An approaching cold front triggered thunderstorms with heavy downpours across Eastern Pennsylvania during the afternoon of the 13th. This was in addition to the heavy rain that fell across the Philadelphia northwest suburbs from the afternoon of the 12th into the early morning of the 13th preceding the same system's warm front. Total event precipitation amounts averaged between 2.0 and 3.5 inches. The initial shot of heavy rain left the ground nearly saturated and vulnerable to flash flooding which occurred in parts of Berks County, the Lehigh Valley and Montgomery County that afternoon and early evening. In addition, the combination of the preceding onshore flow, fresh water runoff and spring tides associated with the full moon caused minor tidal flooding during the overnight high tide cycle on the 13th along tidal sections of the Delaware River and its tributaries. The high tide in Philadelphia reached 8.46 feet above mean lower low water early on the 14th. Minor tidal flooding starts at 8.20 feet above mean lower low water.

Flash Flood in BERKS, PENNSYLVANIA
From 13-JUN-14 13:15:00 to 13-JUN-14 15:15:00 (EST-5)
Location: READING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with very heavy downpours caused flash flooding of roadways and small creeks in Reading.  Several motorists were stranded within the flood waters. Spring Street was flooded and closed. The subway was submerged. Other roadways that were flooded included the Warren Street Bypass (Pennsylvania State Route 12). Event precipitation totals included 2.07 inches within Reading and 2.05 inches at the Reading Regional Airport.

Flash Flood in BERKS, PENNSYLVANIA
From 13-JUN-14 13:20:00 to 13-JUN-14 15:20:00 (EST-5)
Location: BERNHARTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with very heavy downpours caused flash flooding of roadways and smaller creeks in Muhlenberg Township. Two vehicles were trapped in flood waters on North Fifth Street Highway near the Plaza 222 Shopping Center.

Flash Flood in BERKS, PENNSYLVANIA
From 13-JUN-14 12:55:00 to 13-JUN-14 15:00:00 (EST-5)
Location: WYOMISSING HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with very heavy downpours caused flash flooding of roadways and smaller creeks in and around Wyomissing. At least one vehicle was stranded in flood waters on State Hill Road near Bern Road in Wyomissing. Event precipitation total was 2.20 inches in Wyomissing.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 13-JUN-14 14:10:00 to 13-JUN-14 16:15:00 (EST-5)
Location: NEW HANOVER ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorms with very heavy downpours also caused flash flooding of roadways and small creeks in New Hanover Township. Flooding was reported along North Charlotte Street and Kleman Road near the Minister Creek. Event precipitation totals included 3.65 inches in Pottstown, 3.19 inches in Gilbertsville and 2.34 inches at the Pottstown Airport.

Flash Flood in LEHIGH, PENNSYLVANIA
From 13-JUN-14 14:00:00 to 13-JUN-14 16:00:00 (EST-5)
Location: EMMAUS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with very heavy downpours caused flash flooding of small creeks and poor drainage flooding in Lehigh County. In Allentown, heavy flooding was reported on Lehigh Street and around the intersection of U.S. Route 22 and MacArthur Road. In Emmaus, flood waters from the Leibert Creek inundated Indian Creek Road.  Event precipitation totals included 3.31 inches at the Lehigh Valley International Airport and 1.80 inches in Schnecksville.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 13-JUN-14 15:21:00 to 13-JUN-14 17:45:00 (EST-5)
Location: FRUITVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Thunderstorms with very heavy downpours caused flash flooding along the Perkiomen Creek at East Greenville. The creek crested at 4.33 feet at 645 p.m. EDT on the 13th. Event precipitation totals included 2.95 inches in East Greenville.

Flash Flood in NORTHAMPTON, PENNSYLVANIA
From 13-JUN-14 14:20:00 to 13-JUN-14 15:20:00 (EST-5)
Location: WEST EASTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with very heavy downpours caused poor drain flash flooding in eastern Northampton County. A water rescue was performed in Palmer Township on South 25th Street at the Easton High School.  Event precipitation totals included 3.62 inches in Forks Township, 3.34 inches in Martins Creek, 3.31 inches at the Lehigh Valley International Airport and 2.55 inches in Glendon.

Flood in MONTGOMERY, PENNSYLVANIA
From 13-JUN-14 17:45:00 to 13-JUN-14 18:56:00 (EST-5)
Location: FRUITVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Residual flooding from the heavy rain persisted into the evening of the 13th along the far northern Perkiomen Creek. The Perkiomen Creek at East Greenville was above its 4 foot flood stage from 421 p.m. EDT through 756 p.m. EDT on the 13th. It crested at 4.33 feet at 645 p.m. EDT. Event precipitation totals included 2.95 inches in East Greenville.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 13-JUN-14 13:50:00 to 13-JUN-14 15:20:00 (EST-5)
Location: POTTSTOWN MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorms with very heavy downpours caused flash flooding of roadways and small creeks in Upper Pottsgrove Township. Flooding was reported along Pine Ford Road at Pennsylvania State Route 100 near the headwaters of Sprogels Run and a tributary of the Manatawny Creek. Event precipitation totals included 3.65 inches in Pottstown, 3.19 inches in Gilbertsville and 2.34 inches at the Pottstown Airport.