Difficult Run near Great Falls

Last updated: Jul 20, 2025, 11:26 PM UTC
No watches, warnings or advisories are in effect for this area.

Flood Impacts 🅘

  • 20 - Water approaches structures near the stream.
  • 13 - Water reaches the intersection of Leigh Mill Road and Kelso Road.
  • 11 - Leigh Mill Road floods near Difficult Run.

Gauge Info

Coordinates 38.9758, -77.2461
RFC MARFC
State VA
WFO LWX
County Fairfax
Data Provider(s)
US Geological Survey USGS--Water Resources of the United States
USGS 01646000

Gauge Location

Recent Crests

1. 9.71 ft on 09-01-2021
2. 12.95 ft on 07-08-2019
3. 11.08 ft on 08-01-2018
4. 12.99 ft on 07-22-2018
5. 12.23 ft on 05-16-2014

Historic Crests

1. 21.40 ft on 06-22-1972
2. 17.54 ft on 09-08-2011
3. 16.62 ft on 09-06-2008
4. 15.01 ft on 06-26-2006
5. 13.82 ft on 09-26-1975

Vertical Datum Table

type NAVD88
major Flooding 170.94 ft
moderate Flooding 163.94 ft
minor Flooding 161.94 ft
action 159.94 ft
Latest Value 154.07 ft
Gauge Zero 150.94 ft

Gauge Photos

No Images Found

Probability Information

No Images Available

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

WFO Information

Weather Forecast Office
(Baltimore/Washington) Sterling
43858 Weather Service Rd.
Sterling, VA 20166
Official Homepage