Extreme Heat Warning
2026-09-05T19:00:00-05:00

* WHAT...Dangerously hot conditions with heat index values up to 110. * WHERE...Portions of central, east central, southeast, and west central Illinois. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Realtime Data

Illinois

Spoon River

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Extreme Heat Warning
Until 2026-09-05T19:00:00-05:00 • National Weather Service
* WHAT...Dangerously hot conditions with heat index values up to 110. * WHERE...Portions of central, east central, southeast, and west central Illinois. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

SPOON RIVER AT SEVILLE, IL

Realtime Data • Report • Conditions

420

Discharge (cfs)

6.4

Gauge Height (ft)

USGS 05570000

Streamflow discharge was last observed at 420 cfs, and a gauge height of 6.42 feet. With the % decrease since yesterday, the streamflow average over the past 10 days is 709 .

Weather today, Tomorrow,

The river is not influenced by any major tributaries or dams in the area. Seasonal trends show higher flow in the spring due to snowmelt and rainfall, and lower flow in the summer and fall. Additionally, the Spoon River has a history of flooding, with the highest recorded flood occurring in 1943. A unique fact about the hydrology of the Spoon River is that it is known for its extensive mussel beds, which provide habitat for a variety of aquatic species.

September 5, 2026

Elevation	498.0 ft
Last Updated
Gage height, ft	6.42 ft
Streamflow, ft³/s	420.0 ft3/s
Temperature, air, °C	28.8 deg C
Temperature, water, degC	11.6 deg C
Lower 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter	26.0 mg/l
Upper 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter	114.0 mg/l
Suspended sediment concentration, water, unfiltered, estimated by regression equation, mg/L	54.0 mg/l
Sediment corrected acoustic backscatter (SCB), decibels	79.5 dB
Percent of Normal	236%
Year Over Year Average	178 cfs
24hr Flow Prediction	cfs
Maximum Recorded	40,100 cfs

SNOFLO^®

Spoon River At Seville, Il Realtime Data

SPOON RIVER AT SEVILLE, IL

Realtime Data • Report • Conditions

420

Discharge (cfs)

6.4

Gauge Height (ft)

September 5, 2026

Seasonal Comparison

Oceanic Nino Index

SNOFLO®

Spoon River At Seville, Il Realtime Data

SPOON RIVER AT SEVILLE, IL

Realtime Data • Report • Conditions

420

Discharge (cfs)

6.4

Gauge Height (ft)

September 5, 2026

Seasonal Comparison

Oceanic Nino Index

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