Heavy rain developed late in the afternoon of August 18th mainly across the Baltimore metropolitan area, and in southern Maryland. This heavy rain was ahead of an approaching cold front. The torrential rains caused numerous instances of flash flooding, with some of the flooding in southern Maryland being slow enough to recede that it lasted well into the overnight hours.

Flash Flood in ST. MARY'S, MARYLAND
From 18-AUG-17 21:50:00 to 18-AUG-17 22:30:00 (EST-5)
Location: OAKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Bishop Road flooded and closed at Burnt Mill Creek.

Flash Flood in ST. MARY'S, MARYLAND
From 18-AUG-17 22:01:00 to 18-AUG-17 22:30:00 (EST-5)
Location: LOVEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Friendship School Road flooded and closed at Burnt Mill Creek.

Flood in ST. MARY'S, MARYLAND
From 18-AUG-17 22:30:00 to 19-AUG-17 01:00:00 (EST-5)
Location: OAKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding persisted on Bishop Road at Burnt Mill Creek.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 17:56:00 to 18-AUG-17 18:43:00 (EST-5)
Location: BEL AIR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The USGS stream gage on Bynum Run near Bel Air exceeded the 9 foot flood stage for about 45 minutes during the afternoon of the 18th. Bynum Run Park was flooded.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 17:53:00 to 18-AUG-17 20:43:00 (EST-5)
Location: SINGER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The USGS stream gage on Otter Point Creek / Winters Run near Edgewood exceeded the 8 foot flood stage for over 2 hours, causing flooding on Winters Run Road near Singer Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:45:00 to 18-AUG-17 21:15:00 (EST-5)
Location: EMMORTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Bynum Run rapidly escaped its banks, causing flooding and a road closure at the intersection of Patterson Mill Road and East Wheel Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 16:45:00 to 18-AUG-17 18:45:00 (EST-5)
Location: GIBSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Torrential rain caused Thomas Run to flood, prompting the closure of Thomas Run Road at Ruffs Mills Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 16:47:00 to 18-AUG-17 19:00:00 (EST-5)
Location: BENSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Whitaker Mill Road flooded and closed near Old Joppa Road due to torrential rainfall.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 16:50:00 to 18-AUG-17 19:00:00 (EST-5)
Location: EMMORTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Plumtree Run flooded, causing South Tollgate Road to be closed near Ruth Avenue.

Flash Flood in HOWARD, MARYLAND
From 18-AUG-17 16:53:00 to 18-AUG-17 18:00:00 (EST-5)
Location: ELLICOTT CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A foot of water flowing over Main Street in Ellicott City at Belfont Drive due to heavy rainfall. The road had to be closed.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 16:54:00 to 18-AUG-17 19:00:00 (EST-5)
Location: FULFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Schucks Road flooded and closed near 308 Schucks Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 17:30:00 to 18-AUG-17 20:00:00 (EST-5)
Location: EMMORTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Bright Oaks Drive flooded and closed due to torrential rainfall.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 17:40:00 to 18-AUG-17 20:00:00 (EST-5)
Location: EMMORTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding caused a road closure at Laurel Bush Road and Spruce Pine Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 17:40:00 to 18-AUG-17 21:15:00 (EST-5)
Location: CARSINS RUN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Aldino Stepney Road was flooded by Carsins Run, causing it to be closed.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:15:00 to 18-AUG-17 18:45:00 (EST-5)
Location: EDGEWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A swift water rescue was reported near the Amtrak bridge on Edgewood Road.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:30:00 to 18-AUG-17 19:15:00 (EST-5)
Location: ABERDEEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A swift water rescue was reported near the intersection of US Route 40 and Maryland State Route 22.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:30:00 to 18-AUG-17 21:00:00 (EST-5)
Location: CARSINS RUN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Bush Chapel Road flooded and closed at a stream crossing near Aberdeen.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:30:00 to 18-AUG-17 21:00:00 (EST-5)
Location: ABERDEEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Old Robinhood Road flooded and closed due to rapid stream flooding.

Flash Flood in HARFORD, MARYLAND
From 18-AUG-17 18:30:00 to 18-AUG-17 19:00:00 (EST-5)
Location: ABINGDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A swift water rescue was reported on Bynum Run at Route 7.

Flash Flood in ST. MARY'S, MARYLAND
From 18-AUG-17 21:43:00 to 18-AUG-17 22:30:00 (EST-5)
Location: MORGANZA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Morganza Turner Road flooded and closed at a stream crossing near Morganza.