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
12 ft
Minor Flood
9 ft
Action Stage
6 ft
What Floods at Each Level
19 ft
Water reaches Randolph Road.
13 ft
Water approaches a home on Kemps Mill Road.
12 ft
Kemps Mill Road begins to flood between Old Randolph Road and Glenallan Avenue.
10.5 ft
Water covers the old bridge over Northwest Branch at Old Randolph Road.
9 ft
Backyards of homes on Kemps Mill Road just south of Randolph Road are flooded.
7 ft
Water begins to flood low-lying portions of the old Indian Spring Country Club.
6 ft
The upper portion of the Northwest Branch Trail is flooded. Lowland flooding begins along the creek but is affecting nothing other than the trail.
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 |
|---|---|---|
| Jun 21, 1972 | 15.89 ft | 11,000 cfs |
| Jun 25, 2006 | 13.61 ft | 9,140 cfs |
| Apr 29, 2014 | 12.26 ft | 7,530 cfs |
About This Gauge
USGS Site
NWS LID
CLAM2
River
Northwest Branch
County
Montgomery, MD
Coordinates
39.0656°N, 77.0294°W
Get Flood Alerts for Northwest 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 Northwest Branch at Kemp Mill?
The Northwest Branch at Kemp Mill gauge is maintained by USGS (site 01650500) 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 Northwest Branch at Kemp Mill?
The NWS-defined flood stage for Northwest Branch at Kemp Mill is 9 feet. Action stage begins at 6 feet. Moderate flooding starts at 12 feet, and major flooding at 19 feet.
How do I get alerts when Northwest Branch rises?
Download StormCast free on Google Play, go to River Gauges, and add Northwest Branch at Kemp Mill 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 Northwest Branch at Kemp Mill gauge located?
The gauge is located in Montgomery County, Maryland at coordinates 39.0656°N, 77.0294°W. USGS site number: 01650500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.