Moderate Flood
25 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.
Minor Flood
20 ft
Action Stage
18 ft
What Floods at Each Level
25 ft
Significant flooding is occurring along the river.
20 ft
River Road begins to flood.
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 |
|---|---|---|
| May 27, 2018 | 27.15 ft | 23,000 cfs |
| Jul 30, 2016 | 27.14 ft | 28,394 cfs |
| Sep 7, 2011 | 25.17 ft | -9,999 cfs |
About This Gauge
USGS Site
NWS LID
CTSM2
River
Patapsco River
County
Baltimore, MD
Coordinates
39.2514°N, 76.7639°W
Get Flood Alerts for Patapsco 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 Patapsco River near Catonsville?
The Patapsco River near Catonsville gauge is maintained by USGS (site 01589025) 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 Patapsco River near Catonsville?
The NWS-defined flood stage for Patapsco River near Catonsville is 20 feet. Action stage begins at 18 feet. Moderate flooding starts at 25 feet, and major flooding at N/A feet.
How do I get alerts when Patapsco River rises?
Download StormCast free on Google Play, go to River Gauges, and add Patapsco River near Catonsville 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 Patapsco River near Catonsville gauge located?
The gauge is located in Baltimore County, Maryland at coordinates 39.2514°N, 76.7639°W. USGS site number: 01589025. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Patapsco River
On This River
Upstream: Patapsco River at Ellicott City
Downstream: Patapsco River near Elkridge at Patapsco Valley State Park
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.