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Hydrograph River at a Glance Download
Patapsco River at Ellicott City Stage (ft)Observed: 115.15 ft at 4:15AM Jul 14, 2019Observed: 115.24 ft at 5:15AM Jul 14, 2019Observed: 115.22 ft at 6:15AM Jul 14, 2019Observed: 115.23 ft at 7:15AM Jul 14, 2019Observed: 115.26 ft at 8:15AM Jul 14, 2019Observed: 115.27 ft at 9:15AM Jul 14, 2019Observed: 115.18 ft at 10:15AM Jul 14, 2019Observed: 115.14 ft at 11:15AM Jul 14, 2019Observed: 115.03 ft at 12:15PM Jul 14, 2019Observed: 114.91 ft at 1:15PM Jul 14, 2019Observed: 114.92 ft at 2:15PM Jul 14, 2019Observed: 114.8 ft at 3:15PM Jul 14, 2019Observed: 114.76 ft at 4:15PM Jul 14, 2019Observed: 114.76 ft at 5:15PM Jul 14, 2019Observed: 114.81 ft at 6:15PM Jul 14, 2019Observed: 114.84 ft at 7:15PM Jul 14, 2019Observed: 114.84 ft at 8:15PM Jul 14, 2019Observed: 114.92 ft at 9:15PM Jul 14, 2019Observed: 114.98 ft at 10:15PM Jul 14, 2019Observed: 115.01 ft at 11:15PM Jul 14, 2019Observed: 115.05 ft at 12:15AM Jul 15, 2019Observed: 115.07 ft at 12:55AM Jul 15, 2019Observed: 115.09 ft at 1:55AM Jul 15, 2019Observed: 115.15 ft at 2:55AM Jul 15, 2019Observed: 115.24 ft at 4:55AM Jul 15, 2019Observed: 115.27 ft at 5:55AM Jul 15, 2019Observed: 115.32 ft at 6:55AM Jul 15, 2019Observed: 115.33 ft at 7:55AM Jul 15, 2019Observed: 115.35 ft at 8:55AM Jul 15, 2019Observed: 115.38 ft at 9:55AM Jul 15, 2019Observed: 115.33 ft at 10:55AM Jul 15, 2019Observed: 115.26 ft at 11:55AM Jul 15, 2019Observed: 115.1 ft at 12:50PM Jul 15, 2019Observed: 115.08 ft at 12:55PM Jul 15, 2019Observed: 115.06 ft at 1:55PM Jul 15, 2019Observed: 115.02 ft at 2:55PM Jul 15, 2019Observed: 115.02 ft at 3:55PM Jul 15, 2019Observed: 114.97 ft at 4:55PM Jul 15, 2019Observed: 115.04 ft at 7:20PM Jul 15, 2019Observed: 115.11 ft at 9:20PM Jul 15, 2019Observed: 115.19 ft at 10:20PM Jul 15, 2019Observed: 115.26 ft at 11:20PM Jul 15, 2019Observed: 115.28 ft at 12:20AM Jul 16, 2019Observed: 115.29 ft at 1:20AM Jul 16, 2019Observed: 115.3 ft at 2:20AM Jul 16, 2019Observed: 115.31 ft at 3:20AM Jul 16, 2019Observed: 115.32 ft at 4:20AM Jul 16, 2019Observed: 115.35 ft at 5:20AM Jul 16, 2019Observed: 115.42 ft at 6:20AM Jul 16, 2019Observed: 115.46 ft at 7:20AM Jul 16, 2019Observed: 115.49 ft at 8:20AM Jul 16, 2019Observed: 115.49 ft at 9:20AM Jul 16, 2019Observed: 115.49 ft at 10:20AM Jul 16, 2019Observed: 115.44 ft at 11:10AM Jul 16, 2019Observed: 115.37 ft at 12:00PM Jul 16, 2019Observed: 115.22 ft at 1:00PM Jul 16, 2019Observed: 115.08 ft at 2:00PM Jul 16, 2019Observed: 114.91 ft at 2:45PM Jul 16, 2019Observed: 114.87 ft at 3:00PM Jul 16, 2019Observed: 114.83 ft at 3:25PM Jul 16, 2019Observed: 114.81 ft at 3:35PM Jul 16, 2019Observed: 114.8 ft at 4:35PM Jul 16, 2019Observed: 114.78 ft at 5:35PM Jul 16, 2019Observed: 114.79 ft at 6:35PM Jul 16, 2019Observed: 114.79 ft at 7:35PM Jul 16, 2019Observed: 114.83 ft at 8:35PM Jul 16, 2019Observed: 114.87 ft at 9:35PM Jul 16, 2019Observed: 114.93 ft at 11:35PM Jul 16, 2019Observed: 114.94 ft at 12:35AM Jul 17, 2019Observed: 114.96 ft at 1:35AM Jul 17, 2019Observed: 114.95 ft at 2:35AM Jul 17, 2019Observed: 114.91 ft at 3:35AM Jul 17, 2019Observed: 114.94 ft at 4:35AM Jul 17, 2019Observed: 114.94 ft at 5:35AM Jul 17, 2019Observed: 114.96 ft at 6:35AM Jul 17, 2019Observed: 115.01 ft at 7:35AM Jul 17, 2019Observed: 115.04 ft at 8:35AM Jul 17, 2019Observed: 115.03 ft at 9:35AM Jul 17, 2019Observed: 115 ft at 10:35AM Jul 17, 2019Observed: 114.89 ft at 11:35AM Jul 17, 2019Observed: 114.74 ft at 12:30PM Jul 17, 2019Observed: 114.75 ft at 12:35PM Jul 17, 2019Observed: 114.42 ft at 2:50PM Jul 17, 2019Observed: 114.34 ft at 4:50PM Jul 17, 2019Observed: 114.99 ft at 6:30PM Jul 17, 2019Observed: 115.1 ft at 6:50PM Jul 17, 2019Observed: 115.12 ft at 7:05PM Jul 17, 2019Observed: 115.2 ft at 7:25PM Jul 17, 2019Observed: 115.36 ft at 7:35PM Jul 17, 2019Observed: 115.51 ft at 7:55PM Jul 17, 2019Observed: 115.48 ft at 8:25PM Jul 17, 2019Observed: 115.64 ft at 8:50PM Jul 17, 2019Observed: 115.83 ft at 8:55PM Jul 17, 2019Observed: 116.03 ft at 9:10PM Jul 17, 2019Observed: 116.2 ft at 9:20PM Jul 17, 2019Observed: 116 ft at 9:25PM Jul 17, 2019Observed: 115.99 ft at 9:30PM Jul 17, 2019Observed: 116.15 ft at 9:35PM Jul 17, 2019Observed: 116.17 ft at 10:25PM Jul 17, 2019Observed: 116.14 ft at 11:25PM Jul 17, 2019Observed: 115.97 ft at 12:05AM Jul 18, 2019Observed: 115.9 ft at 12:25AM Jul 18, 2019Observed: 115.82 ft at 1:25AM Jul 18, 2019Observed: 115.89 ft at 2:25AM Jul 18, 2019Observed: 116.01 ft at 3:25AM Jul 18, 2019Observed: 116.02 ft at 4:05AM Jul 18, 2019Observed: 116.13 ft at 4:55AM Jul 18, 2019Observed: 115.95 ft at 5:30AM Jul 18, 2019Observed: 115.86 ft at 5:55AM Jul 18, 2019Observed: 116.09 ft at 6:20AM Jul 18, 2019Observed: 116.14 ft at 6:45AM Jul 18, 2019Highest Observation: 116.29 ft at 7:20AM Jul 18, 2019Highest Observation: 116.29 ft at 7:25AM Jul 18, 2019Observed: 116.27 ft at 7:45AM Jul 18, 2019Observed: 116.24 ft at 7:55AM Jul 18, 2019Observed: 116.22 ft at 8:45AM Jul 18, 2019Observed: 116.05 ft at 9:35AM Jul 18, 2019Observed: 116.03 ft at 9:40AM Jul 18, 2019Observed: 116.2 ft at 10:15AM Jul 18, 2019Observed: 116.13 ft at 10:40AM Jul 18, 2019Observed: 116.07 ft at 5:35PM Jul 18, 2019Observed: 115.91 ft at 6:30PM Jul 18, 2019Observed: 115.96 ft at 6:35PM Jul 18, 2019Observed: 115.98 ft at 7:10PM Jul 18, 2019Observed: 116.01 ft at 8:10PM Jul 18, 2019Observed: 115.99 ft at 9:00PM Jul 18, 2019Observed: 116.06 ft at 11:00PM Jul 18, 2019Observed: 116.12 ft at 11:50PM Jul 18, 2019Observed: 115.85 ft at 12:05AM Jul 19, 2019ELPM2(plotting HGIRR) Graph Created (3:54AM Jul 19, 2019)ObservedLatest observed value: 115.85 ft at 12:05 AM EDT 19-Jul-2019. Flood Stage is 122.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Patapsco River at Ellicott City. Only observed stages are available for this point.
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Flood Categories (in feet)
Major Flood Stage: 127
Moderate Flood Stage: 125
Flood Stage: 122.5
Action Stage: 121.5
Low Stage (in feet): 0

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

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Disclaimer
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)
Elevation
(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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(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(703) 996-2200
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Page last modified: 4-Mar-2019 11:30 PM
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