Overview Realtime Historical Map View
Heat Advisory
2026-09-06T19:00:00-05:00

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 106. For the Heat Advisory, heat index values up to 101 expected. * WHERE...Boone MO, Callaway MO, Cole MO, Moniteau MO, Osage MO, Crawford MO, Gasconade MO, and Reynolds MO Counties. * WHEN...For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 8 PM this evening to 7 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

Meramec River Near Sullivan, 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 1389.17
01-02 1435.09
01-03 1262.42
01-04 1258.0
01-05 1212.33
01-06 1155.0
01-07 1046.64
01-08 955.09
01-09 887.18
01-10 849.42
01-11 1583.17
01-12 3125.83
01-13 2769.83
01-14 1754.5
01-15 1406.08
01-16 1230.67
01-17 1056.85
01-18 1188.42
01-19 1965.83
01-20 1598.33
01-21 1237.17
01-22 1087.92
01-23 978.5
01-24 1045.38
01-25 1074.54
01-26 2112.0
01-27 1923.0
01-28 1301.08
01-29 1236.0
01-30 1307.29
01-31 1991.36
02-01 1718.41
02-02 1292.14
02-03 1113.57
02-04 1018.5
02-05 983.21
02-06 958.77
02-07 1043.58
02-08 1466.23
02-09 1261.0
02-10 1116.85
02-11 1190.17
02-12 1228.38
02-13 1492.0
02-14 1358.92
02-15 1167.77
02-16 1108.54
02-17 1091.08
02-18 2275.5
02-19 2536.33
02-20 1307.85
02-21 1245.62
02-22 1434.31
02-23 1277.0
02-24 1188.08
02-25 1162.42
02-26 1215.31
02-27 2041.5
02-28 1747.07
02-29 1086.0
03-01 1379.0
03-02 1262.5
03-03 1461.69
03-04 2518.77
03-05 2615.07
03-06 3473.64
03-07 2890.79
03-08 2942.57
03-09 2625.93
03-10 1856.5
03-11 2033.71
03-12 2487.29
03-13 2946.57
03-14 2933.64
03-15 2766.0
03-16 2930.21
03-17 2743.93
03-18 3139.79
03-19 3864.27
03-20 3104.0
03-21 2584.53
03-22 1539.0
03-23 1636.2
03-24 1820.0
03-25 3439.73
03-26 4146.67
03-27 2981.67
03-28 2914.2
03-29 2799.07
03-30 2452.2
03-31 3257.71
04-01 3305.67
04-02 2192.53
04-03 1904.0
04-04 2106.47
04-05 2853.27
04-06 4631.87
04-07 4007.33
04-08 2267.87
04-09 2152.5
04-10 1809.27
04-11 1780.53
04-12 2184.64
04-13 2069.21
04-14 2397.14
04-15 3097.54
04-16 2264.77
04-17 2210.0
04-18 1895.15
04-19 2685.77
04-20 4231.77
04-21 3062.43
04-22 2426.57
04-23 1834.43
04-24 1857.57
04-25 2611.54
04-26 2740.29
04-27 2599.07
04-28 3100.14
04-29 2842.0
04-30 8024.29
05-01 3054.0
05-02 3507.14
05-03 3034.07
05-04 3418.64
05-05 3695.79
05-06 3337.14
05-07 3259.79
05-08 2315.93
05-09 1930.71
05-10 1937.86
05-11 2085.29
05-12 1915.0
05-13 2181.0
05-14 1936.0
05-15 1764.31
05-16 1637.92
05-17 1571.08
05-18 2220.79
05-19 2869.93
05-20 2010.77
05-21 2830.29
05-22 3134.67
05-23 2617.86
05-24 1878.13
05-25 1719.0
05-26 2056.47
05-27 2284.07
05-28 2406.87
05-29 2183.67
05-30 1674.93
05-31 1533.6
06-01 1800.93
06-02 2028.87
06-03 1668.73
06-04 1371.53
06-05 2152.29
06-06 1662.79
06-07 1932.29
06-08 1381.8
06-09 1219.13
06-10 1262.73
06-11 1174.93
06-12 1104.86
06-13 1005.0
06-14 1005.86
06-15 1084.8
06-16 980.87
06-17 1166.87
06-18 1114.0
06-19 1268.29
06-20 2515.93
06-21 2123.71
06-22 1131.0
06-23 1050.29
06-24 982.36
06-25 996.29
06-26 921.36
06-27 937.07
06-28 1070.93
06-29 933.5
06-30 1353.14
07-01 2826.86
07-02 1206.43
07-03 992.43
07-04 1123.57
07-05 903.33
07-06 850.27
07-07 763.57
07-08 753.14
07-09 829.71
07-10 944.6
07-11 3579.6
07-12 2079.29
07-13 1057.71
07-14 903.53
07-15 837.8
07-16 787.0
07-17 1043.73
07-18 871.07
07-19 1033.53
07-20 903.73
07-21 891.87
07-22 806.8
07-23 736.0
07-24 675.73
07-25 656.67
07-26 620.27
07-27 630.4
07-28 662.47
07-29 636.13
07-30 629.27
07-31 616.47
08-01 791.92
08-02 830.87
08-03 932.87
08-04 774.4
08-05 868.4
08-06 820.73
08-07 935.87
08-08 1090.36
08-09 1590.57
08-10 1343.14
08-11 1570.2
08-12 1227.8
08-13 916.0
08-14 757.07
08-15 1150.4
08-16 894.5
08-17 803.36
08-18 720.08
08-19 612.79
08-20 594.79
08-21 577.21
08-22 568.46
08-23 584.0
08-24 575.07
08-25 532.57
08-26 500.8
08-27 477.73
08-28 565.53
08-29 503.6
08-30 485.87
08-31 476.79
09-01 535.93
09-02 509.13
09-03 482.67
09-04 452.13
09-05 553.07
09-06 544.0
09-07 474.07
09-08 542.57
09-09 863.0
09-10 656.79
09-11 556.64
09-12 497.07
09-13 457.71
09-14 434.64
09-15 427.43
09-16 416.43
09-17 479.21
09-18 486.64
09-19 484.5
09-20 454.64
09-21 427.86
09-22 419.62
09-23 413.0
09-24 407.5
09-25 395.29
09-26 388.86
09-27 385.79
09-28 377.43
09-29 382.14
09-30 373.38
10-01 367.0
10-02 362.38
10-03 362.31
10-04 366.46
10-05 365.0
10-06 366.0
10-07 363.29
10-08 403.0
10-09 396.79
10-10 413.86
10-11 398.07
10-12 423.5
10-13 421.07
10-14 404.86
10-15 416.92
10-16 451.62
10-17 447.0
10-18 428.93
10-19 440.29
10-20 457.71
10-21 462.23
10-22 470.43
10-23 446.93
10-24 426.64
10-25 416.43
10-26 420.93
10-27 442.71
10-28 448.0
10-29 458.0
10-30 504.71
10-31 550.36
11-01 536.36
11-02 520.0
11-03 539.07
11-04 532.71
11-05 509.36
11-06 528.0
11-07 583.46
11-08 587.85
11-09 556.69
11-10 537.85
11-11 509.92
11-12 493.08
11-13 471.54
11-14 486.71
11-15 573.14
11-16 531.21
11-17 521.5
11-18 485.62
11-19 468.38
11-20 456.31
11-21 640.21
11-22 1030.62
11-23 1434.64
11-24 1051.85
11-25 825.08
11-26 755.29
11-27 707.93
11-28 621.46
11-29 913.07
11-30 836.43
12-01 1069.69
12-02 995.46
12-03 881.15
12-04 783.62
12-05 741.38
12-06 830.75
12-07 788.31
12-08 718.57
12-09 649.86
12-10 604.21
12-11 552.64
12-12 534.21
12-13 531.07
12-14 536.62
12-15 590.08
12-16 1145.62
12-17 1208.46
12-18 945.46
12-19 1009.69
12-20 826.5
12-21 742.83
12-22 776.46
12-23 830.0
12-24 825.38
12-25 928.85
12-26 812.08
12-27 1670.58
12-28 3381.17
12-29 752.36
12-30 4813.92
12-31 1978.67

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index