TidalMapFourmile Run at Alexandria, 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 01652500 sits on Fourmile Run and reads everything draining 13 square miles of the Middle Potomac-Anacostia-Occoquan basin. Its datum sits 28 feet above sea level NAVD88. Daily flow has been on record here since 1952, 51 years of it.
Where this gauge sits in the drainage
One gauged site sits upstream of here. The closest is Four Mile Run at Hwy 29 at Falls Church, VA, reading 0.9 square miles. This gauge adds the 12 square miles that drain in between.
Normal flows here
Fourmile Run runs a median of 7.0 cfs at this gauge across 51 years of record. March is the fullest month at a median 9.9 cfs, and September the leanest at 4.5 cfs. The highest daily mean on record is 1,280 cfs in 2006, and the lowest is 0.7 cfs in 1957.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 7.5 cfs | 108% |
| Feb | 8.5 cfs | 122% |
| Mar | 9.9 cfs | 142% |
| Apr | 9.1 cfs | 131% |
| May | 8.0 cfs | 115% |
| Jun | 6.9 cfs | 99% |
| Jul | 6.3 cfs | 91% |
| Aug | 5.4 cfs | 78% |
| Sep | 4.5 cfs | 65% |
| Oct | 4.5 cfs | 65% |
| Nov | 5.7 cfs | 82% |
| Dec | 6.6 cfs | 95% |
Medians from the USGS daily-statistics record, 1952 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
Fourmile Run reaches flood stage at this gauge at 12 feet. NWS starts watching it at 6 feet. The highest crest on record is 20.2 feet, in June 2006.
| Category | Gage height |
|---|---|
| Action | 6 ft |
| Minor flooding | 12 ft |
| Moderate flooding | 15 ft |
| Major flooding | 18 ft |
| When | Crest |
|---|---|
| June 2006 | 20.2 ft |
| July 2019 | 15.3 ft |
| September 1975 | 13.1 ft |
| July 2020 | 12.9 ft |
| August 2018 | 12.5 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge AFRV2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Cameron Run at Alexandria, VA
- Four Mile Run at Hwy 29 at Falls Church, VA
- Tripps Run at Falls Church, VA
- Potomac River near Wash, Dc Little Falls Pump Sta
- Accotink Creek at Keene Mill Rd at Springfield, VA
- Accotink Creek near Annandale, VA
- Dead Run at Whann Avenue near Mclean, VA
- Long Branch near Annandale, VA
- Sligo Creek near Takoma Park, MD
- Northwest Branch Anacostia River at Brentwood, MD
- Beaverdam Creek near Cheverly, MD
- Long Branch at Olley Lane near Fairfax, VA
Live streamflow and gage height: USGS gauge 01652500. Percentile context computed against the gauge's period of record. Not for navigation.
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