How high is the St. Clair River at Port Huron, MI right now?

The St. Clair River at Port Huron, MI is currently flowing at 209,000 cubic feet per second with a gage height of 578.61 feet, based on the most recent USGS instantaneous reading.

Is the flow on the St. Clair River at Port Huron, MI normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 61th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the St. Clair River at Port Huron, MI on June 11?

The long-term median discharge for this date is 204,000 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 173,000 to unavailable cfs.

Where is the St. Clair River at Port Huron, MI stream gauge located?

The St. Clair River at Port Huron, MI stream gauge is operated by the USGS in St. Clair County, MI on the St. Clair River. USGS site number 04159130 (coordinates 42.9870, -82.4246).

St. Clair River at Port Huron, MI

USGS Site No: 04159130 • St. Clair River • St. Clair County, MI

St. Clair River at Port Huron, MI on the St. Clair River is currently at 209,000 cfs (Normal — 61th percentile for this date) . Gage height: 578.61 ft.

Reading from 1 week ago

209,000

CFS Discharge

578.61

Gage Height (ft)

Normal

Flow Condition

N/A

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	173,000
25th	Low threshold	186,000
50th (Median)	Normal (median)	204,000
75th	High threshold	215,000	Today: 209,000 cfs
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 29, 2026	196,000	—
May 28, 2026	205,000	578.59
May 27, 2026	210,000	578.58
May 26, 2026	197,000	578.49
May 25, 2026	202,000	578.51
May 24, 2026	205,000	578.44
May 23, 2026	213,000	578.51
May 22, 2026	210,000	578.52
May 21, 2026	212,000	578.63
May 20, 2026	218,000	578.61
May 19, 2026	203,000	578.47
May 18, 2026	194,000	578.28
May 17, 2026	207,000	578.45
May 16, 2026	196,000	578.31
May 15, 2026	194,000	578.35
Apr 22, 2026	204,000	—
Apr 21, 2026	191,000	577.97
Apr 20, 2026	198,000	578.24
Apr 19, 2026	199,000	578.30
Apr 18, 2026	186,000	578.00
Apr 17, 2026	194,000	578.05
Apr 16, 2026	194,000	578.02
Apr 15, 2026	190,000	577.85
Apr 14, 2026	194,000	577.78
Apr 13, 2026	188,000	577.69
Apr 12, 2026	186,000	577.50
Apr 11, 2026	194,000	577.62
Apr 10, 2026	197,000	577.68
Apr 9, 2026	180,000	577.42
Apr 8, 2026	182,000	577.39

Station Information

USGS Site No: 04159130
State: MI
County: St. Clair County
Coordinates: 42.9870, -82.4246
Drainage Area: 222,400 mi²
HUC Code: 04090001

View on USGS NWIS →

Recent Extremes

Max discharge: 218,000 cfs

May 20, 2026
Min discharge: 121,000 cfs

Feb 9, 2026

Computed from the local daily-values archive.

Nearby Gauges

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15.2 mi · 80 cfs

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16.3 mi · 40 cfs

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Belle River at Memphis, MI
18.4 mi · 44 cfs

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East Branch Coon Creek at Armada, MI
25.3 mi · 2 cfs

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North Branch Clinton River at 26 Mile near Meade, MI
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