A slow-moving warm front lifted northward through northern Virginia during the afternoon and evening. Over 24 hours of intermittent rain had created saturated grounds across the area and even a report of morning flooding.  Thus, when thunderstorms fired later in the day as instability and wind fields strengthened, high rainfall rates associated with them lead to flash flooding in several locations in the western suburbs of Washington DC, and flooding continued for a while after rains ended.  The highest rainfall amount received was 4.11 inches in Fairfax County.

Flash Flood in FAIRFAX, VIRGINIA
From 13-OCT-11 20:00:00 to 13-OCT-11 21:30:00 (EST-5)
Location: CHANTILLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Walney Road was closed just south of Mariah Court due to flash flooding on Flat Lick Stream.  An observer near the event recorded 2.26 inches of rain.

Flash Flood in LOUDOUN, VIRGINIA
From 13-OCT-11 19:55:00 to 13-OCT-11 21:30:00 (EST-5)
Location: LEESBURG MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Shreve Mill Road was closed between Sycolin Road and the Dulles Greenway due to flash flooding.

Flash Flood in FAIRFAX, VIRGINIA
From 13-OCT-11 20:30:00 to 13-OCT-11 21:30:00 (EST-5)
Location: CLARKS CROSSING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Stewart Mill Road was closed near Birdfoot Lane due to flash flooding on Little Difficult Run.  A nearby spotter observed 1.60 inches of rain.

Flood in FAIRFAX, VIRGINIA
From 13-OCT-11 21:30:00 to 13-OCT-11 23:45:00 (EST-5)
Location: RESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A one-lane bridge on Springvale Road near Crippen Court was closed due to 2 feet of standing water on the roadway.  A nearby observer tallied 1.10 inches of rain.

Flood in CULPEPER, VIRGINIA
From 13-OCT-11 09:00:00 to 13-OCT-11 14:00:00 (EST-5)
Location: MONUMENT MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Butler Store Road was closed near its intersection with Monumental Mills Road due to earlier rainfall.  A nearby spotter measured 3.26 inches of rain.

Flash Flood in FAIRFAX, VIRGINIA
From 13-OCT-11 17:30:00 to 13-OCT-11 21:30:00 (EST-5)
Location: CROWELLS CORNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The intersection of Browns Mill Road and Beulah Road was closed due to flash flooding.  A nearby spotter measured 2.99 inches of rain.

Flood in FAIRFAX, VIRGINIA
From 13-OCT-11 17:30:00 to 13-OCT-11 21:30:00 (EST-5)
Location: CLARKS CROSSING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hunter Mill Road closed south of the intersection of Hunter Mill Road and Cedar Pond Road.  Water was flowing across the roadway with depth of at least 6 inches.  A nearby rain gauge tallied 1.53 inches.

Flash Flood in LOUDOUN, VIRGINIA
From 13-OCT-11 19:55:00 to 13-OCT-11 21:30:00 (EST-5)
Location: BROAD RUN FARMS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thomas Avenue was closed near Lake Drive due to flash flooding.