A nearly stationary boundary set up near the Potomac River weak low pressure developed along the boundary. There was plenty of moisture in place from the Atlantic and Gulf of Mexico, and this combined with instability to produce very heavy rainfall rates in convection that developed. Convection was maximized around the boundary across central Maryland, and this led to several instances of flooding and flash flooding.

Flood in FREDERICK, MARYLAND
From 08-JUL-19 05:55:00 to 08-JUL-19 08:55:00 (EST-5)
Location: BRADDOCK HGTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hollow Road was flooded and closed between Valley View Road and Route 40.

Flood in FREDERICK, MARYLAND
From 08-JUL-19 06:14:00 to 08-JUL-19 08:14:00 (EST-5)
Location: CREAGERSTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Wilhide road was closed between Blacks Mill Road and Stevens Road.

Flood in FREDERICK, MARYLAND
From 08-JUL-19 06:18:00 to 08-JUL-19 08:18:00 (EST-5)
Location: ST ANTHONY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hornets Nest Road was flooded and closed near Friends Creek.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 06:48:00 to 08-JUL-19 11:00:00 (EST-5)
Location: BARNESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A vehicle was stuck in high water at the intersection of West Old Baltimore Road and Barnesville Road.

Flash Flood in FREDERICK, MARYLAND
From 08-JUL-19 06:13:00 to 08-JUL-19 08:45:00 (EST-5)
Location: YELLOW SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous roads were flooded and impassable in the city of Frederick.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 06:51:00 to 08-JUL-19 11:00:00 (EST-5)
Location: BOYDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A vehicle was stuck in high water at the intersection of Cornflower Road and Kings Crossing Boulevard.

Flood in FREDERICK, MARYLAND
From 08-JUL-19 07:00:00 to 08-JUL-19 09:00:00 (EST-5)
Location: FREDERICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were flooded throughout the city of Frederick, including along portions of North Market and West Patrick Streets.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 08:25:00 to 08-JUL-19 10:25:00 (EST-5)
Location: ROCKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD 28 was closed at MD 355 due to high water.

Flood in FREDERICK, MARYLAND
From 08-JUL-19 08:55:00 to 08-JUL-19 10:55:00 (EST-5)
Location: PLEASANT VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water was over Pleasant View Road near Tuscarora Creek and the road was impassable.

Flood in CARROLL, MARYLAND
From 08-JUL-19 10:21:00 to 08-JUL-19 12:21:00 (EST-5)
Location: SYKESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

River Road was closed due to flooding along the South Branch Patapsco River.

Flood in PRINCE GEORGE'S, MARYLAND
From 08-JUL-19 10:45:00 to 08-JUL-19 12:45:00 (EST-5)
Location: FT WASHINGTON FOREST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Gallahan Road was closed near the 12900 Block due to flooding.

Flash Flood in HOWARD, MARYLAND
From 08-JUL-19 09:15:00 to 08-JUL-19 10:30:00 (EST-5)
Location: CLARKSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trotter road was impassable due to water flowing over the road.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 09:39:00 to 08-JUL-19 12:00:00 (EST-5)
Location: BRIGHTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two to three feet of water was flowing over portions of Brighton Dam Road in the 1900 and 2200 Blocks.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 10:15:00 to 08-JUL-19 12:00:00 (EST-5)
Location: CARDEROCK SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Road was partially washed out on Bradley Boulevard near the Norwood School.

Flash Flood in CHARLES, MARYLAND
From 08-JUL-19 10:18:00 to 08-JUL-19 12:00:00 (EST-5)
Location: ST CHARLES
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wakefield circle was flooded with water up over the bottom of vehicle doors.

Flash Flood in ST. MARY'S, MARYLAND
From 08-JUL-19 11:43:00 to 08-JUL-19 13:00:00 (EST-5)
Location: HUNTERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

All Faith Church Road was closed near Wanda Lane.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 06:52:00 to 08-JUL-19 11:00:00 (EST-5)
Location: BARNESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Water was stuck in high water near the intersection of Peach tree Road and Barnesville Road.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 07:09:00 to 08-JUL-19 11:00:00 (EST-5)
Location: DARNESTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A vehicle was stuck in the water at the intersection of Turkey Foot Road and Falling Leaf Drive.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 07:09:00 to 08-JUL-19 11:00:00 (EST-5)
Location: QUINCE ORCHARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A vehicle was stuck in high water at the intersection of Wonder View Way and Quince Orchard Road.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 08:09:00 to 08-JUL-19 11:00:00 (EST-5)
Location: BETHESDA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Goldsboro Road was closed due to high water. Multiple vehicles were stranded in high water around the area.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 08:25:00 to 08-JUL-19 11:00:00 (EST-5)
Location: CLARKSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Newcut Road was washed out near the intersection with Frederick Road.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 12:38:00 to 08-JUL-19 14:38:00 (EST-5)
Location: BUCK LODGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Barnesville Road was closed due to a stream flowing across the roadway.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 13:42:00 to 08-JUL-19 15:42:00 (EST-5)
Location: KENWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wissioming Road was closed due to a partial washout.

Flood in ST. MARY'S, MARYLAND
From 08-JUL-19 16:00:00 to 08-JUL-19 20:33:00 (EST-5)
Location: GREAT MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The water level at Great Mills on the St Marys River rose above the flood stage of 6 feet and it crested at 7.5 feet at 6 PM EST. Flat Iron Road was flooded along with yards in Great Mills.

Flood in PRINCE GEORGE'S, MARYLAND
From 08-JUL-19 10:03:00 to 09-JUL-19 06:15:00 (EST-5)
Location: UPPER MARLBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The water level at the gauge along the West Branch of the Patuxent River in Upper Marlboro rose above flood state of 11 feet at 10:03 AM EST and fell below at 10:31 AM EST. The water level rose above flood stage of 11 feet again at 6:45 PM EST and it crested at 12.21 feet at 11:30 PM EST before falling below flood stage at 6:15 AM EST on the 9th. At 12 feet, much of Race Track Road floods between Marlboro Pike and the community center. The water street bridge in Upper Marlboro was also completely covered by water.

Flood in ST. MARY'S, MARYLAND
From 08-JUL-19 11:05:00 to 08-JUL-19 13:05:00 (EST-5)
Location: LNRDTWN ST MARYS ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Indian Bridge Road was closed near Route 4.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 12:18:00 to 08-JUL-19 14:18:00 (EST-5)
Location: FAIRLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

There was a partial washout of Falling Creek Road between Hidden Valley Lane and Old Columbia Pike.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 12:23:00 to 08-JUL-19 14:23:00 (EST-5)
Location: TAKOMA PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Park Valley Road was closed due to flooding at the crossing over Sligo Creek.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 12:29:00 to 08-JUL-19 14:29:00 (EST-5)
Location: GERMANTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Riffle Ford Road was closed between MD 28 and MD 118.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 12:34:00 to 08-JUL-19 14:34:00 (EST-5)
Location: CLAGGETTSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Gue Road was closed due to flooding.

Flood in CHARLES, MARYLAND
From 08-JUL-19 20:45:00 to 09-JUL-19 04:00:00 (EST-5)
Location: INDIAN HD MRYLND ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The water level rose to the flood stage of 7 feet along the Mattowoman Creek at Pomonkey. The water level crested at 7.43 feet at 10:00 PM EST on the 8th. At 7 feet, Pomfret Road begins to flood.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 08:29:00 to 08-JUL-19 11:00:00 (EST-5)
Location: EMERY CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple vehicles were stranded in high water on Clara Barton Barkway under Interstate 495.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 09:03:00 to 08-JUL-19 12:00:00 (EST-5)
Location: PARKWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A water rescue occurred along Beach Drive and Franklin Street.

Flash Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 09:10:00 to 08-JUL-19 12:00:00 (EST-5)
Location: CARDEROCK
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A large sink hole developed on Belfast Road due to flash flooding.

Flood in MONTGOMERY, MARYLAND
From 08-JUL-19 07:40:00 to 08-JUL-19 20:56:00 (EST-5)
Location: DAWSONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Creek level rose above flood state of 7.5 feet at 7:40 AM EST and it crested at 11.73 feet at 9:30 AM EST. Water from the creek entered the gage house. Multiple roads were flooded and water also reached the first floor of Old Black Rock Mill.

Flood in HOWARD, MARYLAND
From 08-JUL-19 10:21:00 to 08-JUL-19 13:21:00 (EST-5)
Location: WOODSTOCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

River road was closed due to flooding along the South Branch Patapsco River due to flooding.