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Maryland River Gauges

132 river gauges with NWS flood stage data in Maryland. Live water levels from USGS, updated every 15 minutes. Get push alerts when rivers rise with StormCast.

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All Maryland Gauges by River

LITTLE SENECA CREEK TRIBUTARY

LITTLE SENECA CREEK TRIBUTARY NEAR CLARKSBURG, MD Montgomery County

Antietam Creek

Antietam Creek near Sharpsburg Washington County · Flood stage: 8 ft Antietam Creek near Waynesboro Washington County · Flood stage: 6.5 ft

Atlantic Coast

Atlantic Coast at Isle of Wight Bay Worcester County · Flood stage: 3.5 ft Atlantic Coast near OCEAN CITY INLET (IN MLLW) Worcester County · Flood stage: 4 ft

Back Branch

Back Branch near Upper Marlboro / Brown Landfill Prince Georges County

Baisman Run

Baisman Run at Broadmoor Baltimore County · Flood stage: 4 ft

Beaver Run

Beaver Run near Finksburg Carroll County · Flood stage: 5 ft

Beaverdam Run

Beaverdam Run at Cockeysville Baltimore County · Flood stage: 9 ft

Beetree Run

Beetree Run near Bentley Springs Baltimore County · Flood stage: 5.5 ft

Bennett Creek

Bennett Creek at Park Mills Frederick County · Flood stage: 11 ft

Big Elk Creek

Big Elk Creek at Elk Mills Cecil County · Flood stage: 9 ft

Big Pipe Creek

Big Pipe Creek at Bruceville Carroll County · Flood stage: 8 ft

Bynum Run

Bynum Run at Bel Air Harford County · Flood stage: 9 ft

Cabin Branch

Cabin Branch near Upper Marlboro / Ritchie Marlboro Road Prince Georges County

Catoctin Creek

Catoctin Creek Near Middletown Frederick County · Flood stage: 15 ft

Chesapeake Bay

Chesapeake Bay above Little Annemessex River at Crisfield MD (MLLW) Somerset County · Flood stage: 3.5 ft Chesapeake Bay at Bishops Head (IN MLLW) Dorchester County · Flood stage: 3.2 ft Chesapeake Bay at Cambridge (IN MLLW) Dorchester County · Flood stage: 3.5 ft Chesapeake Bay at Havre de Grace (IN MLLW) Harford County · Flood stage: 4 ft Chesapeake Bay at Tolchester Beach (IN MLLW) Kent County · Flood stage: 3.5 ft

Chesapeake and Delaware Canal

Chesapeake and Delaware Canal at Chesapeake City (IN MLLW) Cecil County · Flood stage: 5.5 ft

Collington Branch

Collington Branch at Mitchellville Prince Georges County · Flood stage: 9 ft Collington Branch near Upper Marlboro / Leeland Road Prince Georges County · Flood stage: 12 ft

Conococheague Creek

Conococheague Creek at Fairview Washington County · Flood stage: 10 ft

Cranberry Branch

Cranberry Branch near Westminster Carroll County · Flood stage: 5 ft

Dead Run

Dead Run at Franklintown Baltimore County · Flood stage: 10 ft Dead Run at Woodlawn Baltimore County · Flood stage: 9 ft Dead Run near Catonsville Baltimore County · Flood stage: 9 ft

Dead Run Tributary

Dead Run Tributary at Woodlawn Baltimore County · Flood stage: 10 ft Dead Run Tributary near Woodlawn Baltimore County · Flood stage: 8.5 ft

Deer Creek (MD)

Deer Creek (MD) at Rocks State Park Harford County · Flood stage: 11 ft Deer Creek (MD) near Darlington Harford County · Flood stage: 10 ft

East Branch Herbert Run

East Branch Herbert Run at Arbutus Baltimore County · Flood stage: 7 ft

Eastern Bay

Eastern Bay at Claiborne (IN MLLW) Talbot County · Flood stage: 3.4 ft

Foster Branch

Foster Branch near Joppatowne Harford County

Georges Creek

Georges Creek near Franklin/Westernport Allegany County · Flood stage: 9.1 ft

Georges Run

Georges Run near Beckleysville Baltimore County · Flood stage: 7 ft

Grave Run

Grave Run near Beckleysville Baltimore County · Flood stage: 6 ft

Gunpowder Falls

Gunpowder Falls at Glencoe Baltimore County · Flood stage: 7 ft Gunpowder Falls at Hoffmanville Baltimore County · Flood stage: 6 ft Gunpowder Falls near Parkton Baltimore County · Flood stage: 10 ft

Gwynns Falls

Gwynns Falls at Glyndon Baltimore County · Flood stage: 5 ft Gwynns Falls at Villa Nova Baltimore County · Flood stage: 11 ft Gwynns Falls at Washington Blvd in Baltimore Baltimore City County · Flood stage: 13 ft Gwynns Falls near Delight Baltimore County · Flood stage: 9.5 ft

Hawlings River

Hawlings River near Sandy Spring Montgomery County · Flood stage: 6.5 ft

Honeygo Run

Honeygo Run near White Marsh Baltimore County · Flood stage: 6 ft

Hudson Branch

Hudson Branch near Rogers Avenue at Ellicott City Howard County · Flood stage: 258 ft

James Run

James Run near Belcamp Harford County · Flood stage: 9 ft

Jones Falls

Jones Falls at Baltimore Harbor Baltimore City County · Flood stage: 3 ft Jones Falls at Sorrento Baltimore County · Flood stage: 17 ft

Licking Creek

Licking Creek at Pecktonville Washington County · Flood stage: 10 ft

Little Falls

Little Falls at Blue Mount Baltimore County · Flood stage: 8.5 ft

Little Gunpowder Falls

Little Gunpowder Falls at Laurel Brook Baltimore County · Flood stage: 7.5 ft

Little Patuxent River

Little Patuxent River at Allview Howard County · Flood stage: 280 ft Little Patuxent River below Lake Kittamaqundi Howard County · Flood stage: 298.5 ft Little Patuxent River near Guilford Howard County · Flood stage: 12 ft Little Patuxent River near Savage Howard County · Flood stage: 10 ft

Little Seneca Creek Tributary

Little Seneca Creek Tributary at Brink, MD Montgomery County Little Seneca Creek Tributary Near Germantown, MD Montgomery County

Long Green Creek

Long Green Creek at Glen Arm Baltimore County · Flood stage: 7 ft

Long Quarter Branch

Long Quarter Branch at Lutherville Baltimore County · Flood stage: 8.5 ft

Marsh Run

Marsh Run at Grimes Washington County · Flood stage: 6 ft

Mattawoman Creek

Mattawoman Creek near Pomonkey Charles County · Flood stage: 7 ft

Minebank Run

Minebank Run near Glen Arm Baltimore County · Flood stage: 10 ft

Monocacy River

Monocacy River at Bridgeport Frederick County · Flood stage: 13 ft Monocacy River at Monocacy Blvd. in Frederick Frederick County · Flood stage: 17.8 ft Monocacy River near Frederick at Interstate 70 Frederick County · Flood stage: 15 ft

Morgan Run

Morgan Run near Louisville Carroll County · Flood stage: 16 ft

Nassawango Creek

Nassawango Creek near Snow Hill Worcester County · Flood stage: 6.5 ft

North Branch Potomac River

North Branch Potomac River at Cumberland Allegany County · Flood stage: 17 ft North Branch Potomac River at Kitzmiller Garrett County · Flood stage: 9 ft North Branch Potomac River at Luke Allegany County · Flood stage: 10.5 ft North Branch Potomac River at Steyer Garrett County · Flood stage: 9 ft

Northeast Branch Anacostia River

Northeast Branch Anacostia River at Riverdale Prince Georges County · Flood stage: 8 ft

Northwest Branch

Northwest Branch at Kemp Mill Montgomery County · Flood stage: 9 ft

Northwest Branch Anacostia River

Northwest Branch Anacostia River at Brentwood MD Prince Georges County · Flood stage: 10 ft

Northwest Branch Patapsco River

Northwest Branch Patapsco River at Baltimore/Fort McHenry (IN MLLW) Baltimore City County · Flood stage: 3.4 ft

Other

Cooperative Oxford Laboratory (IN MLLW) Talbot County · Flood stage: 3.5 ft

Paint Branch

Paint Branch near White Oak Montgomery County · Flood stage: 12 ft

Paint Branch Tributary

Paint Branch Tributary Near Colesville, MD Montgomery County · Flood stage: 13 ft

Patapsco River

Patapsco River at Ellicott City Baltimore County · Flood stage: 122.5 ft Patapsco River at Hollofield Baltimore County · Flood stage: 11 ft Patapsco River near Catonsville Baltimore County · Flood stage: 20 ft Patapsco River near Elkridge at Patapsco Valley State Park Baltimore County · Flood stage: 15 ft Patapsco River near Elkridge below Patapsco Valley State Park Howard County · Flood stage: 16 ft

Patuxent River

Patuxent River at Solomons Island (IN MLLW) Calvert County · Flood stage: 3 ft Patuxent River below Brighton Dam Montgomery County · Flood stage: 9 ft Patuxent River below Duckett Dam near Laurel Prince Georges County · Flood stage: 9.5 ft Patuxent River near Bowie Anne Arundel County · Flood stage: 19 ft Patuxent River near Unity Montgomery County · Flood stage: 8 ft

Piney Run

Piney Run at Dover Baltimore County · Flood stage: 8.5 ft

Piscataway Creek

Piscataway Creek at Piscataway Prince Georges County · Flood stage: 11.5 ft

Plumtree Run

Plumtree Run near Bel Air Harford County · Flood stage: 6 ft

Potomac River

Potomac River at Edwards Ferry Montgomery County · Flood stage: 15 ft Potomac River at Hancock Washington County · Flood stage: 25 ft Potomac River at Paw Paw Allegany County · Flood stage: 25 ft Potomac River at Point of Rocks Frederick County · Flood stage: 16 ft Potomac River near Washington DC (Little Falls) Montgomery County · Flood stage: 10 ft

Savage River

Savage River near Bloomington Garrett County

Sawmill Creek

Sawmill Creek at Glen Burnie Anne Arundel County · Flood stage: 5 ft

Scotts Level Branch

Scotts Level Branch at Rockdale Baltimore County · Flood stage: 7 ft

Seneca Creek

Seneca Creek at Dawsonville Montgomery County · Flood stage: 7.5 ft

Severn River

Severn River at Annapolis (IN MLLW) Anne Arundel County · Flood stage: 2.6 ft

Sideling Hill Creek

Sideling Hill Creek near Bellegrove Washington County · Flood stage: 7.5 ft

Sligo Creek

Sligo Creek near Chillum / Riggs Rd. Prince Georges County · Flood stage: 10 ft Sligo Creek near Takoma Park Montgomery County · Flood stage: 5.5 ft

Soper Branch

Soper Branch at Hyattstown, MD Montgomery County

Southwest Branch

Southwest Branch near Largo / Harry S Truman Dr Prince Georges County · Flood stage: 11 ft

St. Clement Creek

St. Clement Creek near Clements St. Marys County · Flood stage: 7 ft

St. George Creek

St. George Creek at Straits Point (IN MLLW) St. Marys County · Flood stage: 3.5 ft

St. Marys River

St. Marys River at Great Mills St. Marys County · Flood stage: 7 ft

Susquehanna River

Susquehanna River at Conowingo Dam Cecil County · Flood stage: 23.5 ft

Swan Creek

Swan Creek at Swan Creek Harford County · Flood stage: 14 ft

Ten Mile Creek

Ten Mile Creek near Boyds Montgomery County · Flood stage: 7 ft Ten Mile Creek near Clarksburg Montgomery County · Flood stage: 7 ft

Town Creek (MD)

Town Creek (MD) near Oldtown Allegany County · Flood stage: 14 ft

Tributary to Dead Run Tributary

Tributary to Dead Run Tributary at Woodlawn Baltimore County · Flood stage: 7 ft

Turkey Branch

Turkey Branch near Aspen Hill Montgomery County · Flood stage: 10 ft

Unnamed Tributary

Unnamed Tributary near Middle River Baltimore County · Flood stage: 10.75 ft

West Branch Herring Run

West Branch Herring Run at Idlewylde Baltimore County · Flood stage: 9 ft

Western Branch

Western Branch at Upper Marlboro Prince Georges County · Flood stage: 11 ft Western Branch at Upper Marlboro / Marlboro Country Club Prince Georges County · Flood stage: 18 ft Western Branch near Woodmore / Lottsford Road Prince Georges County · Flood stage: 14 ft

Western Run

Western Run at Western Run Baltimore County · Flood stage: 8 ft

Whitemarsh Run

Whitemarsh Run at White Marsh Baltimore County · Flood stage: 11 ft Whitemarsh Run near Fullerton Baltimore County · Flood stage: 10 ft

Wills Creek

Wills Creek near Cumberland Allegany County · Flood stage: 10 ft

Winters Run

Winters Run near Bel Air Harford County · Flood stage: 9 ft Winters Run near Benson Harford County · Flood stage: 9 ft

Zekiah Swamp Run

Zekiah Swamp Run near Newtown Charles County · Flood stage: 11 ft

Frequently Asked Questions

How many river gauges are monitored in Maryland?

StormCast monitors 132 river gauges with NWS flood stage data in Maryland. These include USGS stream gauges and NWS forecast points on rivers and creeks across the state.

How do I get flood alerts for a Maryland river?

Download StormCast free on Google Play, go to River Gauges, and add any gauge to your watchlist. You'll receive a push notification when the water level crosses into a new NWS flood category.

How often are river levels updated?

USGS updates most gauge readings every 15 minutes. Each gauge page on this site shows live data fetched directly from USGS.

More Resources

River Level App Flood Alerts Understanding River Flood Levels Tornado Alerts Hurricane Tracker