How high is the Vermilion River Near Leonore, IL right now?

The Vermilion River Near Leonore, IL is currently flowing at 415 cubic feet per second with a gage height of 4.36 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Vermilion River Near Leonore, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 31th percentile compared to the long-term historical record at this gauge.

Is the Vermilion River Near Leonore, IL at flood stage?

No — the gage height is 11.64 feet below the NWS flood-stage threshold of 16.0 feet.

What is the historical median flow for the Vermilion River Near Leonore, IL on June 11?

The long-term median discharge for this date is 706 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 203 to 6,230 cfs.

Where is the Vermilion River Near Leonore, IL stream gauge located?

The Vermilion River Near Leonore, IL stream gauge is operated by the USGS in LaSalle County, IL on the Vermilion River. USGS site number 05555300 (coordinates 41.2083, -88.9306).

Vermilion River Near Leonore, IL

USGS Site No: 05555300 • Vermilion River • LaSalle County, IL

Vermilion River Near Leonore, IL on the Vermilion River is currently at 415 cfs (Normal — 31th percentile for this date) . Gage height: 4.36 ft.

Reading from 1 week ago

↑ Upstream on Vermilion River

Vermilion River at Pontiac, IL

Downstream on Vermilion River ↓

Vermilion River Near Danville, IL

415

CFS Discharge

4.36

Gage Height (ft)

Normal

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	203
25th	Low threshold	327
50th (Median)	Normal (median)	706	Today: 415 cfs
75th	High threshold	1,310
95th	Very High threshold	6,230

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	504	4.52
May 27, 2026	564	4.66
May 26, 2026	562	4.66
May 25, 2026	495	4.51
May 24, 2026	385	4.31
May 23, 2026	370	4.28
May 22, 2026	387	4.31
May 21, 2026	433	4.39
May 20, 2026	501	4.51
May 19, 2026	523	4.56
May 18, 2026	508	4.53
May 17, 2026	492	4.49
May 16, 2026	489	4.48
May 15, 2026	494	4.49
Apr 20, 2026	2,210	7.46
Apr 19, 2026	2,760	8.16
Apr 18, 2026	2,120	7.32
Apr 17, 2026	1,040	5.66
Apr 16, 2026	915	5.44
Apr 15, 2026	820	5.24
Apr 14, 2026	812	5.23
Apr 13, 2026	833	5.27
Apr 12, 2026	902	5.41
Apr 11, 2026	1,020	5.63
Apr 10, 2026	1,220	6.00
Apr 9, 2026	1,490	6.43
Apr 8, 2026	1,880	7.02
Apr 7, 2026	2,560	7.91
Apr 6, 2026	3,670	9.36
Apr 5, 2026	6,780	12.74

Station Information

USGS Site No: 05555300
State: IL
County: LaSalle County
Coordinates: 41.2083, -88.9306
Drainage Area: 1,251 mi²
Datum (ft): 521.1
HUC Code: 07130002

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 15.5 ft
Flood Stage: 16.0 ft
Moderate Flood: 21.0 ft
Major Flood: 26.0 ft

Currently 11.64 ft below flood stage.

Recent Extremes

Max discharge: 6,780 cfs

Apr 5, 2026
Min discharge: 7 cfs

Oct 5, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Illinois River at Marseilles, IL
13.8 mi · 7,110 cfs

Low
Fox River at Dayton, IL
14.2 mi · 1,440 cfs

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Illinois River at Henry, IL
23.2 mi · 8,320 cfs

Low
East Bureau Creek Near Bureau, IL
25.0 mi · 2 cfs

Very Low
Hanson Gravel Pit at Culvert Near Morris, IL
25.6 mi · -76 cfs

Very High