Monocacy River at Monocacy Blvd. in Frederick, MD
River level and flood forecast · Frederick County
The river is 11.7 ft below flood stage (17.8 ft).
Flow: 2,590 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
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An email when the National Weather Service forecasts Monocacy River at Monocacy Blvd. in Frederick to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 23.5 ft |
| Moderate flood stage | 20.2 ft |
| Flood stage | 17.8 ft |
| Action stage | 15.5 ft |
| Record crest (September 2, 2021) | 25.86 ft |
Highest crests on record
- 25.86 ft — September 2, 2021
- 25.56 ft — October 31, 2012
- 24.68 ft — December 12, 2003
- 24.57 ft — April 17, 2011
- 24.55 ft — September 10, 2018
Recent crests: 20.93 ft (January 10, 2024) · 20.73 ft (May 8, 2022) · 22.59 ft (September 24, 2021) · 25.86 ft (September 2, 2021) · 18.51 ft (May 1, 2020)
Up and down the river, and nearby
- UpstreamMonocacy River at Bridgeport, MD
- DownstreamMonocacy River near Frederick at Interstate 70, MD
- Catoctin Creek Near Middletown, MD
- Bennett Creek at Park Mills, MD
- Soper Branch at Hyattstown, MD, MD
- Big Pipe Creek at Bruceville, MD
- Potomac River at Point of Rocks, MD
- Ten Mile Creek near Clarksburg, MD
- Ten Mile Creek near Boyds, MD
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (FRMM2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.