TornadoLiveMap

Difficult Run near Great Falls — water level right now

Fairfax County, Virginia · NWS gauge GFLV2
Loading the latest reading…
–
current stage (ft)
 
11
minor flood stage
 
21.4
record crest
set 1972-06-22
–
flood status
official NWS category
Official NOAA forecast → USGS data → Full US flood map →

Flood stages at this gauge

Where the water stands right now against the four official thresholds:

action · 9
minor · 11
moderate · 13
major · 20
Flood stageLevel (ft)What it means
Major flood stage20extensive inundation and significant evacuations — a serious event
Moderate flood stage13some buildings and roads inundated; evacuations possible
Minor flood stage11low-lying roads and fields near the river start to flood
Action stage9water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
121.41972-06-22+10.4 above
217.542011-09-08+6.54 above
316.622008-09-06+5.62 above
415.012006-06-26+4.01 above
513.821975-09-26+2.82 above
613.311989-05-06+2.31 above
713.181967-08-25+2.18 above
812.992018-07-22+1.99 above
912.952019-07-08+1.95 above
1012.572014-04-30+1.57 above
1112.382008-05-12+1.38 above
1212.232014-05-16+1.23 above

Historic crests recorded at this gauge by the National Weather Service — the 12 highest on file.

Where this gauge is

The marker is this gauge; nearby gauges load live and are clickable.

Nearby river gauges

Difficult Run at Browns Mill Road / Wolf Trap 3 mi away · loading… Dead Run near McLean 4 mi away · loading… Four Mile Run at HWY 29 8 mi away · loading… Holmes Run at Fairview Lake 8 mi away · loading… Tripps Run at Falls Church, VA 8 mi away · loading… Accotink Creek at Woodburn Road / Strathmeade Springs 9 mi away · loading…

Gauge details

NWS gauge IDGFLV2
USGS site01646000
CountyFairfax
StateVirginia
NWS forecast officeSterling
River forecast centerMiddle Atlantic River Forecast Center
Coordinates38.976, -77.246
Time zoneEST5EDT
Turn Around, Don't Drown. Six inches of moving water can knock you off your feet and twelve inches can float a car. Never drive around barricades or into water of unknown depth — most flood deaths happen in vehicles.

Questions about Difficult Run near Great Falls

Is Difficult Run near Great Falls flooding right now?

The live reading at the top of this page answers that: the gauge is compared against its official NWS flood stages every 15 minutes. Minor flooding at this gauge begins at 11 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Difficult Run near Great Falls?

major flood stage 20 ft, moderate flood stage 13 ft, minor flood stage 11 ft, action stage 9 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Difficult Run near Great Falls?

The highest crest on file at this gauge is 21.4 ft, reached on 1972-06-22 — that is 10.4 ft above minor flood stage. The full list of the highest crests is in the table on this page.

Where does this data come from?

From the NOAA National Water Prediction Service, the official U.S. river gauge network — a U.S. government work in the public domain. Live stage is refreshed every 15 minutes; flood thresholds and historic crests are refreshed monthly. For life-safety decisions follow NWS Sterling and local emergency management.