A slow moving cold front moved into the area during the evening of the 12th into the overnight and early morning hours of the 13th. Moisture pooling ahead of the cold front caused instability to increase in addition to added atmospheric moisture. Showers and thunderstorms developed, and some trained over the same areas resulting in instances of flooding and flash flooding. Central and northeastern Maryland were the areas hardest hit, where moisture and instability was highest.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:42:00 to 13-SEP-23 00:30:00 (EST-5)
Location: LOCHEARN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Vehicles were stranded in high water along Wabash Avenue in northwest Baltimore City. Water was flowing at least wheel deep on the roads.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:45:00 to 12-SEP-23 23:26:00 (EST-5)
Location: HALETHORPE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The water level rapidly rose above the flood stage of 13 feet along Gwynns Falls at Washington Boulevard. At 13 feet, Beach drive is flooded in several places and both the Riley Springs Trailbridge and Rapids Footbridge are completely covered by water.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:50:00 to 13-SEP-23 00:30:00 (EST-5)
Location: HALETHORPE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Vehicles were stranded in high water in Arbutus due to flowing water.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:50:00 to 13-SEP-23 00:30:00 (EST-5)
Location: ECCLESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Vehicles were stranded in flowing high water in Pikesville.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:51:00 to 13-SEP-23 00:30:00 (EST-5)
Location: STONELEIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Occupied vehicles were in floodwater due to heavy rainfall.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:51:00 to 13-SEP-23 00:30:00 (EST-5)
Location: STONELEIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

There were occupied vehicles stranded in floodwater at Loch Raven Boulevard.

Flash Flood in MONTGOMERY, MARYLAND
From 12-SEP-23 22:51:00 to 13-SEP-23 00:30:00 (EST-5)
Location: GLEN ECHO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Cabin John Parkway northbound after Clara Barton Parkway was closed due to water flowing across the road. Vehicles were stranded in high water.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 23:02:00 to 13-SEP-23 00:30:00 (EST-5)
Location: OAKLEIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

There were occupied vehicles in floodwater at the intersection of Oakleigh Road and Redwood Avenue.

Flash Flood in MONTGOMERY, MARYLAND
From 12-SEP-23 23:04:00 to 13-SEP-23 00:30:00 (EST-5)
Location: TAKOMA PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Maple Avenue was closed between Kennebec Avenue and Sligo Creek Parkway due to water flowing across the roadway.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 23:46:00 to 13-SEP-23 00:30:00 (EST-5)
Location: LOCHEARN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

An occupied vehicle was stuck in flood water at Buckingham Road and Liberty Road.

Flash Flood in BALTIMORE, MARYLAND
From 13-SEP-23 00:25:00 to 13-SEP-23 00:35:00 (EST-5)
Location: LINHIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The water level rapidly rose above flood stage of 11 feet along the Whitemarsh Run at White Marsh. At 11 feet, water covers the parking lots near the stream, particularly near the Town Center Court. The water fell below flood stage at 12:55 AM EST.

Flood in MONTGOMERY, MARYLAND
From 12-SEP-23 22:47:00 to 13-SEP-23 00:00:00 (EST-5)
Location: PARKWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The I-495 Inner Loop past exit 33 was partially closed due to high water.

Flood in MONTGOMERY, MARYLAND
From 12-SEP-23 23:02:00 to 13-SEP-23 00:30:00 (EST-5)
Location: FAIRLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

US 29 was closed at Fairland Road due to high water.

Flood in MONTGOMERY, MARYLAND
From 13-SEP-23 00:07:00 to 13-SEP-23 01:07:00 (EST-5)
Location: KEMP MILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The three left lanes of and the left shoulder of the I-495 Beltway Inner Loop were closed due to high standing water at exit 30A/US-29 Colesville Road.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 23:30:00 to 13-SEP-23 00:30:00 (EST-5)
Location: ESSEX
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Roads were closed due to flowing water around Essex.

Flash Flood in MONTGOMERY, MARYLAND
From 12-SEP-23 22:14:00 to 12-SEP-23 23:00:00 (EST-5)
Location: BARNESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Old Hundred Road had water flowing over it in a couple spots.

Flash Flood in BALTIMORE, MARYLAND
From 12-SEP-23 22:55:00 to 13-SEP-23 00:30:00 (EST-5)
Location: STONELEIGH
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flood waters entered businesses along Gladstone Avenue and Wyndhurst Avenue due to Stony Creek flowing out of its banks.

Flash Flood in BALTIMORE CITY (C), MARYLAND
From 12-SEP-23 22:00:00 to 13-SEP-23 00:30:00 (EST-5)
Location: LEAHIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported dozens of water rescues around the city of Baltimore along with Jones Falls flowing out of its banks.

Flash Flood in BALTIMORE CITY (C), MARYLAND
From 12-SEP-23 22:00:00 to 13-SEP-23 00:30:00 (EST-5)
Location: LEAHIGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported dozens of water rescues around the city of Baltimore along with Jones Falls flowing out of its banks.