With the Mid-Atlantic States sandwiched between a cold front approaching from the west and Hurricane Bill several hundred miles offshore, an extremely moist atmosphere in place. A mesoscale area of low pressure formed over central Virginia and worked east-northeastward toward lower southern Maryland during the late afternoon and evening of the 22nd, produce a wide area of rain and thunderstorms that produced heavy rain and flash flooding. Numerous rainfall reports of 3 to 5 inches were received, with one report of 6.35 inches in North Beach.

Flash Flood in CALVERT, MARYLAND
From 22-AUG-09 17:00:00 to 22-AUG-09 20:15:00 (EST-5)
Location: NORTH BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several roads between 3rd Street and 6th Street were closed in North Beach. Spotter reported 6.35 inches of rain in North Beach.

Flash Flood in CALVERT, MARYLAND
From 22-AUG-09 17:00:00 to 22-AUG-09 20:15:00 (EST-5)
Location: NORTH BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads closed in Chesapeake Beach due to flash flooding. Rainfall amount of 4.75 inches reported by COCORAHS observer.

Flash Flood in CALVERT, MARYLAND
From 22-AUG-09 17:00:00 to 22-AUG-09 20:15:00 (EST-5)
Location: OWINGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads south of Owings closed due to flash flooding. Spotter report of 4.32 inches of rain just to the west of the event.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 22-AUG-09 17:45:00 to 22-AUG-09 20:15:00 (EST-5)
Location: DAVIDSONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Road near the intersection of Route 214 and Beard's Point was closed due to flash flooding. Spotter reported 2.96 inches of rain near the event.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 22-AUG-09 17:45:00 to 22-AUG-09 20:15:00 (EST-5)
Location: PAROLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding reported on Hudson Street. Spotter reported 5.25 inches of rain just east of event.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 22-AUG-09 17:00:00 to 22-AUG-09 20:15:00 (EST-5)
Location: SUDLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The intersection of Muddy Creek Road and Holly Landing was closed due to flash flooding. Rainfall measurement of 4.25 inches near the event reported by COCORAHS network.

Flash Flood in CHARLES, MARYLAND
From 22-AUG-09 16:15:00 to 22-AUG-09 18:15:00 (EST-5)
Location: WHITE PLAINS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Turkey Hill Road was closed due to water flowing over the roadway. Spotter in the area reported rainfall total of 3.74 inches.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 22-AUG-09 17:18:00 to 22-AUG-09 19:00:00 (EST-5)
Location: CROWNSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The intersection of Crownsville Road and Honeysuckle Lane was closed due to flash flooding.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 22-AUG-09 17:45:00 to 22-AUG-09 20:15:00 (EST-5)
Location: LUSBY XRDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Road closed due to flash flooding near the intersection of Defense Highway and the Ridges. Rainfall report of 3.25 inches from COCORAHS observer just southeast of event area.