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 Howard Co.
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 Montgomery Co.
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 Prince Georges Co.
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 Harford Co.
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River Heights

Last Updated: Friday July 17th, 2026 03:31 AM EDT

Stage Color Key
No Flooding Near Flood Minor Flooding Mod Flooding Major Flooding Obs > 24hrs
Flood category not defined At/Below low water threshold Out of Service
Marker Key
Forecast Available Forecast Available Probability and Forecast Available Probability & Forecast Available Observations only Available Observations Only

Location HeightTrendForecastStatus
Patapsco River at Liberty Reservoir (MFEM2) 415.75ft No change in last hour Not Defined
Patapsco River at Woodstock (WOOM2) 235.93ft No change in last hour Not Defined
Patapsco River at Hollofield (PRHM2) 1.38ft No change in last hour  Normal
Patapsco River at Ellicott City (ELPM2) 113.88ft No change in last hour  Normal
Patapsco River near Catonsville (CTSM2) 10.21ft No change in last hour  Normal
Patapsco River near Elkridge at Patapsco State Park (ERDM2) 5.43ft No change in last hour  Normal
Patapsco River near Elkridge below Patapsco State Park (ELKM2) 7.54ft No change in last hour  Normal
NW Branch Patapsco River at Ft McHenry (BLTM2) 0.68ft No change in last hourNo change forecasted in next hour Normal
East Branch Herbert Run at Arbutus (EBHM2) 0.86ft No change in last hourNo change forecasted in next hour Normal
Maiden Choice Run at Wilkens Ave (MCRM2) 0.68ft No change in last hourNo change forecasted in next hourNot Defined
Gwynns Falls at Washington Blvd (WBGM2) 2.31ft No change in last hourNo change forecasted in next hour Normal
Susquehanna River at Conowingo (CNWM2) 9.47ft No change in last hourNo change forecasted in next hour Normal
Chesapeake Bay at Havre de Grace (HDGM2) 1.90ft No change in last hourNo change forecasted in next hour Normal
Chesapeake Bay at Tallchester Beach (TCBM2) 0.67ft No change in last hourNo change forecasted in next hour Normal
Severn River at Annapolis (APAM2) 0.88ft No change in last hourNo change forecasted in next hour Normal
Little Patuxent River at Guilford Rd (LPGM2) 1.50ft No change in last hourNo change forecasted in next hour Normal
Little Patuxent River at Savage (SAVM2) 2.79ft No change in last hourNo change forecasted in next hour Normal
Patuxent River at Brighton Dam (BGHM2) 1.61ft No change in last hourNo change forecasted in next hour Normal
Patuxent River at Duckett Dam (LPRM2) 4.28ft No change in last hourNo change forecasted in next hour Normal
Flood Test Location 1 - Big Sioux River, SD (WBWS2) 7.35ft No change in last hourNo change forecasted in next hour Normal
Flood Test Location 2 - James River, SD (SFDS2) 9.63ft No change in last hourNo change forecasted in next hour Normal
Flood Test Location 3 - Sabine River,TX (DWYT2) 23.27ft No change in last hourNo change forecasted in next hour Near Flood Stage

Data Courtesy of the National Water Prediction Service
Script Courtesy of Dennis at East Masonville Weather with mods by Saratoga-weather.org