Patapsco River at Hollofield, MD
River level and flood forecast · Baltimore County
The river is 9.0 ft below flood stage (11 ft).
Flow: 138 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Patapsco River at Hollofield to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 25 ft |
| Moderate flood stage | 19 ft |
| Flood stage | 11 ft |
| Action stage | 9 ft |
| Record crest (June 22, 1972) | 31.3 ft |
What floods at each level
From the National Weather Service, highest first.
- 25 ftWater covers the bridge at Hollofield Road, and crosses the railroad tracks in spots.
- 19 ftMultiple roads are flooded near Hollofield. Backwater flooding of Dogwood Run is also occurring.
- 11 ftHollofield Road begins to flood.
Highest crests on record
- 31.3 ft — June 22, 1972
- 22.8 ft — September 26, 1975
- 19.5 ft — August 1, 1933
- 15.88 ft — July 21, 1956
- 14.24 ft — July 31, 2016
Recent crests: 9.87 ft (June 3, 2018) · 14.24 ft (July 31, 2016) · 13.25 ft (April 30, 2014) · 10.85 ft (January 31, 2013) · 12.62 ft (September 7, 2011)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (PRHM2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.