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

The Illinois River at Henry, IL is currently flowing at 8,320 cubic feet per second with a gage height of 14.72 feet, based on the most recent USGS instantaneous reading.

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

Current flow is classified as low for June 11. Today's discharge is at the 16th percentile compared to the long-term historical record at this gauge.

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

No — the gage height is 8.28 feet below the NWS flood-stage threshold of 23.0 feet.

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

The long-term median discharge for this date is 17,300 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 6,960 to 48,000 cfs.

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

The Illinois River at Henry, IL stream gauge is operated by the USGS in Marshall County, IL on the Illinois River. USGS site number 05558300 (coordinates 41.1073, -89.3562).

Illinois River at Henry, IL

USGS Site No: 05558300 • Illinois River • Marshall County, IL

Illinois River at Henry, IL on the Illinois River is currently at 8,320 cfs (Low — 16th percentile for this date) . Gage height: 14.72 ft.

Reading from 1 week ago

↑ Upstream on Illinois River

Illinois River at Marseilles, IL

Downstream on Illinois River ↓

Illinois River at Kingston Mines, IL

8,320

CFS Discharge

14.72

Gage Height (ft)

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	6,960
25th	Low threshold	10,600	Today: 8,320 cfs
50th (Median)	Normal (median)	17,300
75th	High threshold	23,800
95th	Very High threshold	48,000

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	9,150	14.88
May 27, 2026	9,570	15.00
May 26, 2026	9,910	15.01
May 25, 2026	8,610	14.91
May 24, 2026	8,250	14.79
May 23, 2026	7,220	14.70
May 22, 2026	8,260	14.72
May 21, 2026	9,110	14.83
May 20, 2026	10,200	15.06
May 19, 2026	10,500	15.34
May 18, 2026	9,470	15.24
May 17, 2026	7,880	14.97
May 16, 2026	11,500	15.00
May 15, 2026	10,800	15.34
Apr 20, 2026	39,500	21.76
Apr 19, 2026	40,900	21.48
Apr 18, 2026	37,400	20.94
Apr 17, 2026	31,300	20.40
Apr 16, 2026	29,100	20.23
Apr 15, 2026	26,400	20.22
Apr 14, 2026	26,000	20.41
Apr 13, 2026	26,900	20.67
Apr 12, 2026	26,700	20.92
Apr 11, 2026	29,700	21.16
Apr 10, 2026	32,500	21.51
Apr 9, 2026	35,800	21.82
Apr 8, 2026	37,400	22.02
Apr 7, 2026	44,400	22.05
Apr 6, 2026	50,400	21.77
Apr 5, 2026	47,600	20.66

Station Information

USGS Site No: 05558300
State: IL
County: Marshall County
Coordinates: 41.1073, -89.3562
Drainage Area: 13,544 mi²
Datum (ft): 425.9
HUC Code: 07130001

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 22.0 ft
Flood Stage: 23.0 ft
Moderate Flood: 24.0 ft
Major Flood: 31.0 ft

Currently 8.28 ft below flood stage.

Recent Extremes

Max discharge: 50,400 cfs

Apr 6, 2026
Min discharge: 1,430 cfs

Sep 12, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

East Bureau Creek Near Bureau, IL
15.8 mi · 2 cfs

Very Low
Big Bureau Creek at Princeton, IL
19.4 mi · 19 cfs

Very Low
Vermilion River Near Leonore, IL
23.2 mi · 415 cfs

Normal
Indian Creek Near Wyoming, IL
25.7 mi · 27 cfs

Normal
Fondulac Creek Near East Peoria, IL
31.1 mi · 0 cfs

Normal