Grand River at Ionia, MI
USGS Site No: 04116000 • Grand River • Ionia County, MI
Grand River at Ionia, MI on the Grand River is currently at 1,850 cfs (High — 77th percentile for this date) . Gage height: 10.07 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 | 488 | |
| 25th | Low threshold | 604 | |
| 50th (Median) | Normal (median) | 918 | |
| 75th | High threshold | 1,650 | |
| 95th | Very High threshold | 4,000 | Today: 1,850 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 | 1,920 | — |
| May 28, 2026 | 2,070 | — |
| May 27, 2026 | 2,230 | — |
| May 26, 2026 | 2,290 | — |
| May 25, 2026 | 2,220 | — |
| May 24, 2026 | 1,770 | — |
| May 23, 2026 | 1,590 | — |
| May 22, 2026 | 1,630 | — |
| May 21, 2026 | 1,750 | — |
| May 20, 2026 | 1,900 | — |
| May 19, 2026 | 1,900 | — |
| May 18, 2026 | 1,890 | — |
| May 17, 2026 | 1,990 | — |
| May 16, 2026 | 2,040 | — |
| May 15, 2026 | 2,040 | — |
| Apr 21, 2026 | 12,600 | — |
| Apr 20, 2026 | 14,200 | — |
| Apr 19, 2026 | 15,400 | — |
| Apr 18, 2026 | 15,800 | — |
| Apr 17, 2026 | 14,700 | — |
| Apr 16, 2026 | 11,600 | — |
| Apr 15, 2026 | 8,050 | — |
| Apr 14, 2026 | 7,060 | — |
| Apr 13, 2026 | 7,570 | — |
| Apr 12, 2026 | 8,350 | — |
| Apr 11, 2026 | 9,450 | — |
| Apr 10, 2026 | 10,600 | — |
| Apr 9, 2026 | 12,300 | — |
| Apr 8, 2026 | 14,300 | — |
| Apr 7, 2026 | 16,600 | — |
Station Information
- USGS Site No
- 04116000
- State
- MI
- County
- Ionia County
- Coordinates
- 42.9720, -85.0692
- Drainage Area
- 2,840 mi²
- Datum (ft)
- 614.6
- HUC Code
- 04050006
Flood Stage Thresholds
- Action Stage
- 13.5 ft
- Flood Stage
- 21.0 ft
- Moderate Flood
- 23.0 ft
- Major Flood
- 25.0 ft
Currently 10.93 ft below flood stage.
Recent Extremes
- Max discharge
-
17,900 cfsApr 6, 2026
- Min discharge
-
324 cfsSep 20, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Grand River at Portland, MIHigh11.3 mi · 965 cfs
-
Flat River at Smyrna, MIUnknown11.4 mi · 0 cfs
-
Looking Glass River Near Eagle, MINormal18.6 mi · 126 cfs
-
Fish Creek Near Crystal, MINormal19.7 mi · 25 cfs
-
Maple River at Maple Rapids, MINormal21.2 mi · 177 cfs