Monocacy River Flow Today
As of October 14, 2026 at 3:30 AM, the Monocacy River is flowing at 822 cfs at Jug Bridge Near Frederick, MD — 254% of normal for the date and down 68% in 24 hours. 3 of 3 USGS gauges reported in the last 3 days; flows range from 112 to 822 cfs. ❤ Favorite
Monocacy River map
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Monocacy River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Jug Bridge Near Frederick, the Monocacy River is running 822 cfs — 254% of normal, down 68% since yesterday. Along the river, 3 of 3 reporting gauges are above normal (the typical gauge is at 254% of normal).
In the last 24 hours the river is dropping at Jug Bridge Near Frederick (-68%) and Frederick (-65%).
How the Monocacy River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Bridgeport332 ft 112 cfs246%
- Frederick259 ft 684 cfs262%
- Jug Bridge Near Frederick231 ft 822 cfs254%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Monocacy River streamgauge, placed by its own percent of normal. The line is the typical gauge (254%).
Monocacy River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Monocacy River At Bridgeport MD
Oct 14, 3:30 AM · USGS 01639000 |
112 cfs | 246% | -57% | 3.36 ft | 9.6 ft below | 332 ft |
|
Monocacy River At Monocacy Blvd At Frederick MD
Oct 14, 3:15 AM · USGS 01642190 |
684 cfs | 262% | -65% | 3.00 ft | 14.8 ft below | 259 ft |
|
Monocacy River At Jug Bridge Near Frederick MD
Oct 14, 3:30 AM · USGS 01643000 |
822 cfs | 254% | -68% | 3.27 ft | 11.7 ft below | 231 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Monocacy River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Monocacy River streamflow over time
Daily total flow across every monitored gauge on the river.
Maximum streamflow by year
Monocacy River
The Monocacy River is a 58-mile-long tributary of the Potomac River that flows through Maryland and Pennsylvania. It played a significant role in the Civil War Battle of Monocacy in 1864. The river's hydrology is heavily influenced by precipitation, with significant flooding occurring during heavy rainfall events. The river has several reservoirs and dams, including the Lake Linganore Dam, which provides drinking water to the city of Frederick. The river is used for various recreational activities such as fishing, kayaking, and boating. Additionally, the river provides water for irrigation to nearby agricultural lands. The Monocacy River is a vital resource for the local communities and wildlife in the area.
Fishing near the Monocacy River
About the Monocacy River
How is the Monocacy River flowing right now?
As of October 14, 2026, the Monocacy River is flowing at 822 cfs at Jug Bridge Near Frederick, MD, about 254% of normal for the date. Across its 3 USGS gauges, current flows range from 112 to 822 cfs. Every gauge’s live reading is in the table above.
Is the Monocacy River running high or low?
The typical gauge on the Monocacy River is at 254% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Monocacy River?
The National Weather Service sets flood stages for Bridgeport (13.0 ft), Frederick (17.8 ft), Jug Bridge Near Frederick (15.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.