Overview Realtime Historical Map View
Heat Advisory
2026-07-21T19:00:00-05:00

* WHAT...Heat index values 100 to 105 expected. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...From noon Saturday to 7 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Gasconade River Near Rich Fountain, 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 7601.25
01-02 4348.91
01-03 3222.5
01-04 3295.42
01-05 3200.08
01-06 2658.7
01-07 2882.18
01-08 2575.09
01-09 2284.17
01-10 2131.0
01-11 4002.92
01-12 4074.17
01-13 4840.33
01-14 6149.58
01-15 5574.42
01-16 3196.33
01-17 2629.69
01-18 3410.83
01-19 3143.54
01-20 3208.77
01-21 3056.69
01-22 2545.85
01-23 2352.92
01-24 2323.92
01-25 2236.15
01-26 2984.5
01-27 3495.25
01-28 3837.85
01-29 3562.38
01-30 2962.21
01-31 3230.64
02-01 3226.0
02-02 3291.64
02-03 3096.71
02-04 2687.07
02-05 2545.36
02-06 2260.69
02-07 2784.62
02-08 2778.85
02-09 3042.14
02-10 3310.43
02-11 3513.31
02-12 2990.21
02-13 2951.57
02-14 3242.57
02-15 3389.36
02-16 3164.33
02-17 2480.42
02-18 2889.08
02-19 4365.23
02-20 4486.79
02-21 4022.21
02-22 3096.64
02-23 3221.0
02-24 3116.14
02-25 2762.08
02-26 2779.15
02-27 6470.5
02-28 6199.93
02-29 2838.0
03-01 4047.64
03-02 3420.71
03-03 3001.71
03-04 3990.14
03-05 4513.93
03-06 5508.21
03-07 5490.14
03-08 4411.64
03-09 4727.36
03-10 5087.71
03-11 4729.0
03-12 4394.29
03-13 5255.0
03-14 6552.14
03-15 7873.57
03-16 8462.86
03-17 8282.86
03-18 6425.71
03-19 5924.67
03-20 6557.86
03-21 6196.0
03-22 4226.43
03-23 7212.0
03-24 6848.0
03-25 8440.0
03-26 9174.67
03-27 9116.67
03-28 9650.0
03-29 7519.33
03-30 7363.33
03-31 8022.86
04-01 6908.0
04-02 6910.67
04-03 5654.0
04-04 5289.33
04-05 6233.33
04-06 6219.33
04-07 6838.0
04-08 6886.0
04-09 5975.0
04-10 4235.33
04-11 4012.67
04-12 4119.29
04-13 4422.14
04-14 4573.57
04-15 5774.62
04-16 6053.08
04-17 5586.92
04-18 4532.31
04-19 5005.38
04-20 5971.54
04-21 6831.43
04-22 6220.0
04-23 5416.43
04-24 5705.0
04-25 5974.62
04-26 5659.29
04-27 6007.86
04-28 6607.86
04-29 6762.14
04-30 7136.15
05-01 14836.67
05-02 8430.71
05-03 8060.71
05-04 11330.67
05-05 10318.67
05-06 10473.33
05-07 11063.47
05-08 8469.43
05-09 7977.33
05-10 6569.29
05-11 4773.33
05-12 4306.67
05-13 4159.33
05-14 4599.29
05-15 4394.29
05-16 4363.57
05-17 4479.07
05-18 5551.53
05-19 6210.4
05-20 7214.43
05-21 7265.73
05-22 7346.2
05-23 8231.13
05-24 7417.6
05-25 6808.73
05-26 5756.87
05-27 5641.73
05-28 6195.53
05-29 5783.87
05-30 5536.67
05-31 5553.33
06-01 6932.67
06-02 5777.33
06-03 5249.47
06-04 5237.73
06-05 5740.43
06-06 5123.36
06-07 5329.0
06-08 4501.07
06-09 4312.07
06-10 4703.87
06-11 4239.73
06-12 3920.07
06-13 3391.36
06-14 2809.93
06-15 2645.4
06-16 3112.93
06-17 3989.07
06-18 3938.47
06-19 4290.71
06-20 4358.79
06-21 3955.36
06-22 4506.86
06-23 5554.64
06-24 3449.43
06-25 2522.71
06-26 2723.64
06-27 2433.0
06-28 2220.43
06-29 2220.57
06-30 2838.43
07-01 2263.43
07-02 3115.36
07-03 3351.86
07-04 3850.71
07-05 3827.0
07-06 3488.6
07-07 2196.93
07-08 2056.5
07-09 3223.64
07-10 3638.87
07-11 3916.47
07-12 1467.93
07-13 4224.86
07-14 4248.27
07-15 2458.33
07-16 1782.73
07-17 2134.07
07-18 1955.36
07-19 1840.21
07-20 1705.79
07-21 1758.57
07-22 1594.57
07-23 1512.79
07-24 1643.93
07-25 1540.64
07-26 1410.21
07-27 1352.29
07-28 1310.36
07-29 1277.36
07-30 1106.77
07-31 1327.57
08-01 1198.25
08-02 1182.23
08-03 1577.21
08-04 1384.21
08-05 1428.5
08-06 3028.43
08-07 3138.36
08-08 7883.69
08-09 11212.15
08-10 8286.62
08-11 6626.43
08-12 5107.71
08-13 4042.07
08-14 2597.57
08-15 2139.86
08-16 1719.46
08-17 1619.0
08-18 1459.42
08-19 1590.08
08-20 1418.92
08-21 1363.23
08-22 1265.58
08-23 1344.29
08-24 1285.85
08-25 1226.31
08-26 1477.29
08-27 1396.86
08-28 1499.5
08-29 1395.64
08-30 1480.36
08-31 1202.62
09-01 1354.79
09-02 1325.21
09-03 1192.86
09-04 1144.77
09-05 1080.31
09-06 1121.57
09-07 1033.0
09-08 1079.64
09-09 1244.29
09-10 1501.21
09-11 978.29
09-12 1045.71
09-13 952.29
09-14 888.43
09-15 909.79
09-16 839.36
09-17 1045.71
09-18 1136.07
09-19 1072.21
09-20 979.29
09-21 912.07
09-22 918.62
09-23 911.21
09-24 876.14
09-25 854.14
09-26 845.21
09-27 815.07
09-28 797.57
09-29 789.43
09-30 768.77
10-01 784.67
10-02 771.92
10-03 787.62
10-04 760.69
10-05 756.64
10-06 746.93
10-07 754.64
10-08 766.07
10-09 769.79
10-10 871.5
10-11 913.57
10-12 846.86
10-13 852.86
10-14 908.57
10-15 963.46
10-16 887.54
10-17 933.21
10-18 908.71
10-19 937.21
10-20 931.85
10-21 948.69
10-22 932.64
10-23 1066.86
10-24 967.57
10-25 932.79
10-26 929.29
10-27 933.43
10-28 948.29
10-29 1014.71
10-30 1232.43
10-31 1295.93
11-01 1550.29
11-02 1649.92
11-03 1468.71
11-04 1401.43
11-05 1441.86
11-06 1413.62
11-07 1355.77
11-08 1373.08
11-09 1450.83
11-10 1297.54
11-11 1217.46
11-12 1161.31
11-13 1109.77
11-14 1195.0
11-15 1185.86
11-16 1247.79
11-17 1229.36
11-18 1179.23
11-19 1154.92
11-20 1092.77
11-21 2417.93
11-22 1688.31
11-23 1996.77
11-24 2413.38
11-25 2409.77
11-26 1953.71
11-27 1753.29
11-28 1529.31
11-29 1959.0
11-30 2538.79
12-01 2640.57
12-02 2572.29
12-03 2603.79
12-04 2476.43
12-05 2163.79
12-06 2149.0
12-07 1729.86
12-08 1553.57
12-09 1463.07
12-10 1403.71
12-11 1334.21
12-12 1324.71
12-13 1304.57
12-14 1395.15
12-15 1393.0
12-16 1476.77
12-17 2667.62
12-18 2496.46
12-19 3322.0
12-20 2177.08
12-21 2482.08
12-22 2310.62
12-23 2200.46
12-24 2455.46
12-25 2527.85
12-26 2224.38
12-27 4736.91
12-28 7178.36
12-29 1994.1
12-30 12183.42
12-31 11441.58

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index