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Hydrograph River at a Glance Download
Patapsco River at Ellicott City Stage (ft)ELPM2(plotting HGIRR) Graph Created (11:40AM Jan 22, 2021)Flood Stage is 122.5 ft
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Datum: Not Available
NOTE: Stage may be affected by ice.

NOTE: Forecasts are not available for the Patapsco River at Ellicott City. Only observed stages are available for this point.

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Upstream Gauge - at Hollofield Upstream Gauge Downstream Gauge Downstream Gauge - near Catonsville
Flood Categories (in feet)
Major Flood Stage: 127
Moderate Flood Stage: 125
Flood Stage: 122.5
Action Stage: 121.5
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
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127 Major flooding is occurring in lower Old Town Ellicott City. The flooding will be even more significant if local rainfall has occurred, causing additional backwater flooding.
125 Main Street in Ellicott City is flooded near the railroad bridge with water either approaching or entering buildings. Backwater flooding may be occurring further upstream if local rainfall has occurred.
124 Main Street in Ellicott City begins to flood both near 8000 Main Street and near the intersection of Main Street and Maryland Avenue.
122 Water exceeds the banks and approaches an access road adjacent to 8000 Main Street in Ellicott City.
About This Location Collapse

Latitude: 39.268333° N, Longitude: 76.793889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 122.5 ft  
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available  
NGVD 29 Not Available Not Available  
MSL Not Available Not Available  
Other Not Available Not Available  
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NWS Information
National Weather Service
(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(703) 996-2200
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Page last modified: 30-Oct-2020 4:10 PM
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