How high is the Illinois River at Meredosia, IL right now?

The Illinois River at Meredosia, IL is currently flowing at 5,790 cubic feet per second with a gage height of 5.51 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Illinois River at Meredosia, IL normal for this time of year?

Current flow is classified as very low for June 11. Today's discharge is at the 5th percentile compared to the long-term historical record at this gauge.

Is the Illinois River at Meredosia, IL at flood stage?

No — the gage height is 11.49 feet below the NWS flood-stage threshold of 17.0 feet.

What is the historical median flow for the Illinois River at Meredosia, IL on June 11?

The long-term median discharge for this date is 23,200 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 11,300 to 72,300 cfs.

Where is the Illinois River at Meredosia, IL stream gauge located?

The Illinois River at Meredosia, IL stream gauge is operated by the USGS in Morgan County, IL on the Illinois River. USGS site number 05585500 (coordinates 39.8312, -90.5598).

Illinois River at Meredosia, IL

USGS Site No: 05585500 • Illinois River • Morgan County, IL

Illinois River at Meredosia, IL on the Illinois River is currently at 5,790 cfs (Very Low — 5th percentile for this date) . Gage height: 5.51 ft.

Reading from 1 week ago

↑ Upstream on Illinois River

Illinois River at Kingston Mines, IL

Downstream on Illinois River ↓

Illinois River at Valley City, IL

5,790

CFS Discharge

5.51

Gage Height (ft)

Very Low

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	11,300	Today: 5,790 cfs
25th	Low threshold	15,700
50th (Median)	Normal (median)	23,200
75th	High threshold	35,300
95th	Very High threshold	72,300

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	—	5.80
May 27, 2026	—	5.76
May 26, 2026	—	5.78
May 25, 2026	—	5.90
May 24, 2026	—	6.40
May 23, 2026	—	6.98
May 22, 2026	—	7.53
May 21, 2026	—	8.18
May 20, 2026	—	8.76
May 19, 2026	—	9.28
May 18, 2026	—	9.23
May 17, 2026	—	10.32
May 16, 2026	—	11.07
May 15, 2026	—	11.45
Apr 20, 2026	—	14.69
Apr 19, 2026	—	14.47
Apr 18, 2026	—	14.24
Apr 17, 2026	—	13.56
Apr 16, 2026	—	13.64
Apr 15, 2026	—	13.60
Apr 14, 2026	—	13.57
Apr 13, 2026	—	13.62
Apr 12, 2026	—	13.63
Apr 11, 2026	—	13.54
Apr 10, 2026	—	13.41
Apr 9, 2026	—	13.28
Apr 8, 2026	—	13.10
Apr 7, 2026	—	12.81
Apr 6, 2026	—	12.38
Apr 5, 2026	—	11.66

Station Information

USGS Site No: 05585500
State: IL
County: Morgan County
Coordinates: 39.8312, -90.5598
Drainage Area: 26,029 mi²
Datum (ft): 417.7
HUC Code: 07130011

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 14.0 ft
Flood Stage: 17.0 ft
Moderate Flood: 22.0 ft
Major Flood: 24.0 ft

Currently 11.49 ft below flood stage.

Nearby Gauges

Illinois River at Valley City, IL
9.9 mi · 14,900 cfs

Low
LA Moine River at Ripley, IL
13.9 mi · 276 cfs

Normal
North Fork Mauvaise Terre Creek near Jacksonville, IL
23.4 mi

Unknown
Hadley Creek Near Barry, IL
28.0 mi

Unknown
Sangamon River Near Oakford, IL
36.6 mi · 2,260 cfs

Normal