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Hydrograph River at a Glance Download
Hudson Branch near Rogers Avenue at Ellicott City Stage (ft)Observed: 253.63 ft at 7:25AM Aug 20, 2019Observed: 253.65 ft at 8:25AM Aug 20, 2019Observed: 253.67 ft at 9:25AM Aug 20, 2019Observed: 253.7 ft at 10:25AM Aug 20, 2019Observed: 253.73 ft at 12:25PM Aug 20, 2019Observed: 253.82 ft at 1:25PM Aug 20, 2019Observed: 253.82 ft at 2:25PM Aug 20, 2019Highest Observation: 253.85 ft at 3:25PM Aug 20, 2019Observed: 253.79 ft at 4:25PM Aug 20, 2019Observed: 253.76 ft at 5:25PM Aug 20, 2019Observed: 253.73 ft at 6:25PM Aug 20, 2019Observed: 253.69 ft at 7:25PM Aug 20, 2019Observed: 253.67 ft at 8:25PM Aug 20, 2019Observed: 253.66 ft at 9:25PM Aug 20, 2019Observed: 253.64 ft at 11:25PM Aug 20, 2019Observed: 253.61 ft at 6:25AM Aug 21, 2019Observed: 253.61 ft at 7:25AM Aug 21, 2019Observed: 253.63 ft at 8:25AM Aug 21, 2019ECHM2(plotting HGIRR) Graph Created (8:55AM Aug 21, 2019)ObservedLatest observed value: 253.63 ft at 8:25 AM EDT 21-Aug-2019. Flood Stage is 258 ft
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Tabular Data (UTC)
Tabular Data (EDT)
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Datum: Not Available
NOTE: Forecasts are not available for the Hudson Branch near Rogers Avenue at Ellicott City. Only observed stages are available for this point.
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Flood Categories (in feet)
Major Flood Stage: 260
Moderate Flood Stage: 259
Flood Stage: 258
Action Stage: 257
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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Gauge LocationGauge Map Marker
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.
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260 Major flooding is occurring with homes and roads flooded on Upper Main Street. This water will likely continue flowing down Main Street, causing additional damage.
259 Overbank flooding approaches homes on Upper Main Street in Ellicott City.
258 Water exceeds the banks of the stream, and begins to flow onto Main Street near Rogers Avenue.
257 Water reaches the underside of an access road bridge near Main Street and Rogers Avenue.
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Latitude: 39.268611° N, Longitude: 76.810000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 258 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
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: 1-Mar-2019 12:35 AM
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