TidalMapMonocacy River at Monocacy Blvd at Frederick, MD Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 01642190 sits on the Monocacy River and reads everything draining 703 square miles of the Monocacy basin. Its datum sits 240 feet above sea level NAVD88. Daily flow has been on record here since 2004, 23 years of it.
Where this gauge sits in the drainage
One gauged site sits upstream of here. The closest is Monocacy River at Bridgeport, MD, reading 173 square miles. This gauge adds the 530 square miles that drain in between. Downstream the next reading comes from Monocacy River at Jug Bridge near Frederick, MD at 817 square miles, so what passes this gauge is about 86% of the water measured there. Water passing here goes on to Monocacy River near Dickerson, MD and Potomac River at Edwards Ferry near Poolesville,md.
Normal flows here
The Monocacy River runs a median of 444 cfs at this gauge across 23 years of record. March is the fullest month at a median 862 cfs, and September the leanest at 140 cfs. The highest daily mean on record is 25,700 cfs in 2021, and the lowest is 27 cfs in 2023.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 632 cfs | 142% |
| Feb | 833 cfs | 187% |
| Mar | 862 cfs | 194% |
| Apr | 756 cfs | 170% |
| May | 667 cfs | 150% |
| Jun | 342 cfs | 77% |
| Jul | 205 cfs | 46% |
| Aug | 170 cfs | 38% |
| Sep | 140 cfs | 31% |
| Oct | 220 cfs | 49% |
| Nov | 344 cfs | 77% |
| Dec | 593 cfs | 133% |
Medians from the USGS daily-statistics record, 2004 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
The Monocacy River reaches flood stage at this gauge at 17.8 feet. NWS starts watching it at 15.5 feet. The highest crest on record is 25.9 feet, in September 2021.
| Category | Gage height |
|---|---|
| Action | 15.5 ft |
| Minor flooding | 17.8 ft |
| Moderate flooding | 20.2 ft |
| Major flooding | 23.5 ft |
| When | Crest |
|---|---|
| September 2021 | 25.9 ft |
| October 2012 | 25.6 ft |
| December 2003 | 24.7 ft |
| April 2011 | 24.6 ft |
| September 2018 | 24.6 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge FRMM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Linganore Creek at Linganore Rd near Frederick, MD
- Monocacy River at Jug Bridge near Frederick, MD
- Fishing Creek at Mountaindale, MD
- Bennett Creek at Park Mills, MD
- Catoctin Creek near Middletown, MD
- Soper Branch at Hyattstown, MD
- Monocacy River near Dickerson, MD
- Big Pipe Creek at Bruceville, MD
- Tenmile Creek near Clarksburg, MD
- Potomac River at Point of Rocks, MD
- Tenmile Creek near Boyds, MD
- Sams Creek at Mckinstrys Mill, MD
Live streamflow and gage height: USGS gauge 01642190. Percentile context computed against the gauge's period of record. Not for navigation.
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