TornadoLiveMap

Patapsco River at Ellicott City — water level right now

Baltimore County, Maryland · NWS gauge ELPM2
Loading the latest reading…
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current stage (ft)
 
122.5
minor flood stage
 
124.78
record crest
set 2018-05-27
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flood status
official NWS category
Official NOAA forecast → Full US flood map →

Flood stages at this gauge

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

action · 121.5
minor · 122.5
moderate · 125
major · 127
Flood stageLevel (ft)What it means
Major flood stage127extensive inundation and significant evacuations — a serious event
Moderate flood stage125some buildings and roads inundated; evacuations possible
Minor flood stage122.5low-lying roads and fields near the river start to flood
Action stage121.5water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
1124.782018-05-27+2.28 above
2122.62018-06-04+0.1 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

Hudson Branch near Rogers Avenue at Ellicott City 1 mi away · loading… Patapsco River near Catonsville 2 mi away · loading… Dead Run near Catonsville 3 mi away · loading… Patapsco River at Hollofield 3 mi away · loading… Dead Run Tributary near Woodlawn 4 mi away · loading… Dead Run at Franklintown 5 mi away · loading…

Gauge details

NWS gauge IDELPM2
CountyBaltimore
StateMaryland
NWS forecast officeSterling
River forecast centerMiddle Atlantic River Forecast Center
Coordinates39.268, -76.794
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 Patapsco River at Ellicott City

Is Patapsco River at Ellicott City 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 122.5 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Patapsco River at Ellicott City?

major flood stage 127 ft, moderate flood stage 125 ft, minor flood stage 122.5 ft, action stage 121.5 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Patapsco River at Ellicott City?

The highest crest on file at this gauge is 124.78 ft, reached on 2018-05-27 — that is 2.28 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.