429.42
01-09 393.5
01-10 395.42
01-11 1957.67
01-12 2518.5
01-13 1071.0
01-14 1437.25
01-15 767.83
01-16 683.75
01-17 571.54
01-18 642.42
01-19 1337.82
01-20 954.26
01-21 613.94
01-22 509.08
01-23 488.97
01-24 843.93
01-25 656.77
01-26 1279.5
01-27 972.0
01-28 675.23
01-29 672.77
01-30 768.36
01-31 1477.43
02-01 911.86
02-02 618.5
02-03 534.07
02-04 500.43
02-05 502.0
02-06 500.08
02-07 751.0
02-08 1165.54
02-09 604.36
02-10 754.21
02-11 749.46
02-12 1072.14
02-13 999.36
02-14 752.43
02-15 601.71
02-16 620.71
02-17 704.77
02-18 2052.54
02-19 1302.15
02-20 650.62
02-21 1105.62
02-22 1023.38
02-23 837.85
02-24 813.23
02-25 765.58
02-26 735.83
02-27 1449.64
02-28 922.07
02-29 533.25
03-01 864.93
03-02 733.43
03-03 733.21
03-04 1771.64
03-05 1584.07
03-06 2425.57
03-07 1021.93
03-08 2266.86
03-09 1099.57
03-10 911.86
03-11 1204.0
03-12 1764.79
03-13 1874.29
03-14 1375.86
03-15 1827.43
03-16 1111.86
03-17 991.64
03-18 2127.57
03-19 3443.0
03-20 1644.86
03-21 1391.93
03-22 718.71
03-23 743.47
03-24 832.8
03-25 2059.6
03-26 2238.73
03-27 1358.4
03-28 1456.8
03-29 1280.0
03-30 1617.93
03-31 2705.21
04-01 2113.2
04-02 1014.0
04-03 905.8
04-04 1319.67
04-05 1898.4
04-06 3214.93
04-07 1856.27
04-08 1603.67
04-09 1942.57
04-10 1380.53
04-11 935.73
04-12 1280.0
04-13 984.71
04-14 1388.36
04-15 2003.0
04-16 1112.31
04-17 1186.31
04-18 888.0
04-19 3189.77
04-20 3609.77
04-21 1336.71
04-22 1282.43
04-23 881.79
04-24 1098.5
04-25 1654.15
04-26 1978.93
04-27 1472.57
04-28 1606.64
04-29 1507.36
04-30 6849.5
05-01 6051.4
05-02 1439.21
05-03 1698.86
05-04 2939.93
05-05 4378.29
05-06 2196.53
05-07 1707.2
05-08 1172.64
05-09 1073.0
05-10 1035.33
05-11 869.93
05-12 1708.87
05-13 2657.07
05-14 994.62
05-15 892.69
05-16 800.54
05-17 732.92
05-18 1507.86
05-19 1113.0
05-20 823.0
05-21 852.73
05-22 1577.87
05-23 1371.47
05-24 735.2
05-25 767.87
05-26 946.0
05-27 966.47
05-28 1461.27
05-29 1219.47
05-30 747.07
05-31 634.47
06-01 1473.4
06-02 1792.87
06-03 903.93
06-04 630.27
06-05 734.0
06-06 727.36
06-07 742.21
06-08 603.6
06-09 697.93
06-10 588.07
06-11 536.87
06-12 430.79
06-13 393.36
06-14 366.93
06-15 390.8
06-16 344.53
06-17 1100.13
06-18 1200.27
06-19 663.0
06-20 1841.29
06-21 1576.29
06-22 494.07
06-23 667.21
06-24 665.71
06-25 539.14
06-26 410.36
06-27 795.76
06-28 629.83
06-29 535.54
06-30 511.49
07-01 388.25
07-02 538.81
07-03 722.38
07-04 375.16
07-05 459.66
07-06 399.54
07-07 297.43
07-08 389.15
07-09 528.15
07-10 442.93
07-11 621.38
07-12 245.15
07-13 327.85
07-14 414.43
07-15 418.87
07-16 392.93
07-17 576.07
07-18 413.27
07-19 647.13
07-20 407.2
07-21 522.8
07-22 322.87
07-23 361.47
07-24 278.73
07-25 252.54
07-26 219.6
07-27 215.47
07-28 204.6
07-29 314.4
07-30 328.33
07-31 323.0
08-01 299.62
08-02 371.53
08-03 423.8
08-04 1347.47
08-05 1003.73
08-06 637.47
08-07 321.57
08-08 279.28
08-09 279.87
08-10 364.62
08-11 1027.93
08-12 440.14
08-13 323.21
08-14 333.21
08-15 825.57
08-16 1792.46
08-17 959.08
08-18 419.5
08-19 320.62
08-20 272.08
08-21 247.62
08-22 323.67
08-23 258.64
08-24 249.38
08-25 215.77
08-26 226.5
08-27 202.69
08-28 205.03
08-29 189.02
08-30 193.74
08-31 199.71
09-01 251.44
09-02 250.79
09-03 213.01
09-04 197.11
09-05 316.85
09-06 271.34
09-07 222.92
09-08 258.81
09-09 975.49
09-10 566.91
09-11 301.84
09-12 235.48
09-13 203.19
09-14 179.63
09-15 170.36
09-16 170.36
09-17 517.44
09-18 509.46
09-19 241.53
09-20 198.46
09-21 174.83
09-22 164.77
09-23 165.36
09-24 156.79
09-25 148.15
09-26 144.16
09-27 145.72
09-28 151.78
09-29 150.72
09-30 152.48
10-01 141.92
10-02 137.48
10-03 135.17
10-04 137.39
10-05 163.31
10-06 143.58
10-07 152.09
10-08 160.81
10-09 151.74
10-10 163.09
10-11 167.38
10-12 209.64
10-13 187.43
10-14 251.36
10-15 208.38
10-16 217.46
10-17 198.64
10-18 182.86
10-19 194.5
10-20 210.14
10-21 272.31
10-22 241.29
10-23 198.79
10-24 181.5
10-25 177.29
10-26 196.21
10-27 211.14
10-28 219.79
10-29 215.64
10-30 292.14
10-31 315.86
11-01 269.57
11-02 326.62
11-03 350.79
11-04 276.0
11-05 258.77
11-06 358.58
11-07 375.69
11-08 293.15
11-09 254.92
11-10 240.92
11-11 224.31
11-12 214.85
11-13 268.38
11-14 269.36
11-15 289.31
11-16 292.29
11-17 261.79
11-18 238.38
11-19 222.0
11-20 214.38
11-21 275.29
11-22 354.85
11-23 931.14
11-24 433.0
11-25 364.62
11-26 414.93
11-27 338.5
11-28 346.15
11-29 554.07
11-30 450.21
12-01 723.79
12-02 521.71
12-03 414.79
12-04 344.79
12-05 339.86
12-06 562.85
12-07 605.21
12-08 380.79
12-09 312.71
12-10 283.79
12-11 264.64
12-12 264.79
12-13 266.64
12-14 267.15
12-15 371.38
12-16 1485.23
12-17 628.92
12-18 467.0
12-19 872.23
12-20 482.92
12-21 430.08
12-22 455.15
12-23 572.69
12-24 971.67
12-25 738.17
12-26 459.92
12-27 1083.5
12-28 2389.33
12-29 479.0
12-30 2592.08
12-31 789.08

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index