Maximum discharge along the river was observed at the Illinois River At Valley City with a streamflow rate of 10,400 cfs. However, the deepest point on the river is located at the Illinois River At Henry reporting a gauge stage of 14.9 ft. This river is monitored from 12 different streamgauging stations along the Illinois River, the highest being perched at an elevation of 1,202 ft, the Illinois River Near Kerby.
| Location | Streamflow | River Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Illinois River Near Kerby
USGS 14377100 |
665 cfs | 4.3 ft | -6.53 | |||||
|
Illinois River At Savoy
USGS 07194800 |
148 cfs | 3 ft | -41.02 | |||||
|
Illinois River At Hwy. 16 Near Siloam Springs Ar
USGS 07195400 |
519 cfs | 6.71 ft | -11.2 | |||||
|
Illinois River South Of Siloam Springs
USGS 07195430 |
505 cfs | 3.43 ft | -10.39 | |||||
|
Illinois River Near Watts
USGS 07195500 |
614 cfs | 3.76 ft | -11.72 | |||||
|
Illinois River At Chewey
USGS 07196090 |
691 cfs | 4.11 ft | -10.74 | |||||
|
Illinois River Near Tahlequah
USGS 07196500 |
1020 cfs | 5.87 ft | -11.9 | |||||
|
Illinois River Near Gore
USGS 07198000 |
71 cfs | 6.67 ft | 4.38 | |||||
|
Illinois River At Marseilles
USGS 05543500 |
7050 cfs | 12.11 ft | 24.44 | |||||
|
Illinois River At Kingston Mines
USGS 05568500 |
0 cfs | 4.12 ft | 79.05 | |||||
|
Illinois River At Henry
USGS 05558300 |
6200 cfs | 14.9 ft | 98.9 | |||||
|
Illinois River At Valley City
USGS 05586100 |
10400 cfs | 3.1 ft | -6.54 |
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