St. Marys River Near Fort Wayne, IN
USGS Site No: 04182000 • St. Marys River • Allen County, IN
St. Marys River Near Fort Wayne, IN on the St. Marys River is currently at 409 cfs (High — 82th percentile for this date) . Gage height: 2.88 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 | 17 | |
| 25th | Low threshold | 27 | |
| 50th (Median) | Normal (median) | 53 | |
| 75th | High threshold | 147 | |
| 95th | Very High threshold | 903 | Today: 409 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 28, 2026 | 638 | — |
| May 27, 2026 | 749 | — |
| May 26, 2026 | 784 | — |
| May 25, 2026 | 941 | — |
| May 24, 2026 | 1,320 | — |
| May 23, 2026 | 1,340 | — |
| May 22, 2026 | 620 | — |
| May 21, 2026 | 614 | — |
| May 20, 2026 | 455 | — |
| May 19, 2026 | 278 | — |
| May 18, 2026 | 195 | — |
| May 17, 2026 | 224 | — |
| May 16, 2026 | 256 | — |
| May 15, 2026 | 312 | — |
| Apr 21, 2026 | 439 | — |
| Apr 20, 2026 | 713 | — |
| Apr 19, 2026 | 1,030 | — |
| Apr 18, 2026 | 916 | — |
| Apr 17, 2026 | 930 | — |
| Apr 16, 2026 | 1,090 | — |
| Apr 15, 2026 | 379 | — |
| Apr 14, 2026 | 203 | — |
| Apr 13, 2026 | 238 | — |
| Apr 12, 2026 | 297 | — |
| Apr 11, 2026 | 408 | — |
| Apr 10, 2026 | 628 | — |
| Apr 9, 2026 | 992 | — |
| Apr 8, 2026 | 1,550 | — |
| Apr 7, 2026 | 2,530 | — |
| Apr 6, 2026 | 3,600 | — |
Station Information
- USGS Site No
- 04182000
- State
- IN
- County
- Allen County
- Coordinates
- 40.9878, -85.1119
- Drainage Area
- 762 mi²
- Datum (ft)
- 748.4
- HUC Code
- 04100004
Flood Stage Thresholds
- Action Stage
- 12.0 ft
- Flood Stage
- 14.0 ft
- Moderate Flood
- 17.0 ft
- Major Flood
- 19.0 ft
Currently 11.12 ft below flood stage.
Recent Extremes
- Max discharge
-
5,030 cfsApr 4, 2026
- Min discharge
-
30 cfsSep 17, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Maumee River at Coliseum Blvd at Fort Wayne, INNormal6.5 mi · 925 cfs
-
Maumee River at Fort Wayne, INNormal6.5 mi · 780 cfs
-
St. Marys River at Main St. at Fort Wayne, INVery High6.7 mi · 495 cfs
-
Maumee River at New Haven, INHigh8.2 mi · 909 cfs
-
St. Joseph River at Parnell Av at Fort Wayne, INUnknown8.4 mi · 0 cfs