Major Flood
19 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
16 ft
Minor Flood
11 ft
Action Stage
9 ft
What Floods at Each Level
21 ft
More than a quarter mile of US 301 is flooded. Several businesses south of Maryland Route 4 are flooded with significant damage likely. A small portion of the lower grounds of the Prince Georges Equestrian Center floods. Water approaches the westernmost and lowermost portion of the Prince Georges County Courthouse.
19 ft
US 301 begins to flood from the bridge northward to the intersection with Marlboro Square Shopping Center. Nearby businesses begin to flood. Marlboro Pike/Main Street also floods at the river, with water approaching nearby homes and businesses.
16 ft
Floodwaters reach the parking lot of businesses off US 301. Water also approaches the southern perimeter of the Prince Georges Equestrian Center grounds.
14 ft
Water covers almost all of the pedestrian bridge paralleling Water Street, and covers Water Street from the MD Route 4 westbound exit ramps to Judges Street.
12 ft
Much of Race Track Road floods between Marlboro Pike and the community center.
11 ft
The Water Street bridge in Upper Marlboro is completely covered by water.
9 ft
Water begins to overflow the banks into the wide floodplain near Upper Marlboro.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 8, 2011 | 21.18 ft | — |
| May 11, 2008 | 18.55 ft | — |
| Aug 28, 2011 | 16.81 ft | — |
About This Gauge
USGS Site
NWS LID
UPRM2
River
Western Branch
County
Prince Georges, MD
Coordinates
38.8142°N, 76.7486°W
Get Flood Alerts for Western Branch
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Western Branch at Upper Marlboro?
The Western Branch at Upper Marlboro gauge is maintained by USGS (site 01594526) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Western Branch at Upper Marlboro?
The NWS-defined flood stage for Western Branch at Upper Marlboro is 11 feet. Action stage begins at 9 feet. Moderate flooding starts at 16 feet, and major flooding at 19 feet.
How do I get alerts when Western Branch rises?
Download StormCast free on Google Play, go to River Gauges, and add Western Branch at Upper Marlboro to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Western Branch at Upper Marlboro gauge located?
The gauge is located in Prince Georges County, Maryland at coordinates 38.8142°N, 76.7486°W. USGS site number: 01594526. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Western Branch
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.