How high is the Rock River at Como, IL right now?

The Rock River at Como, IL is currently flowing at 6,220 cubic feet per second with a gage height of 4.59 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Rock River at Como, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 54th percentile compared to the long-term historical record at this gauge.

Is the Rock River at Como, IL at flood stage?

No — the gage height is 7.91 feet below the NWS flood-stage threshold of 12.5 feet.

What is the historical median flow for the Rock River at Como, IL on June 11?

The long-term median discharge for this date is 5,830 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 2,500 to 19,900 cfs.

Where is the Rock River at Como, IL stream gauge located?

The Rock River at Como, IL stream gauge is operated by the USGS in Whiteside County, IL on the Rock River. USGS site number 05443500 (coordinates 41.7722, -89.7456).

Rock River at Como, IL

USGS Site No: 05443500 • Rock River • Whiteside County, IL

Rock River at Como, IL on the Rock River is currently at 6,220 cfs (Normal — 54th percentile for this date) . Gage height: 4.59 ft.

Reading from 1 week ago

↑ Upstream on Rock River

Rock River at Dixon, IL

Downstream on Rock River ↓

Rock River Near Joslin, IL

6,220

CFS Discharge

4.59

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	2,500
25th	Low threshold	3,300
50th (Median)	Normal (median)	5,830
75th	High threshold	8,330	Today: 6,220 cfs
95th	Very High threshold	19,900

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	5,840	4.43
May 27, 2026	6,500	4.70
May 26, 2026	7,230	5.00
May 25, 2026	7,470	5.11
May 24, 2026	7,780	5.24
May 23, 2026	7,840	5.27
May 22, 2026	8,090	5.37
May 21, 2026	8,100	5.38
May 20, 2026	8,690	5.64
May 19, 2026	8,720	5.65
May 18, 2026	9,010	5.77
May 17, 2026	9,350	5.92
May 16, 2026	9,780	6.10
May 15, 2026	9,560	6.01
Apr 20, 2026	29,900	13.27
Apr 19, 2026	27,900	12.84
Apr 18, 2026	24,400	11.96
Apr 17, 2026	22,100	11.09
Apr 16, 2026	17,400	9.20
Apr 15, 2026	12,700	7.37
Apr 14, 2026	12,000	7.10
Apr 13, 2026	12,300	7.23
Apr 12, 2026	12,400	7.28
Apr 11, 2026	12,600	7.35
Apr 10, 2026	12,400	7.26
Apr 9, 2026	12,800	7.42
Apr 8, 2026	14,700	8.17
Apr 7, 2026	17,600	9.27
Apr 6, 2026	19,200	9.88
Apr 5, 2026	18,600	9.64

Station Information

USGS Site No: 05443500
State: IL
County: Whiteside County
Coordinates: 41.7722, -89.7456
Drainage Area: 8,753 mi²
Datum (ft): 603.1
HUC Code: 07090005

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 10.0 ft
Flood Stage: 12.5 ft
Moderate Flood: 15.5 ft
Major Flood: 18.0 ft

Currently 7.91 ft below flood stage.

Recent Extremes

Max discharge: 29,900 cfs

Apr 20, 2026
Min discharge: 2,560 cfs

Dec 9, 2025
Days at flood stage: 2

Computed from the local daily-values archive.

Nearby Gauges

Elkhorn Creek Near Penrose, IL
9.4 mi · 60 cfs

Normal
Rock River at Dixon, IL
14.3 mi · 5,770 cfs

Normal
Beaver Slough at 3rd Street at Clinton, IA
23.2 mi · 0 cfs

Unknown
Mississippi River at Clinton, IA
26.1 mi · 49,000 cfs

Normal
Rock River Near Joslin, IL
27.2 mi · 6,680 cfs

Normal