How high is the Nb Chicago River at Grand Avenue at Chicago, IL right now?

The Nb Chicago River at Grand Avenue at Chicago, IL is currently flowing at 425 cubic feet per second with a gage height of -1.97 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Nb Chicago River at Grand Avenue at Chicago, IL normal for this time of year?

Current flow is classified as low for June 11. Today's discharge is at the 23th percentile compared to the long-term historical record at this gauge.

Is the Nb Chicago River at Grand Avenue at Chicago, IL at flood stage?

No — the gage height is 4.97 feet below the NWS flood-stage threshold of 3.0 feet.

What is the historical median flow for the Nb Chicago River at Grand Avenue at Chicago, IL on June 11?

The long-term median discharge for this date is 591 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 0 to unavailable cfs.

Where is the Nb Chicago River at Grand Avenue at Chicago, IL stream gauge located?

The Nb Chicago River at Grand Avenue at Chicago, IL stream gauge is operated by the USGS in Cook County, IL on the Nb Chicago River. USGS site number 05536118 (coordinates 41.8923, -87.6424).

Nb Chicago River at Grand Avenue at Chicago, IL

USGS Site No: 05536118 • Nb Chicago River • Cook County, IL

Nb Chicago River at Grand Avenue at Chicago, IL on the Nb Chicago River is currently at 425 cfs (Low — 23th percentile for this date) . Gage height: -1.97 ft.

Reading from 1 week ago

↑ Upstream on Nb Chicago River

Nb Chicago River at North Pulaski Road at Chicago, IL

425

CFS Discharge

-1.97

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	0
25th	Low threshold	504	Today: 425 cfs
50th (Median)	Normal (median)	591
75th	High threshold	1,140
95th	Very High threshold	0

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	—	-1.71
May 27, 2026	—	-1.78
May 26, 2026	—	-1.79
May 25, 2026	—	-1.73
May 24, 2026	—	-1.91
May 23, 2026	—	-1.73
May 22, 2026	—	-1.84
May 21, 2026	—	-1.81
May 20, 2026	—	-1.80
May 19, 2026	—	-2.21
May 18, 2026	—	-2.20
May 17, 2026	—	-1.85
May 16, 2026	—	-2.05
May 15, 2026	—	-1.73
Apr 20, 2026	—	-1.78
Apr 19, 2026	—	-1.62
Apr 18, 2026	—	-2.36
Apr 17, 2026	—	-2.16
Apr 16, 2026	—	-2.15
Apr 15, 2026	—	-2.66
Apr 14, 2026	—	-2.39
Apr 13, 2026	—	-1.83
Apr 12, 2026	—	-2.01
Apr 11, 2026	—	-1.83
Apr 10, 2026	—	-2.33
Apr 9, 2026	—	-2.12
Apr 8, 2026	—	-1.69
Apr 7, 2026	—	-1.98
Apr 6, 2026	—	-1.85
Apr 5, 2026	—	-2.22

Station Information

USGS Site No: 05536118
State: IL
County: Cook County
Coordinates: 41.8923, -87.6424
Drainage Area: 179 mi²
Datum (ft): 579.2
HUC Code: 07120003

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 1.0 ft
Flood Stage: 3.0 ft
Moderate Flood: 4.0 ft
Major Flood: 5.0 ft

Currently 4.97 ft below flood stage.

Nearby Gauges

Chicago River at Columbus Drive at Chicago, IL
1.1 mi · 524 cfs

Very High
Nb Chicago River at North Pulaski Road at Chicago, IL
7.2 mi · 32 cfs

Normal
Des Plaines River at Riverside, IL
10.5 mi · 263 cfs

Normal
North Branch Chicago River at Niles, IL
11.4 mi · 38 cfs

Normal
Addison Creek at Bellwood, IL
11.7 mi · 4 cfs

Low