Major 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.
Moderate Flood
19 ft
Minor Flood
11 ft
Action Stage
9 ft
What Floods at Each Level
25 ft
Water covers the bridge at Hollofield Road, and crosses the railroad tracks in spots.
19 ft
Multiple roads are flooded near Hollofield. Backwater flooding of Dogwood Run is also occurring.
11 ft
Hollofield 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 |
|---|---|---|
| Jun 21, 1972 | 31.3 ft | 80,600 cfs |
| Sep 25, 1975 | 22.8 ft | 46,500 cfs |
| Jul 31, 1933 | 19.5 ft | 36,000 cfs |
About This Gauge
USGS Site
NWS LID
PRHM2
River
Patapsco River
County
Baltimore, MD
Coordinates
39.3103°N, 76.7925°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 at Hollofield?
The Patapsco River at Hollofield gauge is maintained by USGS (site 01589000) 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 at Hollofield?
The NWS-defined flood stage for Patapsco River at Hollofield is 11 feet. Action stage begins at 9 feet. Moderate flooding starts at 19 feet, and major flooding at 25 feet.
How do I get alerts when Patapsco River rises?
Download StormCast free on Google Play, go to River Gauges, and add Patapsco River at Hollofield 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 at Hollofield gauge located?
The gauge is located in Baltimore County, Maryland at coordinates 39.3103°N, 76.7925°W. USGS site number: 01589000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Patapsco River
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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.