Flash Flooding and Flooding in Pennsylvania, September 5 to 10, 2011

Thunderstorms with heavy rain caused poor drainage flooding and flash flooding of smaller streams in extreme northern Montgomery County in Upper Hanover Township. The Perkiomen Creek at East Greenville was above its 4 foot flood stage from 916 p.m. EDT on the 5th through 344 a.m. EDT on the 6th. It crested at 5.57 feet at 1 a.m. EDT on the 6th. Event precipitation totals through the morning of the 6th included 3.00 inches in Palm.

Thunderstorms with heavy rain caused poor drainage flooding and flash flooding of smaller streams in lower Lehigh County mainly in Lower Milford and Upper Saucon Townships. Doppler Radar storm total estimates reached 2 to 3 inches in this area.

Thunderstorms with heavy rain caused poor drainage flooding and flash flooding of smaller streams in lower Northampton County mainly in Williams and Lower Saucon Townships. Doppler Radar storm total estimates reached 2 to 3 inches in this area and event precipitation totals through the morning of the 6th included 2.87 inches in Glendon and 2.60 inches in Martins Creek.

The first round of heavier rain that started on the 6th produced widespread poor drainage, creek and river flooding in Philadelphia that persisted through the afternoon of the 7th. A mudslide forced the closure of the Schuylkill Expressway on the 7th between the Blue Route (Interstate 476) in Montgomery County and Girard Avenue in Philadelphia.The Schuylkill River in Philadelphia was above its 11 foot flood stage from 425 a.m. EDT through 6 p.m. EDT on the 7th. It crested at 12.03 feet at 1230 p.m. EDT. The Wissahickon Creek at its mouth was above its 5 foot flood stage from 715 p.m. EDT on the 6th through 342 p.m. EDT on the 7th. It crested at 6.22 feet at Noon EDT on the 7th. The Pennypack Creek at the Rhawn Street Bridge had moderate flooding and was above its 7 foot flood stage from 307 p.m. EDT on the 6th through 2 a.m. EDT on the 7th. It crested at 9.46 feet at 1030 p.m. EDT on the 6th. The Pennypack Creek at the Rhawn Street Bridge was above its 7 foot flood stage again from 630 a.m. EDT through 1115 a.m. EDT on the 7th. It crested at 8.34 feet at 930 a.m. EDT. The Frankford Creek at Castor Avenue was above its 7 foot flood stage from 711 p.m. EDT through 726 p.m. EDT on the 6th. It crested at 7.21 feet at 715 p.m. EDT.

Smaller rivers and streams flooded twice during successive periods of heavier rain in the county, once from the evening of the 6th into the early afternoon of the 7th and again from the late afternoon of the 7th into the afternoon of the 8th. The heavy rain saturated the soil and knocked over a couple of weak trees in Pottstown and Collegeville. Meanwhile flooding along the Schuylkill River started during the evening of the 6th and continued through the morning of the 10th. A mudslide forced the closure of the Schuylkill Expressway on the 7th between the Blue Route (Interstate 476) and Girard Avenue within Philadelphia. On the morning of the 7th, the Fort Washington Interchange of the Pennsylvania Turnpike was closed in both directions. There were road closures due to flooding in Pottstown, Lower Providence, Schwenksville and Collegeville. The Perkiomen Valley School District in Collegeville had two hour delayed openings as three bridges were closed.

The Schuylkill River at Pottstown had moderate flooding, its 6th highest crest on record and highest crest since June 29, 2006. The river was above its 12.5 foot flood stage from 505 p.m. EDT on the 7th through 141 a.m. EDT on the 10th. It crested at 18.27 feet at 630 a.m. EDT on the 9th. Farther downstream the Schuylkill River at Norristown had moderate flooding and was above its 13 foot flood stage from 1056 p.m. EDT on the 6th through 530 a.m. EDT on the 10th. It crested at 16.06 feet at 1015 a.m. EDT on the 7th.

During the first round of widespread flooding, the West Branch Perkiomen Creek at Hillegass was above its 5 foot flood stage from 318 a.m. EDT through 407 a.m. EDT on the 7th. It crested at 5.04 feet at 330 a.m. EDT. The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 919 p.m. EDT on the 6th through 220 p.m. EDT on the 7th. It crested at 9.19 feet at 5 a.m. EDT on the 7th. The main stem of the Perkiomen Creek at East Greenville was above its 4 foot flood stage from 603 p.m. EDT on the 6th through 1111 a.m. EDT on the 7th. It crested at 5.73 feet at 745 a.m. EDT on the 7th. Farther downstream, the Perkiomen Creek at Graterford had moderate flooding and was above its 11 foot flood stage from 1118 p.m. EDT on the 6th through 217 p.m. EDT on the 7th. It crested at 13.93 feet at 545 a.m. EDT on the 7th. The Wissahickon Creek at Fort Washington was above its 9 foot flood stage from 745 p.m. EDT on the 6th through 1205 a.m. EDT on the 7th. It crested at 9.97 feet at 915 p.m. EDT on the 6th. The Wissahickon Creek at Fort Washington then had moderate flooding and was above its 9 foot flood stage again from 509 a.m. EDT through 1056 a.m. EDT on the 7th. It crested at 10.86 feet at 815 a.m. EDT.

During the second round of widespread flooding, the East Branch of the Perkiomen Creek at Schwenksville had major flooding and its 7th highest crest on record. It was above its 7 foot flood stage from 544 a.m. EDT through 214 p.m. EDT on the 8th. It crested at 10.82 feet at 1215 p.m. EDT on the 8th. The Main Stem of the Perkiomen Creek at East Greenville was above its 4 foot flood stage from 620 p.m. EDT through 1113 p.m. EDT on the 7th. It crested at 4.48 feet at 915 p.m. EDT. The Wissahickon Creek at Fort Washington had major flooding and its 2nd highest crest on record, 2nd only to the crest recorded during Hurricane Floyd on September 16, 1999. It was above its 9 foot flood stage from 250 a.m. EDT through 1242 p.m. EDT on the 8th. It crested at 16.68 feet at 645 a.m. EDT.

Entire event rainfall totals included 7.99 inches in Conshohocken, 6.74 inches in Blue Bell, 5.80 inches in Norristown, 5.42 inches in Pottstown, 5.40 inches in Green Lane, 4.75 inches in Collegeville and 4.66 inches in Rockledge.

During the first round of widespread flooding in Chester County, the French Creek at Phoenixville was above its 8 foot flood stage from 245 a.m. EDT through 632 a.m. EDT on the 7th. It crested at 8.97 feet at 4 a.m. EDT. The East Branch of the Brandywine Creek at Downingtown had moderate flooding and was above its 7 foot flood stage from 839 p.m. EDT on the 6th through 1006 a.m. EDT on the 7th. It crested at 9.53 feet at 615 a.m. EDT on the 7th. The main stem of the Brandywine Creek at Chadds Ford was above its 9 foot flood stage from 225 a.m. EDT through 448 p.m. EDT on the 7th. It crested at 10.14 feet at 1230 p.m. EDT. The Valley Creek at Valley Forge was above its 7 foot flood stage from 809 p.m. EDT through 1113 p.m. EDT on the 6th. It crested at 7.57 feet at 845 p.m. EDT. The Valley Creek at Valley Forge was again above its 7 foot flood stage from 328 a.m. EDT through 746 a.m. EDT on the 7th. It crested at 7.48 feet at 645 a.m. EDT.

The first round of widespread heavier rain that started on the 6th caused creek flooding concentrated in the southwest half of Delaware County. The Brandywine Creek at Chadds Ford was above its 9 foot flood stage from 225 a.m. EDT through 448 p.m. EDT on the 7th. It crested at 10.14 feet at 1230 p.m. EDT. The Chester Creek at Chester was above its 8 foot flood stage from 828 p.m. EDT through 1115 p.m. EDT on the 6th. It crested at 8.39 feet at 1015 p.m. EDT. The Chester Creek at Chester was above its 8 foot flood stage again from 328 a.m. EDT through 721 a.m. EDT on the 7th. It crested at 9.43 feet at 530 a.m. EDT. The Crum Creek at Newtown Square was above its 6 foot flood stage from 325 a.m. EDT through 649 a.m. EDT on the 7th. It crested at 7.07 feet at 430 a.m. EDT.

The first round of heavier rain that started on the 6th and persisted overnight caused poor drainage and mostly smaller creek flooding in Bucks County.

The East Branch of the Perkiomen Creek at Dublin was above its 5 foot flood stage from 831 p.m. EDT through 1015 p.m. EDT on the 6th. It crested at 5.51 feet at 930 p.m. EDT. The East Branch of the Perkiomen Creek at Dublin was again above its 5 foot flood stage from 410 a.m. EDT through 615 a.m. EDT on the 7th. It crested at 5.68 feet at 515 a.m. EDT. The Neshaminy Creek at Langhorne had moderate flooding and was above its 9 foot flood stage from 835 p.m. EDT on the 6th through 443 a.m. EDT on the 7th. It crested at 10.27 feet at 11 p.m. EDT on the 6th. The Neshaminy Creek at Langhorne again had moderate flooding and was above its 9 foot flood stage from 849 a.m. EDT through 735 p.m. EDT on the 7th. It crested at 10.7 feet at 246 p.m. EDT.

Heavy rain caused flooding along the Manatawny Creek. The Manatawny Creek at Spangsville was above its 6 foot flood stage from 1015 p.m. EDT on the 6th through 137 a.m. EDT on the 7th. It crested at 6.07 feet at 1145 p.m. EDT on the 6th.

The runoff from the heavier rain that fell overnight caused poor drainage flooding across eastern Monroe County on the morning of the 7th. Pennsylvania State Route 447 and Cherry Valley Road were closed in Stroud Township and Stonehouse Road was closed in Smithfield Township. The Delaware Water Gap National Recreation Area was also closed.

Runoff from two additional rounds of heavier rain caused poor drainage flooding as well as flooding along most of the gaged streams and rivers in Northampton County including the Delaware and Lehigh Rivers. In Easton, the Delaware River flooded Larry Holmes Boulevard and Pennsylvania State Route 611. In Upper Mount Bethel Township, flooding along the Delaware River reached homes. Some schools were closed in the eastern part of the county on the 8th and 9th.

The Monocacy Creek at Bethlehem was above its 4.5 foot flood stage from 240 a.m. EDT on the 7th through 532 a.m. EDT on the 8th. It crested at 5.65 feet at 115 p.m. EDT on the 7th. The Monocacy Creek at Bethlehem was again above its 4.5 foot flood stage from 1252 p.m. EDT through 615 p.m. EDT on the 8th. It crested at 4.78 feet at 215 p.m. EDT. The Lehigh River at Walnutport was briefly above its 8 foot flood stage from 945 a.m. EDT through 1038 a.m. EDT on the 7th. It crested at 8.01 feet at 10 a.m. EDT. The Lehigh River at Walnutport was then again above its 8 foot flood stage from 317 p.m. EDT on the 8th through 102 a.m. EDT on the 9th. It crested at 8.8 feet at 9 p.m. EDT on the 8th. Farther downstream, the Lehigh River at Glendon had major flooding, its 6th highest crest on record and its highest crest since June of 2006. The river was above its 19 foot flood stage from 900 a.m. EDT on the 8th through 130 p.m. EDT on the 9th. It crested at 21.45 feet at 245 a.m. EDT on the 9th.|The Delaware River at Easton had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 22 foot flood stage from 654 p.m. EDT on the 7th through 355 a.m. EDT on the 10th. It crested at 29.23 feet at 3 a.m. EDT on the 9th. Farther upstream, the Delaware River at Belvidere (Warren County) crested below its flood stage of 22 feet.

Entire event rainfall totals included 8.82 inches in Williams Township, 8.67 inches in Bethlehem, 8.08 inches in Glendon, 7.95 inches in Easton and 7.14 inches in Walnutport.

Heavy rain again caused flooding along the Manatawny Creek. Flooding also forced the closure of U.S. Route 422 in Amity Township. The Manatawny Creek at Spangsville was again above its 6 foot flood stage from 530 a.m. EDT through 1005 a.m. EDT on the 7th. It crested at 6.26 feet at 815 a.m. EDT.

Runoff from the heavy rain that fell overnight on the 6th caused poor drainage and some waterway flooding in Lehigh County. The Lehigh River at Walnutport (Northampton County) was briefly above its 8 foot flood stage from 945 a.m. EDT through 1038 a.m. EDT on the 7th. It crested at 8.01 feet at 10 a.m. EDT. The Little Lehigh at Little Lehigh Park in Allentown was above its 6 foot flood stage from 549 a.m. EDT through 858 a.m. EDT on the 7th. It crested at 6.35 feet at 745 a.m. EDT.

Runoff from the heavy rain that fell overnight on the 6th caused flooding along the Aquashicola Creek in Lower Towamensing Township. Total event precipitation totals included 7.04 inches in Weatherly, 6.57 inches in Hauto, 5.07 inches in Lehighton and 4.36 inches in Towamensing Township.

Repeating showers and thunderstorms with heavy rain caused flash flooding of smaller streams and poor drainage areas in western Berks County during the afternoon and evening of the 7th. Twenty-four hour rainfall totals ending at 8 a.m. EDT on the 8th reached around 6 inches. Hardest hit were Bethel, Tulpehocken and Marion Townships. In Marion Township, water rescues were performed. Off of Canal Road within the township, a herd of cattle became stranded in a field. U.S. Route 422 was closed in Wolmelsdorf Borough.

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams and poor drainage areas in the western part of Chester County during the afternoon and early evening of the 7th. This initiated the flooding in the Brandywine Creek Basin.

Another band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams and poor drainage areas in the eastern half of Berks County during the late afternoon and evening of the 7th. Water rescues were performed in Cumru, Exeter (U.S. Route 422) and Oley Townships. Road closures occurred in Exeter, Ontelaunee, Cumru, Richmond and Greenwich Townships. In Reading, flash flooding was reported along Pennsylvania State Route 12. In Birdsboro, West Main Street was closed after the Hay Creek started to flood. Flooding along the Manatawny Creek was reported in Oley Township. The sewage system in Kutztown was getting overwhelmed.

Just after the flooding from the first round of heavier rain ended, the flooding and flash flooding associated with the second round of heavier rain began in Chester County. Flooding along the East Branch of the White Clay Creek in Avondale Borough forced the evacuation of 40 residents. Flooding along the East Branch of the Brandywine Creek and U.S. Route 30 divided Downingtown Borough in half. In North Coventry Township, River Road along the Schuylkill River was flooded and closed. One vehicle became stuck in the flood waters.

The Schuylkill River at Pottstown (Montgomery County) had moderate flooding, its 6th highest crest on record and highest crest since June 29, 2006. The river was above its 12.5 foot flood stage from 505 p.m. EDT on the 7th through 141 a.m. EDT on the 10th. It crested at 18.27 feet at 630 a.m. EDT on the 9th. The West Branch Brandywine Creek at Honey Brook had moderate flooding and its 7th highest crest on record. It was above its 7 foot flood stage from 528 p.m. EDT through 1156 p.m. EDT on the 7th. It crested at 10.36 feet at 700 p.m. EDT.|Farther downstream, the West Branch Brandywine at Coatesville was above its 7 foot flood stage from 1102 p.m. EDT on the 7th through 142 a.m. EDT on the 8th. It crested at 7.34 feet at 1200 a.m. EDT on the 8th. The East Branch Brandywine at Downingtown had major flooding and was above its 7 foot flood stage from 537 p.m. EDT on the 7th through 225 a.m. EDT on the 8th. It crested at 11.70 feet at 930 p.m. EDT on the 7th. The main stem of the Brandywine Creek at Chadds Ford had moderate flooding and was above its 9 foot flood stage from 1110 p.m. EDT on the 7th through 326 p.m. EDT on the 8th. It crested at 11.70 feet at 615 a.m. EDT on the 8th. The French Creek at Phoenixville was again above its 8 foot flood stage from 520 p.m. EDT on the 7th through 515 a.m. EDT on the 8th. It crested at 9.83 feet at 8 p.m. EDT on the 7th.

Entire event rainfall totals included 7.07 inches in West Chester, 6.81 inches in Avondale, 6.74 inches in Spring City, 6.68 inches in Unionville, 6.19 inches in Modena and 6.17 inches in Downingtown.

A second band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams and poor drainage areas in the eastern part of Chester County during the late afternoon and early evening of the 7th. This also helped initiate and exacerbate the flooding in the Brandywine Creek Basin as well as along the Schuylkill River.

The second round of widespread heavier rain started flash flooding and flooding again across Berks County. In Reading, an evacuation alert was issued for businesses along the Schuylkill River. The boat launch on the Blue Marsh Lake was closed because of rising lake levels.

The Schuylkill River at Berne had moderate flooding, its 4th highest crest on record and its highest crest since June of 2006. The river was above its 12 foot flood stage from 9 p.m. EDT on the 7th through 536 a.m. EDT on the 9th. It crested at 15.45 feet at 1230 p.m. EDT on the 8th. Farther downstream, the Schuylkill River at Reading had moderate flooding, its third highest crest on record and greatest crest since June 28, 2006. The river was above its 15.5 foot flood stage from 755 a.m. EDT on the 8th through 947 a.m. EDT on the 9th. It crested at 20.40 feet at 630 p.m. EDT on the 8th. The Manatawny Creek at Spangsville had moderate flooding and its highest crest since October 8, 2005. It was above its 6 foot flood stage from 545 p.m. EDT on the 7th through 313 a.m. EDT on the 8th. It crested at 7.55 feet at 945 p.m. EDT on the 7th. The Tulpehocken Creek at Blue Marsh Lake was above its 307 foot flood level from 102 p.m. EDT on the 8th through 708 p.m. EDT on the 10th. It crested at 309.38 feet at 1 a.m. EDT on the 9th.

Entire event rainfall totals included 11.69 inches in Bernsville, 11.43 inches in Bethel, 9.37 inches at the Blue Marsh Dam, 8.60 inches in Hamburg, 8.37 inches in Reading, 7.81 inches at the Reading Airport and 7.58 inches in Bechtelsville and Wyomissing.

Just as the flooding from the first round of the heavier rain ended, the second round of heavier rain caused additional poor drainage flooding as well as flash flooding and flooding of creeks. This time the Delaware River flooded. Along the Delaware River, residents from fifteen homes in the River Mawr section of Yardley were evacuated. There were evacuations in Upper Makefield Township and a limited state of emergency was declared in New Hope. The New Hope-Lambertville Bridge was closed crossing the Delaware River.

The Delaware River at Reigelsville had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 22 foot flood stage from 820 p.m. EDT on the 7th through 540 a.m. EDT on the 10th. It crested at 28.06 feet at 515 a.m. EDT on the 9th. Farther downstream, the Delaware River at Frenchtown (Hunterdon County) had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 16 foot flood stage from 216 a.m. EDT on the 8th through 200 a.m. EDT on the 10th. It crested at 19.02 feet at 545 a.m. EDT on the 9th. Farther downstream, the Delaware River at Stockton (Hunterdon County) had moderate flooding, its 10th highest crest on record and highest crest since June 29, 2006. It was above its 18 foot flood stage from 240 a.m. EDT on the 8th through 337 a.m. EDT on the 10th. It crested at 21.76 feet at 645 a.m. EDT on the 8th. Farther downstream, the Delaware River at New Hope had major flooding, its 11th highest crest on record and highest crest since June 29, 2006. It was above its 13 foot flood stage from 358 a.m. EDT on the 8th through 1215 a.m. EDT on the 10th. It crested at 16.14 feet at 700 a.m. EDT on the 8th. Farther downstream, the Delaware River at Washington's Crossing had moderate flooding, its 8th highest crest on record and highest crest since June 29, 2006. It was above its 16 foot flood stage from 358 a.m. EDT on the 8th through 306 a.m. EDT on the 10th. It crested at 20.04 feet at 745 a.m. EDT on the 8th. Farther downstream, the Delaware River at Trenton (Mercer County) had moderate flooding, its 10th highest crest on record and highest crest since June 29, 2006. It was above its 20 foot flood stage from 417 a.m. EDT on the 8th through 537 a.m. EDT on the 10th. It crested at 23.11 feet at 915 a.m. EDT on the 8th.| |The East Branch of the Perkiomen Creek at Dublin had moderate flooding and was above its 5 foot flood stage from 313 a.m. EDT through 610 a.m. EDT on the 8th. It crested at 7.67 feet at 430 a.m. EDT. The Little Neshaminy Creek at Neshaminy had its second highest crest on record and highest crest since June 16, 2001. The creek was above its 8 foot flood stage from 313 a.m. EDT through 1047 a.m. EDT on the 8th. It crested at 12.95 feet at 645 a.m. EDT on the 8th. The Neshaminy Creek at Langhorne had major flooding and its 5th highest crest on record. It was above its 9 foot flood stage from 353 a.m. EDT through 1043 p.m. EDT on the 8th. It crested at 18.09 feet at 245 p.m. EDT.| |Entire event rainfall totals included 8.51 inches in Perkasie, 7.34 inches at the Doylestown Airport, 7.28 inches in Washington Crossing, 7.25 inches in Doylestown, 6.89 inches in Newtown, 6.21 inches in Sellersville, 6.17 inches in Penndel and 6.00 inches in Neshaminy Falls.

The second round of heavier rain that started on the 7th in Chester County caused additional flooding along the Brandywine Creek. The Brandywine Creek at Chadds Ford had moderate flooding and was above its 9 foot flood stage from 1110 p.m. EDT on the 7th through 326 p.m. EDT on the 8th. It crested at 11.70 feet at 615 a.m. EDT on the 8th. Entire event rainfall totals included 6.35 inches at the Philadelphia International Airport and 4.65 inches in Nether Providence Township.

The Delaware River at Tocks Island had moderate flooding, its 6th highest crest on record and highest crest since June 28, 2006. It was above its 21 foot flood stage from 151 a.m. EDT on the 8th through 752 p.m. EDT on the 9th. It crested at 24.95 feet at 2 a.m. EDT on the 9th. The Bush Kill at Shoemakers was above its 6 foot flood stage from 606 a.m. EDT through 845 a.m. EDT on the 8th. It crested at 6.16 feet at 630 a.m. EDT. The Brodhead Creek at Minisink Hills had moderate flooding, its 5th highest crest on record and highest crest since June 29, 2006. It was above its 10 foot flood stage from 545 a.m. EDT on the 8th through 356 p.m. EDT on the 9th. It crested at 12.46 feet at 1 a.m. EDT on the 9th.

Entire event rainfall totals included 6.02 inches in Blakeslee, 5.63 inches in Brodheadsville, 4.75 inches at the Mount Pocono Airport, 4.57 inches in Coolbaugh and 4.23 inches in Kresgeville.

Heavy downpours caused flash flooding along a tributary of Cobbs Creek in Haverford Township. A state of emergency was declared in the township. Vehicles were stranded and schools were closed on the 8th. A shelter was opened at the Linwood Elementary School.

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams as well as poor drainage flooding in Philadelphia. It also caused the drowning death of a 27-year-old woman who was caught in flood waters in the East Germantown section of the city. She was discovered in the rear of her Sports Utility Vehicle at the intersection of Musgrave and Haines Streets on the morning of the 8th. The Wingohocking Creek, which is a creek that was buried underground during the 19th century had its waters back out of sewer grates and manhole covers in that section of the city. Godfrey Avenue and Wister Street also flooded in East Germantown. The wall of a church also collapsed. Most gaged creeks within Philadelphia flooded as well as the Schuylkill River.

The second round of heavier rain that started overnight on the 7th produced additional widespread poor drainage, creek and river flash flooding and flooding in Philadelphia that persisted into the evening of the 8th. Major flooding occurred along most of the smaller creeks within the city. Along the Schuylkill River, Main Street in Manayunk was flooded as was Kelly Drive. Kelly Drive was not re-opened until the 11th. Along the Wissahickon Creek, Lincoln Drive was closed.| |The Schuylkill River in Philadelphia was above its 11 foot flood stage from 203 a.m. EDT through 818 p.m. EDT on the 8th. It crested at 12.53 feet at 5 a.m. EDT. The Wissahickon Creek at its mouth with the Schuylkill River had major flooding, its second highest crest on record and its highest crest since Hurricane Floyd on September 16, 1999. It was above its 5 foot flood stage from 226 a.m. EDT through 626 p.m. EDT on the 8th. It crested at 10.89 feet at 10 a.m. EDT. The Pennypack Creek at the Rhawn Street Bridge had major flooding, its fourth highest crest on record and its highest crest since Hurricane Floyd on September 16, 1999. It was above its 7 foot flood stage from 352 a.m. EDT through 220 p.m. EDT on the 8th. It crested at13.04 feet at 915 a.m. EDT on the 8th. |The Frankford Creek at Castor Avenue had major flooding and its 5th highest crest on record. It was above its 7 foot flood stage from 237 a.m. EDT through 804 a.m. EDT on the 8th. It crested at 11.39 feet at 415 a.m. EDT.|Entire event rainfall totals included 7.34 inches in Center City Philadelphia, 6.35 inches at the Philadelphia International Airport and 4.63 inches at the Northeast Philadelphia Airport.

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams and poor drainage areas in the southern part of Montgomery County. Flooding occurred along the Wissahickon Creek and continued along the Schuylkill River. In Whitpain Township, along the Wissahickon Creek, 40 residents were evacuated on West Maple Street. Two buildings collapsed in Ambler Borough.

A band of showers and thunderstorms with heavy rain caused flash flooding of smaller streams as well as poor drainage flooding in lower Bucks County. Flooding occurred in the Neshaminy Basin and the heavy rain helped exacerbate the ongoing or starting of flooding along the Delaware River. Along the Neshaminy Creek, in Langhorne, creek flooding reached the Bridgetown Mill House.

Runoff from the next round of heavy rain overnight on the 7th caused additional poor drainage and Lehigh River flooding. The Lehigh River at Walnutport (Northampton County) was above its 8 foot flood stage from 317 p.m. EDT on the 8th through 102 a.m. EDT on the 9th. It crested at 8.8 feet at 9 p.m. EDT on the 8th. Entire event rainfall totals included 7.07 inches at the Lehigh Valley International Airport in Allentown, 6.54 inches in Allentown and 6.02 inches in Schnecksville.