How high is the Au Sable River at Mio, MI right now?

The Au Sable River at Mio, MI is currently flowing at 1,150 cubic feet per second with a gage height of 3.46 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Au Sable River at Mio, MI normal for this time of year?

Current flow is classified as high for June 11. Today's discharge is at the 76th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the Au Sable River at Mio, MI on June 11?

The long-term median discharge for this date is 963 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 769 to 1,600 cfs.

Where is the Au Sable River at Mio, MI stream gauge located?

The Au Sable River at Mio, MI stream gauge is operated by the USGS in Oscoda County, MI on the Au Sable River. USGS site number 04136500 (coordinates 44.6600, -84.1311).

Au Sable River at Mio, MI

USGS Site No: 04136500 • Au Sable River • Oscoda County, MI

Au Sable River at Mio, MI on the Au Sable River is currently at 1,150 cfs (High — 76th percentile for this date) . Gage height: 3.46 ft.

Reading from 1 week ago

↑ Upstream on Au Sable River

Au Sable River Near Red Oak, MI

Downstream on Au Sable River ↓

Au Sable River Near Mc Kinley, MI

1,150

CFS Discharge

3.46

Gage Height (ft)

High

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	769
25th	Low threshold	832
50th (Median)	Normal (median)	963
75th	High threshold	1,120
95th	Very High threshold	1,600	Today: 1,150 cfs

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	1,180	—
May 28, 2026	1,220	—
May 27, 2026	1,290	—
May 26, 2026	1,400	—
May 25, 2026	1,470	—
May 24, 2026	1,350	—
May 23, 2026	1,430	—
May 22, 2026	1,540	—
May 21, 2026	1,690	—
May 20, 2026	1,930	—
May 19, 2026	2,000	—
May 18, 2026	1,560	—
May 17, 2026	1,270	—
May 16, 2026	1,300	—
May 15, 2026	1,370	—
Apr 21, 2026	2,350	—
Apr 20, 2026	2,650	—
Apr 19, 2026	3,070	—
Apr 18, 2026	3,360	—
Apr 17, 2026	4,120	—
Apr 16, 2026	4,930	—
Apr 15, 2026	5,660	—
Apr 14, 2026	6,100	—
Apr 13, 2026	5,440	—
Apr 12, 2026	3,060	—
Apr 11, 2026	1,930	—
Apr 10, 2026	1,840	—
Apr 9, 2026	1,720	—
Apr 8, 2026	1,840	—
Apr 7, 2026	2,020	—

Station Information

USGS Site No: 04136500
State: MI
County: Oscoda County
Coordinates: 44.6600, -84.1311
Drainage Area: 1,361 mi²
Datum (ft): 929.2
HUC Code: 04070007

View on USGS NWIS →

Recent Extremes

Max discharge: 6,100 cfs

Apr 14, 2026
Min discharge: 560 cfs

Dec 14, 2025

Computed from the local daily-values archive.

Nearby Gauges

Au Sable River Near Red Oak, MI
8.0 mi · 1,200 cfs

High
Nb Au Sable River at Kelloggs Branch Near Lovells, MI
14.7 mi · 262 cfs

Very High
Au Sable River Near Mc Kinley, MI
14.8 mi · 1,520 cfs

High
South Branch Au Sable River Near Luzerne, MI
16.3 mi · 271 cfs

High
Au Sable River Near Curtisville, MI
17.5 mi · 1,430 cfs

High