TidalMapLittle Gunpowder Falls at Laurel Brook, MD Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 01584500 sits on Little Gunpowder Falls and reads everything draining 36 square miles of the Gunpowder-Patapsco basin. Its datum sits 261 feet above sea level NAVD88. Daily flow has been on record here since 1927, 71 years of it.
Normal flows here
Little Gunpowder Falls runs a median of 34 cfs at this gauge across 71 years of record. March is the fullest month at a median 49 cfs, and September the leanest at 20 cfs. The highest daily mean on record is 2,800 cfs in 1933, and the lowest is 0.9 cfs in 2002.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 38 cfs | 112% |
| Feb | 44 cfs | 129% |
| Mar | 49 cfs | 144% |
| Apr | 47 cfs | 138% |
| May | 43 cfs | 126% |
| Jun | 34 cfs | 100% |
| Jul | 26 cfs | 76% |
| Aug | 22 cfs | 65% |
| Sep | 20 cfs | 59% |
| Oct | 24 cfs | 71% |
| Nov | 30 cfs | 87% |
| Dec | 34 cfs | 100% |
Medians from the USGS daily-statistics record, 1927 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
Little Gunpowder Falls reaches flood stage at this gauge at 7.5 feet. NWS starts watching it at 6 feet. The highest crest on record is 11.4 feet, in July 1984.
| Category | Gage height |
|---|---|
| Action | 6 ft |
| Minor flooding | 7.5 ft |
| When | Crest |
|---|---|
| July 1984 | 11.4 ft |
| August 1933 | 10.3 ft |
| June 1972 | 10.2 ft |
| January 1978 | 9.8 ft |
| June 1928 | 9.6 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge LBFM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
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Live streamflow and gage height: USGS gauge 01584500. Percentile context computed against the gauge's period of record. Not for navigation.
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