Red River at Port Royal, TN
USGS Site No: 03436100 • Red River • Montgomery County, TN
Red River at Port Royal, TN on the Red River is currently at 1,580 cfs (Very High — 96th percentile for this date) . Gage height: 7.68 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 | 90 | |
| 25th | Low threshold | 121 | |
| 50th (Median) | Normal (median) | 186 | |
| 75th | High threshold | 573 | |
| 95th | Very High threshold | 1,390 |
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 | 2,570 | — |
| May 27, 2026 | 4,540 | — |
| May 26, 2026 | 1,960 | — |
| May 25, 2026 | 1,160 | — |
| May 24, 2026 | 1,450 | — |
| May 23, 2026 | 1,190 | — |
| May 22, 2026 | 752 | — |
| May 21, 2026 | 632 | — |
| May 20, 2026 | 219 | — |
| May 19, 2026 | 177 | — |
| May 18, 2026 | 179 | — |
| May 17, 2026 | 191 | — |
| May 16, 2026 | 200 | — |
| May 15, 2026 | 215 | — |
| Apr 20, 2026 | 223 | — |
| Apr 19, 2026 | 238 | — |
| Apr 18, 2026 | 242 | — |
| Apr 17, 2026 | 241 | — |
| Apr 16, 2026 | 234 | — |
| Apr 15, 2026 | 238 | — |
| Apr 14, 2026 | 252 | — |
| Apr 13, 2026 | 258 | — |
| Apr 12, 2026 | 258 | — |
| Apr 11, 2026 | 266 | — |
| Apr 10, 2026 | 280 | — |
| Apr 9, 2026 | 299 | — |
| Apr 8, 2026 | 325 | — |
| Apr 7, 2026 | 374 | — |
| Apr 6, 2026 | 414 | — |
| Apr 5, 2026 | 349 | — |
Station Information
- USGS Site No
- 03436100
- State
- TN
- County
- Montgomery County
- Coordinates
- 36.5547, -87.1419
- Drainage Area
- 926 mi²
- Datum (ft)
- 376.3
- HUC Code
- 05130206
Flood Stage Thresholds
- Action Stage
- 25.0 ft
- Flood Stage
- 30.0 ft
- Moderate Flood
- 38.0 ft
- Major Flood
- 40.0 ft
Currently 22.32 ft below flood stage.
Recent Extremes
- Max discharge
-
6,660 cfsMay 21, 2025
- Min discharge
-
97 cfsOct 18, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Cumberland River Below Cheatham Dam, TNLow16.7 mi · 3,970 cfs
-
Sycamore Creek Near Ashland City, TNHigh17.0 mi · 70 cfs
-
Cumberland River at Ashland City, TNNormal20.0 mi · 12,100 cfs
-
South Fork Little River at Highway 68-80 near Hopkinsville, KYNormal23.5 mi · 26 cfs
-
South Fork Little River at Highway 68 By-Pass at Hopkinsville,kyNormal25.8 mi · 45 cfs