Green River at Lock 2 at Calhoun, KY
USGS Site No: 03320000 • Green River • McLean County, KY
Green River at Lock 2 at Calhoun, KY on the Green River is currently at 15,700 cfs (Very High — 96th percentile for this date) . Gage height: 14.22 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 | 3,830 | |
| 25th | Low threshold | 4,820 | |
| 50th (Median) | Normal (median) | 6,850 | |
| 75th | High threshold | 8,540 | |
| 95th | Very High threshold | 14,800 |
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 | 18,800 | — |
| May 27, 2026 | 20,200 | — |
| May 26, 2026 | 14,900 | — |
| May 25, 2026 | 14,400 | — |
| May 24, 2026 | 13,100 | — |
| May 23, 2026 | 9,280 | — |
| May 22, 2026 | 1,870 | — |
| May 21, 2026 | 947 | — |
| May 20, 2026 | 808 | — |
| May 19, 2026 | 767 | — |
| May 18, 2026 | 817 | — |
| May 17, 2026 | 855 | — |
| May 16, 2026 | 908 | — |
| May 15, 2026 | 991 | — |
| Apr 20, 2026 | 1,710 | — |
| Apr 19, 2026 | 1,790 | — |
| Apr 18, 2026 | 1,800 | — |
| Apr 17, 2026 | 1,870 | — |
| Apr 16, 2026 | 1,880 | — |
| Apr 15, 2026 | 1,940 | — |
| Apr 14, 2026 | 2,030 | — |
| Apr 13, 2026 | 2,110 | — |
| Apr 12, 2026 | 2,220 | — |
| Apr 11, 2026 | 2,330 | — |
| Apr 10, 2026 | 2,460 | — |
| Apr 9, 2026 | 2,660 | — |
| Apr 8, 2026 | 2,900 | — |
| Apr 7, 2026 | 3,070 | — |
| Apr 6, 2026 | 3,020 | — |
| Apr 5, 2026 | 2,880 | — |
Station Information
- USGS Site No
- 03320000
- State
- KY
- County
- McLean County
- Coordinates
- 37.5339, -87.2639
- Drainage Area
- 7,566 mi²
- Datum (ft)
- 353.6
- HUC Code
- 05110005
Flood Stage Thresholds
- Action Stage
- 18.0 ft
- Flood Stage
- 23.0 ft
- Moderate Flood
- 26.0 ft
- Major Flood
- 32.0 ft
Currently 8.78 ft below flood stage.
Recent Extremes
- Max discharge
-
40,900 cfsJun 21, 2025
- Min discharge
-
767 cfsMay 19, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Green River at Rockport, KYUnknown19.8 mi · 0 cfs
-
South Fork Panther Creek Near Whitesville, KYVery High21.4 mi · 39 cfs
-
Green River at Lock 1 at Spottsville, KYVery High23.8 mi · 19,600 cfs
-
Green River at Paradise, KYHigh24.4 mi · 9,660 cfs
-
Pond River Near Apex, KYHigh28.6 mi · 415 cfs