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 — 81th percentile for this date) . Gage height: 3.46 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 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 | 728 | |
| 25th | Low threshold | 824 | |
| 50th (Median) | Normal (median) | 915 | |
| 75th | High threshold | 1,060 | |
| 95th | Very High threshold | 1,350 | 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.
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
Recent Extremes
- Max discharge
-
6,100 cfsApr 14, 2026
- Min discharge
-
560 cfsDec 14, 2025
Computed from the local daily-values archive.
Nearby Gauges
-
Au Sable River Near Red Oak, MIHigh8.0 mi · 1,200 cfs
-
Nb Au Sable River at Kelloggs Branch Near Lovells, MIVery High14.7 mi · 262 cfs
-
Au Sable River Near Mc Kinley, MIHigh14.8 mi · 1,520 cfs
-
South Branch Au Sable River Near Luzerne, MIHigh16.3 mi · 271 cfs
-
Au Sable River Near Curtisville, MIHigh17.5 mi · 1,430 cfs