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Susquehanna River at Conowingo Dam — water level right now

Cecil County, Maryland · NWS gauge CNWM2
Loading the latest reading…
–
current stage (ft)
 
23.5
minor flood stage
 
36.83
record crest
set 1972-06-24
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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 · 21.5
minor · 23.5
moderate · 24.8
major · 28.5
Flood stageLevel (ft)What it means
Major flood stage28.5extensive inundation and significant evacuations — a serious event
Moderate flood stage24.8some buildings and roads inundated; evacuations possible
Minor flood stage23.5low-lying roads and fields near the river start to flood
Action stage21.5water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
136.831972-06-24+13.33 above
234.181996-01-20+10.68 above
332.412011-09-09+8.91 above
430.921975-09-27+7.42 above
530.072004-09-19+6.57 above
628.081984-02-16+4.58 above
728.061993-04-02+4.56 above
828.041979-03-07+4.54 above
927.312006-06-29+3.81 above
1026.72005-04-04+3.2 above
1126.41970-02-04+2.9 above
1226.171986-03-16+2.67 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

Deer Creek (MD) near Darlington 3 mi away · loading… Chesapeake Bay at Havre de Grace (IN MLLW) 9 mi away · loading… Swan Creek at Swan Creek 9 mi away · loading… Bynum Run at Bel Air 12 mi away · loading… Deer Creek (MD) at Rocks State Park 12 mi away · loading… James Run near Belcamp 12 mi away · loading…

Gauge details

NWS gauge IDCNWM2
USGS site01578310
CountyCecil
StateMaryland
NWS forecast officeSterling
River forecast centerMiddle Atlantic River Forecast Center
Coordinates39.658, -76.174
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 Susquehanna River at Conowingo Dam

Is Susquehanna River at Conowingo Dam 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 23.5 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Susquehanna River at Conowingo Dam?

major flood stage 28.5 ft, moderate flood stage 24.8 ft, minor flood stage 23.5 ft, action stage 21.5 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Susquehanna River at Conowingo Dam?

The highest crest on file at this gauge is 36.83 ft, reached on 1972-06-24 — that is 13.33 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.