A series of thunderstorms that moved across the same region (called training) around and just after Midnight EDT on the 27th caused flash flooding of streams and poor drainage flooding in Chester, Montgomery and Bucks Counties.The run-off from those thunderstorms and other thunderstorms later that morning caused flooding along some of the slower responding and/or larger streams. Doppler radar storm total estimates averaged between 1 and 4 inches across the three county area with the highest amounts in the central part of each county.

Flash Flood in BUCKS, PENNSYLVANIA
From 27-APR-07 02:00:00 to 27-APR-07 08:00:00 (EST-5)
Location: NEW BRITAIN
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with heavy rain continued to repeat over the same areas in a narrow band in central Bucks County. Doppler Radar storm total estimates reached 3 to 4 inches in those areas. This axis of heavy rain extended from New Britain Township east through Doylestown Township, Buckingham Township, Plumstead Township and Solebury Township.

The heavy rain from the thunderstorms caused about 18 roadways to be closed in Bucks County with many basements flooded and some motorists rescued. Even after the flood waters receded, debris had to be cleared from several roadways. Both New Britain and Solebury Townships declared states of emergency. In New Britain Township flooding occurred along the headwaters of the Neshaminy Creek. In Solebury Township, water reached up to six feet in some homes (basements). The Cuttalossa, Primrose and Paunacussing Creeks all flooded. A large chunk of Cuttalossa Road (30 feet by 30 feet) was washed away by the creek. The footbridge over the falls at the Cuttalossa Inn was washed away. River Road (Pennsylvania State Route 32) was undermined by the rushing waters of the Cuttalossa Creek.
The Neshaminy Creek at Langhorne had moderate flooding and was above its 9 foot flood stage from 1044 a.m. EDT through 859 p.m. EDT on the 27th. It crested at 11.96 feet at 615 p.m. EDT.
Storm totals included 4.90 inches in Fricks, 4.17 inches in Doylestown, 3.02 inches in Perkasie, 2.30 inches in Furlong and 1.96 inches in Sellersville.

Flood in BUCKS, PENNSYLVANIA
From 27-APR-07 08:00:00 to 27-APR-07 19:54:00 (EST-5)
Location: LANGHORNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The run-off from the heavy rain that fell during the morning of the 27th caused flooding to occur into the evening of the 27th along the main stem of the Neshaminy Creek.

The Neshaminy Creek at Langhorne had moderate flooding and was above its 9 foot flood stage from 1044 a.m. EDT through 859 p.m. EDT on the 27th. It crested at 11.96 feet at 615 p.m. EDT.
Storm totals included 4.90 inches in Fricks, 4.17 inches in Doylestown, 3.02 inches in Perkasie, 2.30 inches in Furlong and 1.96 inches in Sellersville.

Flood in DELAWARE, PENNSYLVANIA
From 27-APR-07 10:51:00 to 27-APR-07 16:24:00 (EST-5)
Location: ALDAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Run-off from the heavier rain earlier in the day in Chester County caused flooding along the main stem of the Brandywine Creek during the afternoon of the 27th. The main stem of the Brandywine Creek at Chadds Ford was above its 9 foot flood stage from 1155 a.m. EDT through 524 p.m. EDT on the 27th. It crested at 9.66 feet at 3 p.m. EDT.

Flash Flood in CHESTER, PENNSYLVANIA
From 27-APR-07 01:06:00 to 27-APR-07 08:00:00 (EST-5)
Location: COATESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with heavy rain continued to occur in a narrow band across north central Chester County from Sadsbury Township eastward through West Brandywine Township, East Nantmeal Township and East Vincent and Coventry Townships. Doppler Radar storm total estimates reached 3 to 4 inches within this band. Run-off from this band also affected the Brandywine Basin downstream. Flooding forced the closure of Clover Mill Road in East Pikeland Township. Repairs to Brandywine Creek Road in Coatesville were washed away. In Downingtown, the municipal lots were flooded.
The East Branch of the Brandywine Creek at Downingtown experienced moderate flooding. It was above its 7 foot flood stage from 415 a.m. EDT through 1105 a.m. EDT on the 27th. It crested at 10.51 feet at 745 a.m. EDT. The French Creek at Phoenixville was above its 8 foot flood stage from 206 a.m. EDT through 649 a.m. EDT on the 27th. It crested at 9.67 feet at 4 a.m. EDT.
Storm totals included 3.92 inches in Honey Brook, 3.30 inches in Glenmoore and 2.63 inches in East Nantmeal Township.

Flash Flood in MONTGOMERY, PENNSYLVANIA
From 27-APR-07 01:40:00 to 27-APR-07 08:00:00 (EST-5)
Location: SCHWENKSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with heavy rain continued to repeat over the same areas in central Montgomery County. Doppler Radar storm total estimates reached 3 to 4 inches in those areas. The narrow band extended from Upper Providence Township east through Collegeville, Skippack Township, Lower Salford Township, Towamencin Township, Franconia Township and Hatfield Township.
In Towamencin Township, six motorists were rescued from flood waters. The bridge on Rittenhouse Road was damaged. In Hatfield, several businesses and homes were swamped by flood waters. In Collegeville, homes along 6th and 11th Avenues were flooded. Pennsylvania State Route 29 near the Perkiomen Creek in Collegeville and Skippack were temporarily closed. Basements were flooded in Lansdale. The Perkiomen Valley School District had two hour delayed openings because of flooded roadways.
The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 544 a.m. EDT through 1152 a.m. EDT on the 27th. It crested at 8.31 feet at 930 a.m. EDT.
Storm totals included 3.70 inches in Graterford, 3.00 inches in Lansdale and 2.01 inches in Pottstown.

Flood in MONTGOMERY, PENNSYLVANIA
From 27-APR-07 08:00:00 to 27-APR-07 10:52:00 (EST-5)
Location: SCHWENKSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Run-off from the heavy rain the fell early on the 27th continued to cause flooding in parts of the Perkiomen River Valley into the afternoon of the 27th.
The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 544 a.m. EDT through 1152 a.m. EDT on the 27th. It crested at 8.31 feet at 930 a.m. EDT.
Storm totals included 3.70 inches in Graterford, 3.00 inches in Lansdale and 2.01 inches in Pottstown.

Flood in CHESTER, PENNSYLVANIA
From 27-APR-07 08:00:00 to 27-APR-07 16:24:00 (EST-5)
Location: DOWNINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Run-off from the heavier rain earlier in the day on the 27th caused flooding along the east branch and main stem of the Brandywine Creek. The East Branch of the Brandywine Creek at Downingtown experienced moderate flooding. It was above its 7 foot flood stage from 415 a.m. EDT through 1105 a.m. EDT on the 27th. It crested at 10.51 feet at 745 a.m. EDT. The main stem of the Brandywine Creek at Chadds Ford (Delaware County) was above its 9 foot flood stage from 1155 a.m. EDT through 524 p.m. EDT on the 27th. It crested at 9.66 feet at 3 p.m. EDT.
Storm totals included 3.92 inches in Honey Brook, 3.30 inches in Glenmoore and 2.63 inches in East Nantmeal Township.