Four Mile Run at Alexandria, VA
River level and flood forecast · Arlington County
Normal4.3 ftas of Mon 4:05 PM
The river is 7.7 ft below flood stage (12 ft).
Flow: 20 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 18 ft |
| Moderate flood stage | 15 ft |
| Flood stage | 12 ft |
| Action stage | 6 ft |
| Record crest (June 25, 2006) | 20.2 ft |
What floods at each level
From the National Weather Service, highest first.
- 18 ftSignificant flooding is occurring with structures and roads impacted on both sides.
- 15 ftWater approaches Arlington Mill Road on the south side of the stream. On the north side, water is approaching structures.
- 12 ftWater begins to flood the north bank, into grassy areas and parking lots.
- 6 ftFlooding of low portions of the Four Mile Run Trail begins.
Highest crests on record
- 20.2 ft — June 25, 2006
- 15.3 ft — July 8, 2019
- 13.07 ft — September 26, 1975
- 12.91 ft — July 7, 2020
- 12.53 ft — August 31, 2018
Recent crests: 11.54 ft (August 15, 2021) · 10.05 ft (July 9, 2021) · 10.74 ft (June 15, 2021) · 12.91 ft (July 7, 2020) · 15.3 ft (July 8, 2019)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (AFRV2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.