Overview Realtime Historical Map View
Extreme Heat Warning
2026-08-13T20:00:00-05:00

* WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Judys Branch At Rte 157 At Glen Carbon, Il Historical Data

Historical Data


Streamflow Range


Date Average 2011
05-01 12.0
05-02 30.0
05-03 11.0
05-04 8.8
05-05 7.9
05-06 20.0
05-07 7.5
05-08 7.9
05-09 6.7
05-10 6.4
05-11 6.7
05-12 5.7
05-13 5.4
05-14 5.7
05-15 10.0
05-16 9.2
05-17 6.0
05-18 5.4
05-19 5.1
05-20 5.1
05-21 4.8
05-22 4.3
05-23 12.0
05-24 6.7
05-25 4.5
05-26 32.0
05-27 9.7
05-28 7.1
05-29 7.1
05-30 4.8
05-31 4.0
06-01 3.8
06-02 3.3
06-03 3.3
06-04 3.1
06-05 2.7
06-06 2.7
06-07 2.6
06-08 2.6
06-09 2.6
06-10 2.4
06-11 28.0
06-12 4.3
06-13 3.1
06-14 2.9
06-15 14.0
06-16 5.7
06-17 4.0
06-18 11.0
06-19 22.0
06-20 14.0
06-21 8.3
06-22 7.1
06-23 5.7
06-24 5.1
06-25 4.3
06-26 779.0
06-27 15.0
06-28 17.0
06-29 9.7
06-30 6.7
07-01 5.1
07-02 4.3
07-03 3.5
07-04 14.0
07-05 12.0
07-06 4.0
07-07 3.3
07-08 22.0
07-09 3.3
07-10 2.7
07-11 2.6
07-12 2.2
07-13 2.6
07-14 2.6
07-15 2.2
07-16 2.1
07-17 1.9
07-18 1.8
07-19 1.8
07-20 1.7
07-21 1.6
07-22 1.4
07-23 1.3
07-24 1.3
07-25 1.3
07-26 1.4
07-27 1.3
07-28 1.2
07-29 1.1
07-30 1.7
07-31 2.1
08-01 1.1
08-02 0.97
08-03 0.89
08-04 0.89
08-05 1.2
08-06 1.2
08-07 1.3
08-08 0.89
08-09 0.82
08-10 0.82
08-11 0.89
08-12 0.75
08-13 1.1
08-14 0.89
08-15 0.75
08-16 0.75
08-17 0.75
08-18 0.75
08-19 0.75
08-20 0.89
08-21 0.97
08-22 0.89
08-23 0.75
08-24 0.53
08-25 0.44
08-26 0.3
08-27 0.25
08-28 0.25
08-29 0.25
08-30 0.2
08-31 0.2
09-01 0.25
09-02 0.13
09-03 0.09
09-04 0.07
09-05 0.25
09-06 0.11
09-07 0.06
09-08 0.03
09-09 0.03
09-10 0.2
09-11 0.25
09-12 0.2
09-13 0.17
09-14 0.13
09-15 5.4
09-16 0.25
09-17 0.13
09-18 0.13
09-19 7.9
09-20 0.89
09-21 0.3
09-22 0.2
09-23 0.53
09-24 0.36
09-25 0.3
09-26 0.2
09-27 0.2
09-28 0.25
09-29 0.25
09-30 0.17

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index