TidalMapBroad Run near Leesburg, VA 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 01644280 sits on Broad Run and reads everything draining 76 square miles of the Middle Potomac-Catoctin basin. Its datum sits 194 feet above sea level NAVD88. Daily flow has been on record here since 2002, 25 years of it.
Where this gauge sits in the drainage
No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from Potomac River near Wash, Dc Little Falls Pump Sta at 11,560 square miles, so what passes this gauge is about 1% of the water measured there.
Normal flows here
Broad Run runs a median of 50 cfs at this gauge across 25 years of record. February is the fullest month at a median 75 cfs, and September the leanest at 23 cfs. The highest daily mean on record is 10,300 cfs in 2008, and the lowest is 1.3 cfs in 2002.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 58 cfs | 116% |
| Feb | 75 cfs | 150% |
| Mar | 70 cfs | 140% |
| Apr | 56 cfs | 111% |
| May | 57 cfs | 114% |
| Jun | 42 cfs | 84% |
| Jul | 33 cfs | 66% |
| Aug | 27 cfs | 54% |
| Sep | 23 cfs | 46% |
| Oct | 29 cfs | 58% |
| Nov | 41 cfs | 82% |
| Dec | 61 cfs | 122% |
Medians from the USGS daily-statistics record, 2002 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
Broad Run reaches flood stage at this gauge at 12 feet. NWS starts watching it at 10 feet. The highest crest on record is 13.3 feet, in May 2008.
| Category | Gage height |
|---|---|
| Action | 10 ft |
| Minor flooding | 12 ft |
| Moderate flooding | 15 ft |
| Major flooding | 18 ft |
| When | Crest |
|---|---|
| May 2008 | 13.3 ft |
| January 2013 | 11.3 ft |
| May 2014 | 11.2 ft |
| September 2011 | 10.8 ft |
| October 2012 | 10.8 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge LRGV2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Potomac River at Edwards Ferry near Poolesville,md
- Seneca Creek at Dawsonville, MD
- Goose Creek near Leesburg, VA
- Snakeden Branch above Lake Audubon at Reston, VA
- Limestone Branch near Leesburg, VA
- Flatlick Branch above Frog Branch at Chantilly, VA
- South Fork Little Difficult Run above Mouth near Vienna, VA
- Difficult Run above Fox Lake near Fairfax, VA
- Difficult Run near Great Falls, VA
- Tenmile Creek near Boyds, MD
- Tenmile Creek near Clarksburg, MD
- Cabin Branch near Boyds, MD
Live streamflow and gage height: USGS gauge 01644280. Percentile context computed against the gauge's period of record. Not for navigation.
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