TidalMapFoster Branch near Joppatowne, 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 01585075 sits on Foster Branch and reads everything draining 1.8 square miles of the Gunpowder-Patapsco basin. Its datum sits essentially at sea level NAVD88. Daily flow has been on record here since 2016, 11 years of it.
Normal flows here
Foster Branch runs a median of 0.6 cfs at this gauge across 11 years of record. February is the fullest month at a median 1.3 cfs, and October the leanest at 0.3 cfs. The highest daily mean on record is 126 cfs in 2025, and the lowest is 0.0 cfs in 2017.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 0.8 cfs | 133% |
| Feb | 1.3 cfs | 218% |
| Mar | 1.0 cfs | 161% |
| Apr | 0.8 cfs | 130% |
| May | 0.7 cfs | 114% |
| Jun | 0.4 cfs | 69% |
| Jul | 0.4 cfs | 62% |
| Aug | 0.4 cfs | 72% |
| Sep | 0.3 cfs | 47% |
| Oct | 0.3 cfs | 44% |
| Nov | 0.4 cfs | 68% |
| Dec | 0.8 cfs | 143% |
Medians from the USGS daily-statistics record, 2016 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
NWS action stage at this gauge is 6 feet. The highest crest on record is 5.3 feet, in September 2021.
| Category | Gage height |
|---|---|
| Action | 6 ft |
| When | Crest |
|---|---|
| September 2021 | 5.3 ft |
| September 2021 | 4.5 ft |
| July 2018 | 4.4 ft |
| November 2018 | 4.3 ft |
| December 2015 | 4.2 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge JPAM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Wheel Creek near Abingdon, MD
- Plumtree Run near Bel Air, MD
- Honeygo Run near White Marsh, MD
- Bynum Run near Abingdon, MD
- Whitemarsh Run at White Marsh, MD
- Winters Run near Bel Air, MD
- Winters Run near Benson, MD
- James Run near Belcamp, MD
- Little Gunpowder Falls at Laurel Brook, MD
- Bynum Run at Bel Air, MD
- Long Green Creek at Glen Arm, MD
- Whitemarsh Run near Fullerton, MD
Live streamflow and gage height: USGS gauge 01585075. Percentile context computed against the gauge's period of record. Not for navigation.
Open Foster Branch near Joppatowne, MD on the live chart →
River pins, dam-release overlays and wadability lines live in the app, start a free TidalMap trial.