TidalMapSwan Creek at Swan Creek, 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 01580700 sits on Swan Creek and reads everything draining 13 square miles of the Gunpowder-Patapsco basin. Its datum sits 21 feet above sea level NAVD88. Daily flow has been on record here since 2008, 19 years of it.
Normal flows here
Swan Creek runs a median of 6.2 cfs at this gauge across 19 years of record. March is the fullest month at a median 16 cfs, and September the leanest at 2.2 cfs. The highest daily mean on record is 1,320 cfs in 2014, and the lowest is 0.1 cfs in 2008.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 12 cfs | 192% |
| Feb | 14 cfs | 224% |
| Mar | 16 cfs | 256% |
| Apr | 12 cfs | 200% |
| May | 8.6 cfs | 138% |
| Jun | 4.8 cfs | 77% |
| Jul | 2.7 cfs | 43% |
| Aug | 2.8 cfs | 45% |
| Sep | 2.2 cfs | 36% |
| Oct | 3.2 cfs | 51% |
| Nov | 4.5 cfs | 72% |
| Dec | 10 cfs | 160% |
Medians from the USGS daily-statistics record, 2008 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
Swan Creek reaches flood stage at this gauge at 14 feet. NWS starts watching it at 12 feet. The highest crest on record is 11.6 feet, in April 2014.
| Category | Gage height |
|---|---|
| Action | 12 ft |
| Minor flooding | 14 ft |
| Moderate flooding | 18 ft |
| Major flooding | 20 ft |
| When | Crest |
|---|---|
| April 2014 | 11.6 ft |
| September 2021 | 10 ft |
| August 2011 | 9.1 ft |
| September 2021 | 9.1 ft |
| August 2017 | 9 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge SWNM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Deer Creek near Darlington, MD
- James Run near Belcamp, MD
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Live streamflow and gage height: USGS gauge 01580700. Percentile context computed against the gauge's period of record. Not for navigation.
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