A complex of showers and thunderstorms produced both wind damage and flash flooding in Berks County and southeastern Pennsylvania on the 13th. Doppler Radar storm total estimates averaged 2.5 to 7.0 inches, highest in Chester and Montgomery Counties. In addition to widespread poor drainage flooding, flooding also affected sections of the Brandywine and Wissahickon basins.  Major flooding occurred along sections of the Wissahickon and Valley Creeks. Vehicle water rescues were performed in Chester, Montgomery and lower Bucks Counties. The AAA of Mid-Atlantic reported a 60 percent increase in assistance calls. Because the torrential rain coincided with the morning commute, traffic on some interstates were backed up for hours. SEPTA commuter regional rail lines experienced on average thirty minute system-wide delays through the morning.  Arrival delays to Philadelphia International Airport reached 90 minutes.

Flood in CHESTER, PENNSYLVANIA
From 13-AUG-13 12:00:00 to 14-AUG-13 01:37:00 (EST-5)
Location: DOWNINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The runoff from the morning heavy rain on the 13th continued flooding along some of the creeks in eastern Chester County into the afternoon and night, especially in the Brandywine Basin. The East Branch of the Brandywine Creek below Downingtown had moderate flooding and was above its 7 foot flood stage from 725 a.m. EDT through 413 p.m. EDT on the 13th. It crested at 10.78 feet at 1045 a.m. EDT.  The main stem of the Brandywine Creek at Chadds Ford also had moderate flooding and was above its 9 foot flood stage from 2 p.m. EDT on the 13th through 237 a.m. EDT on the 14th. It crested at 11.72 feet at 815 p.m. EDT on the 13th.  The Valley Creek at Valley Forge had major flooding and was above its 7 foot flood stage from 705 a.m. EDT through 214 p.m. EDT on the 13th. It crested at 12.82 feet at 945 a.m. EDT.  Event precipitation totals included 6.53 inches in Coatesville, 4.24 inches in Chesterbrook, 4.15 inches in Downingtown, 3.73 inches in Tredyfrrin, 3.14 inches in Unionville and 2.65 inches in West Chester.

Flash Flood in BERKS, PENNSYLVANIA
From 13-AUG-13 07:00:00 to 13-AUG-13 09:00:00 (EST-5)
Location: WOMELSDORF STATION
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorms with heavy rain caused flash flooding of roadways and smaller streams in the southeastern part of Berks County.  Event precipitation totals included 2.82 inches in Reading, 2.66 inches in Wyomissing, 2.39 inches in Mohnton, 2.28 inches in Wernersville and 2.27 inches in Sinking Spring.

Flash Flood in CHESTER, PENNSYLVANIA
From 13-AUG-13 05:15:00 to 13-AUG-13 12:00:00 (EST-5)
Location: GLEN ROY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused poor drainage and smaller creek flash flooding in Chester County and then led to flooding along the east branch and the main stem of the Brandywine Creek that lasted into the night of the 13th. The heaviest precipitation for this event fell in Chester County.  About 30 vehicles became stuck in flood waters and five water rescues were performed. A mudslide occurred on the Pennsylvania Turnpike near mile marker 318 near Chester Springs. The Valley Creek at Valley Forge had major flooding and was above its 7 foot flood stage from 705 a.m. EDT through 214 p.m. EDT on the 13th. It crested at 12.82 feet at 945 a.m. EDT.  Event precipitation totals included 6.53 inches in Coatesville, 4.24 inches in Chesterbrook, 4.15 inches in Downingtown, 3.73 inches in Tredyfrrin, 3.14 inches in Unionville and 2.65 inches in West Chester.

Flash Flood in DELAWARE, PENNSYLVANIA
From 13-AUG-13 07:00:00 to 13-AUG-13 13:00:00 (EST-5)
Location: THORNTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused poor drainage and creek flash flooding, particularly in the northern half of Delaware County. The Blue Route (Interstate 476) was flooded. The runoff from the heavy rain also led to flooding along the main stem of the Brandywine Creek.  The Crum Creek at Newtown Square had moderate flooding and was above its 6 foot flood stage from 906 a.m. EDT through 158 p.m. EDT on the 13th. It crested at 9.40 feet at 1115 a.m. EDT.  Event precipitation totals included 3.10 inches in Wayne, 2.50 inches in Newtown Square and 1.72 inches in Aston.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 13-AUG-13 06:30:00 to 13-AUG-13 14:15:00 (EST-5)
Location: ROYERSFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused flash flooding, particularly in the lower half of Montgomery County. Emergency personnel responded to around 30 calls for assistance from motorists trapped in their flooded vehicles. In Norristown, four roadways (including Trooper Road and Van Buren Avenue) and underpasses were flooded and closed. A construction barge broke free on Stony Creek at two workers were rescued. in Hatboro, flooding along the Pennypack Creek reached into the parking lot of the Robert Bruce Apartments. Gulph Road was flooded in King of Prussia. The Wissahickon Creek at Fort Washington had major flooding and was above its 9 foot flood stage from 830 a..m. EDT through 313 p.m. EDT on the 13th. It crested at 12.35 feet at 1230 p.m. EDT. Event precipitation totals included 3.98 inches in West Norriton, 3.81 inches in Blue Bell, 3.56 inches in Fort Washington and 3.48 inches in North Wales.

Flash Flood in BUCKS, PENNSYLVANIA
From 13-AUG-13 08:30:00 to 13-AUG-13 12:53:00 (EST-5)
Location: CORNWELLS HGTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with heavy rain caused flash flooding in western Bucks County.  Vehicle rescues were performed in Southampton. The Little Neshaminy Creek at Neshaminy was above its 8 foot flood stage from 1029 a.m. EDT through 153 p.m. EDT on the 13th. It crested at 8.98 feet at Noon EDT. Event precipitation totals included 2.86 inches in Penndel, 2.17 inches in Warrington and 1.94 inches in Quakertown.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 13-AUG-13 07:20:00 to 13-AUG-13 14:45:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused poor drainage flash flooding as well as creek flooding within Philadelphia.  Flooding occurred along the Frankford, Pennypack and Wissahickon Creeks. A teenager was rescued from the Pennypack Creek in the Holmesburg section of the city. Extensive flooding snarled traffic along the Schuylkill Expressway. Lincoln Drive along the Wissahickon Creek was flooded in both directions and closed.  The Wissahickon Environmental Center Camp was cancelled because of flooding. The Frankford Creek at Castor Avenue had moderate flooding and was above its 7 foot flood stage twice from 820 a.m. EDT through 1011 a.m. EDT on the 13th. Its highest crest was 8.85 feet at 830 a.m. EDT. The Pennypack Creek at the Rhawn Street Bridge crested at 8.87 feet at 345 p.m. EDT.  The Wissahickon Creek at its mouth crested at 7.23 feet at 415 p.m. EDT.  Event precipitation totals included 2.20 inches at the Philadelphia International Airport and 1.93 inches in Northeast Philadelphia.

Flood in PHILADELPHIA, PENNSYLVANIA
From 13-AUG-13 14:45:00 to 13-AUG-13 19:01:00 (EST-5)
Location: FOX CHASE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The runoff from the morning heavy rain on the 13th continued flooding along some of the waterways in Philadelphia into the evening of the 13th. This was especially true of creeks whose sources are in Montgomery County as heavier rain fell in their headwater regions. The Pennypack Creek at the Rhawn Street Bridge was above its 7 foot flood stage from 848 a.m. EDT through 511 p.m. EDT on the 13th. It crested at 8.87 feet at 345 p.m. EDT. The Wissahickon Creek at its mouth within Philadelphia had moderate flooding and was above its 5 foot flood stage from 956 a.m. EDT through 801 p.m. EDT on the 13th. It crested at 7.23 feet at 415 p.m. EDT. Event precipitation totals included 2.20 inches at the Philadelphia International Airport and 1.93 inches in Northeast Philadelphia.

Flood in DELAWARE, PENNSYLVANIA
From 13-AUG-13 13:00:00 to 14-AUG-13 01:37:00 (EST-5)
Location: CHADDS FORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The runoff from the morning heavy rain on the 13th continued flooding along the Brandywine Creek into the night of the 13th. Heavier rain fell in Chester County.  The Brandywine Creek at Chadds Ford had moderate flooding and was above its 9 foot flood stage from 2 p.m. EDT on the 13th through 237 a.m. EDT on the 14th. It crested at 11.72 feet at 815 p.m. EDT on the 13th. Event precipitation totals included 3.10 inches in Wayne, 2.50 inches in Newtown Square and 1.72 inches in Aston.