Tombigbee River at Demopolis L&D near Coatopa, AL: flow right now vs. normal
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—flow right now
—of typical for this month
—gage height
The Tombigbee River at Demopolis L&D near Coatopa, AL gauge has averaged 20,596 cfs over 98 years of monthly records. Flow is usually highest in March (45,995 cfs) and lowest in October (4,717 cfs).
Typical flow by month
Highest in March (45,995 cfs), lowest in October (4,717 cfs).
Key figures
- Average flow
- 20,596 cfs
- Highest peak on record
- 416,000 cfs
- Year of that peak
- 2020
- Drainage area
- 15,385 sq mi
- Years of records
- 98
- Gauge elevation
- 0 ft
- River
- Tombigbee River
- County
- Marengo
- State
- Alabama
Monthly numbers
| Month | Average | Median | Lowest | Highest |
|---|---|---|---|---|
| Jan | 36,485 cfs | 30,400 cfs | 2,750 cfs | 104,000 cfs |
| Feb | 44,524 cfs | 38,700 cfs | 7,830 cfs | 170,000 cfs |
| Mar | 45,995 cfs | 41,000 cfs | 8,120 cfs | 130,000 cfs |
| Apr | 38,763 cfs | 30,150 cfs | 3,490 cfs | 128,000 cfs |
| May | 19,042 cfs | 11,700 cfs | 2,320 cfs | 150,000 cfs |
| Jun | 10,476 cfs | 6,690 cfs | 1,630 cfs | 67,000 cfs |
| Jul | 8,227 cfs | 5,460 cfs | 1,600 cfs | 79,700 cfs |
| Aug | 5,086 cfs | 4,520 cfs | 1,020 cfs | 15,900 cfs |
| Sep | 4,923 cfs | 3,418 cfs | 806 cfs | 38,800 cfs |
| Oct | 4,717 cfs | 2,745 cfs | 793 cfs | 45,400 cfs |
| Nov | 8,703 cfs | 5,078 cfs | 1,040 cfs | 78,300 cfs |
| Dec | 21,698 cfs | 14,600 cfs | 2,270 cfs | 105,000 cfs |
Monthly averages of daily flow over the gauge's record. Lowest and highest are the extreme monthly averages for that month.
How Tombigbee River at Demopolis L&D near Coatopa, AL compares in Alabama
- Tombigbee River at Demopolis L&D near Coatopa, AL ranks #4 of 134 gauges in Alabama in this dataset by average flow.
- That places it in the top 3% in Alabama by average flow.
- The median average flow of gauges in Alabama is 198 cfs.
- Among all 2,293 gauges in the dataset, Tombigbee River at Demopolis L&D near Coatopa, AL ranks #31 by average flow.
Data: U.S. Geological Survey (USGS) (public domain, U.S. federal data).· Updated 2026-11-02 · Text generated from the data and checked against it.
Live values are provisional USGS data. Measurements only, not a safety assessment — for flood warnings see the National Weather Service. Official page: USGS 02467000.