Gunpowder Falls at Glencoe, MD
River level and flood forecast · Baltimore County
The river is 6.0 ft below flood stage (7 ft).
Flow: 91 cubic feet per second (USGS).
Normal for October 13.
Usual for October 13: 89 to 202 cubic feet per second (the middle half of 46 years).
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 Gunpowder Falls at Glencoe to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 12 ft |
| Moderate flood stage | 10 ft |
| Flood stage | 7 ft |
| Action stage | 5 ft |
| Record crest (September 8, 2011) | 16.5 ft |
What floods at each level
From the National Weather Service, highest first.
- 12 ftSeveral feet of water is in buildings off Sparks Road, with numerous roads flooded in the area.
- 10.5 ftPortions of the NC RR Trail begin to flood near Glencoe.
- 10 ftWater enters buildings off Sparks Road, and portions of Home Road begin to flood.
- 9 ftSparks Road begins to flood.
- 7 ftPortions of Upper Glencoe Road and Lower Glencoe Road begin to flood.
Highest crests on record
- 16.5 ft — September 8, 2011
- 15.3 ft — September 6, 1979
- 14.56 ft — July 25, 2018
- 13.72 ft — March 4, 1994
- 13.2 ft — February 12, 1985
Recent crests: 8.33 ft (August 1, 2025) · 10.21 ft (January 10, 2024) · 8.92 ft (December 18, 2023) · 7.46 ft (September 23, 2021) · 7.9 ft (September 2, 2021)
Highest flow on record
13,000 cubic feet per second — September 8, 2011. From the USGS's yearly peaks since 1978.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (GCEM2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.