Monocacy River at Jug Bridge Near Frederick, MD
USGS Site No: 01643000 • Monocacy River • Frederick County, MD
Monocacy River at Jug Bridge Near Frederick, MD on the Monocacy River is currently at 917 cfs (High — 80th percentile for this date) . Gage height: 3.25 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 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 | 203 | |
| 25th | Low threshold | 292 | |
| 50th (Median) | Normal (median) | 432 | |
| 75th | High threshold | 646 | |
| 95th | Very High threshold | 1,840 | Today: 917 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 | 1,460 | — |
| May 27, 2026 | 1,550 | — |
| May 26, 2026 | 1,970 | — |
| May 25, 2026 | 3,010 | — |
| May 24, 2026 | 4,930 | — |
| May 23, 2026 | 2,710 | — |
| May 22, 2026 | 867 | — |
| May 21, 2026 | 351 | — |
| May 20, 2026 | 210 | — |
| May 19, 2026 | 186 | — |
| May 18, 2026 | 201 | — |
| May 17, 2026 | 214 | — |
| May 16, 2026 | 234 | — |
| May 15, 2026 | 242 | — |
| Apr 21, 2026 | 418 | — |
| Apr 20, 2026 | 424 | — |
| Apr 19, 2026 | 393 | — |
| Apr 18, 2026 | 381 | — |
| Apr 17, 2026 | 430 | — |
| Apr 16, 2026 | 517 | — |
| Apr 15, 2026 | 464 | — |
| Apr 14, 2026 | 438 | — |
| Apr 13, 2026 | 456 | — |
| Apr 12, 2026 | 473 | — |
| Apr 11, 2026 | 512 | — |
| Apr 10, 2026 | 544 | — |
| Apr 9, 2026 | 578 | — |
| Apr 8, 2026 | 657 | — |
| Apr 7, 2026 | 855 | — |
| Apr 6, 2026 | 1,080 | — |
Station Information
- USGS Site No
- 01643000
- State
- MD
- County
- Frederick County
- Coordinates
- 39.4028, -77.3661
- Drainage Area
- 817 mi²
- Datum (ft)
- 231.1
- HUC Code
- 02070009
Flood Stage Thresholds
- Action Stage
- 13.0 ft
- Flood Stage
- 15.0 ft
- Moderate Flood
- 17.0 ft
- Major Flood
- 20.0 ft
Currently 11.75 ft below flood stage.
Recent Extremes
- Max discharge
-
9,680 cfsMay 14, 2025
- Min discharge
-
86 cfsSep 15, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Potomac River at Point Of Rocks, MDVery High13.0 mi · 34,600 cfs
-
Cattail Creek Near Glenwood, MDNormal19.7 mi · 17 cfs
-
Patuxent River Near Unity, MDNormal20.1 mi · 24 cfs
-
Morgan Run Near Louisville, MDNormal22.2 mi · 22 cfs
-
Patuxent River Below Brighton Dam Near Brighton MDVery Low24.2 mi · 12 cfs