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Patuxent River near Unity — water level right now

Montgomery County, Maryland · NWS gauge PRUM2
Loading the latest reading…
–
current stage (ft)
 
8
minor flood stage
 
18.6
record crest
set 1971-09-11
–
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 · 7
minor · 8
moderate · 11
major · 18
Flood stageLevel (ft)What it means
Major flood stage18extensive inundation and significant evacuations — a serious event
Moderate flood stage11some buildings and roads inundated; evacuations possible
Minor flood stage8low-lying roads and fields near the river start to flood
Action stage7water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
118.61971-09-11+10.6 above
216.11972-06-22+8.1 above
314.351956-07-21+6.35 above
413.581945-08-01+5.58 above
512.691975-09-26+4.69 above
611.721979-10-01+3.72 above
710.541989-05-06+2.54 above
810.521996-09-06+2.52 above
910.492013-01-31+2.49 above
1010.362006-06-27+2.36 above
1110.312006-11-16+2.31 above
1210.022003-12-11+2.02 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

Patuxent River below Brighton Dam 4 mi away · loading… Hawlings River near Sandy Spring 5 mi away · loading… Little Seneca Creek Tributary at Brink, MD 10 mi away · loading… Little Patuxent River below Lake Kittamaqundi 11 mi away · loading… LITTLE SENECA CREEK TRIBUTARY NEAR CLARKSBURG, MD 11 mi away · loading… Paint Branch Tributary Near Colesville, MD 11 mi away · loading…

Gauge details

NWS gauge IDPRUM2
USGS site01591000
CountyMontgomery
StateMaryland
NWS forecast officeSterling
River forecast centerMiddle Atlantic River Forecast Center
Coordinates39.238, -77.056
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 Patuxent River near Unity

Is Patuxent River near Unity 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 8 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Patuxent River near Unity?

major flood stage 18 ft, moderate flood stage 11 ft, minor flood stage 8 ft, action stage 7 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Patuxent River near Unity?

The highest crest on file at this gauge is 18.6 ft, reached on 1971-09-11 — that is 10.6 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.