How high is the Great Miami River at Hamilton OH right now?

The Great Miami River at Hamilton OH is currently flowing at 15,900 cubic feet per second with a gage height of 66.93 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Great Miami River at Hamilton OH normal for this time of year?

Current flow is classified as very high for October 27. Today's discharge is at the 124th percentile compared to the long-term historical record at this gauge.

Is the Great Miami River at Hamilton OH at flood stage?

No — the gage height is 8.07 feet below the NWS flood-stage threshold of 75.0 feet.

What is the historical median flow for the Great Miami River at Hamilton OH on October 27?

The long-term median discharge for this date is 824 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 448 to 4,110 cfs.

Where is the Great Miami River at Hamilton OH stream gauge located?

The Great Miami River at Hamilton OH stream gauge is operated by the USGS in Butler County, OH on the Great Miami River. USGS site number 03274000 (coordinates 39.3912, -84.5722).

Great Miami River at Hamilton OH

USGS Site No: 03274000 • Great Miami River • Butler County, OH

Great Miami River at Hamilton OH on the Great Miami River is currently at 15,900 cfs (Very High — 124th percentile for this date) . Gage height: 66.93 ft.

Reading from 4 months ago

↑ Upstream on Great Miami River

Great Miami River at Middletown OH

15,900

CFS Discharge

66.93

Gage Height (ft)

Very High

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 27 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold
10th	Very Low threshold	448
25th	Low threshold	584
50th (Median)	Normal (median)	824
75th	High threshold	1,240
95th	Very High threshold	4,110

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	28,300	—
May 27, 2026	16,700	—
May 26, 2026	13,000	—
May 25, 2026	23,900	—
May 24, 2026	31,000	—
May 23, 2026	36,100	—
May 22, 2026	14,700	—
May 21, 2026	21,300	—
May 20, 2026	15,200	—
May 19, 2026	3,300	—
May 18, 2026	2,320	—
May 17, 2026	2,680	—
May 16, 2026	2,250	—
May 15, 2026	2,350	—
Apr 21, 2026	1,880	—
Apr 20, 2026	2,010	—
Apr 19, 2026	2,180	—
Apr 18, 2026	2,300	—
Apr 17, 2026	2,420	—
Apr 16, 2026	2,060	—
Apr 15, 2026	2,150	—
Apr 14, 2026	2,260	—
Apr 13, 2026	2,340	—
Apr 12, 2026	2,450	—
Apr 11, 2026	2,670	—
Apr 10, 2026	2,950	—
Apr 9, 2026	3,290	—
Apr 8, 2026	3,710	—
Apr 6, 2026	4,940	—
Apr 5, 2026	5,060	—

Station Information

USGS Site No: 03274000
State: OH
County: Butler County
Coordinates: 39.3912, -84.5722
Drainage Area: 3,630 mi²
Datum (ft): 499.2
HUC Code: 05080002

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 73.0 ft
Flood Stage: 75.0 ft
Moderate Flood: 82.0 ft
Major Flood: 89.5 ft

Currently 8.07 ft below flood stage.

Recent Extremes

Max discharge: 42,900 cfs

Mar 5, 2026
Min discharge: 511 cfs

Sep 17, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Mill Creek at East Sharon Road at Sharonville OH
11.3 mi · 157 cfs

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Mill Creek at Evendale OH
12.3 mi · 188 cfs

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Mill Creek at Reading OH
13.6 mi · 14 cfs

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Mill Creek at Carthage OH
14.1 mi · 464 cfs

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O'bannon Creek Near Loveland OH
20.1 mi · 36 cfs

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