Major Flood
20 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
12 ft
Action Stage
8 ft
What Floods at Each Level
20 ft
Both US 29 bridges over the Little Patuxent are flooded. Water covers several other roads and numerous trails and footbridges near the river.
18 ft
Water begins to cover the US 29 southbound bridge over the Little Patuxent in Columbia. Water approaches homes in a neighborhood just downstream.
15 ft
Floodwater approaches US 29 in Columbia and begins to cover Vollmerhausen Road near Savage.
13 ft
Water approaches the very end of Owen Brown Road.
12 ft
Water covers the bridge at South Entrance Road. Several trail bridges also begin to flood.
9.5 ft
Large parts of the Patuxent Branch Trail are completely flooded along with several trail bridges between Old Guilford Road and South Carlinda Avenue.
8 ft
Several parts of the Patuxent Branch Trail start to flood near the Little Patuxent River.
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 | 18.38 ft | 12,400 cfs |
| May 27, 2018 | 15.23 ft | 7,590 cfs |
| Jun 24, 2006 | 15.09 ft | 7,450 cfs |
About This Gauge
USGS Site
NWS LID
LPGM2
River
Little Patuxent River
County
Howard, MD
Coordinates
39.1678°N, 76.8514°W
Get Flood Alerts for Little Patuxent River
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 Little Patuxent River near Guilford?
The Little Patuxent River near Guilford gauge is maintained by USGS (site 01593500) 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 Little Patuxent River near Guilford?
The NWS-defined flood stage for Little Patuxent River near Guilford is 12 feet. Action stage begins at 8 feet. Moderate flooding starts at 16 feet, and major flooding at 20 feet.
How do I get alerts when Little Patuxent River rises?
Download StormCast free on Google Play, go to River Gauges, and add Little Patuxent River near Guilford 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 Little Patuxent River near Guilford gauge located?
The gauge is located in Howard County, Maryland at coordinates 39.1678°N, 76.8514°W. USGS site number: 01593500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.