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Potomac River near Washington DC (Little Falls) — water level right now

Montgomery County, Maryland · NWS gauge BRKM2
Loading the latest reading…
–
current stage (ft)
 
10
minor flood stage
 
28.1
record crest
set 1936-03-19
–
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 · 5
minor · 10
moderate · 12
major · 14
Flood stageLevel (ft)What it means
Major flood stage14extensive inundation and significant evacuations — a serious event
Moderate flood stage12some buildings and roads inundated; evacuations possible
Minor flood stage10low-lying roads and fields near the river start to flood
Action stage5water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
128.11936-03-19+18.1 above
226.881942-10-17+16.88 above
323.31937-04-28+13.3 above
422.031972-06-24+12.03 above
519.291996-01-21+9.29 above
617.991985-11-07+7.99 above
717.841996-09-08+7.84 above
817.61955-08-20+7.6 above
915.621937-10-30+5.62 above
1015.251932-05-14+5.25 above
1114.691936-02-27+4.69 above
1214.171952-04-29+4.17 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

Sligo Creek near Takoma Park 7 mi away · loading… Sligo Creek near Chillum / Riggs Rd. 8 mi away · loading… Northwest Branch Anacostia River at Brentwood MD 9 mi away · loading… Turkey Branch near Aspen Hill 9 mi away · loading… Northwest Branch at Kemp Mill 10 mi away · loading… Paint Branch near White Oak 10 mi away · loading…

Gauge details

NWS gauge IDBRKM2
USGS site01646500
CountyMontgomery
StateMaryland
NWS forecast officeSterling
River forecast centerMiddle Atlantic River Forecast Center
Coordinates38.95, -77.128
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 Potomac River near Washington DC (Little Falls)

Is Potomac River near Washington DC (Little 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 10 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Potomac River near Washington DC (Little Falls)?

major flood stage 14 ft, moderate flood stage 12 ft, minor flood stage 10 ft, action stage 5 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Potomac River near Washington DC (Little Falls)?

The highest crest on file at this gauge is 28.1 ft, reached on 1936-03-19 — that is 18.1 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.