For the second time within a week heavy rain fell across Eastern Pennsylvania. An additional 1.5 to 5 inches of precipitation fell and caused more widespread river, stream and poor drainage flooding including the Delaware, Lehigh and Schuylkill Rivers. On average moderate flooding occurred on the Lehigh River, with several locations recording top ten crests. Generally minor flooding occurred on the Delaware and Schuylkill Rivers. Snowmelt in the upper reaches of the Lehigh and Delaware Basins contributed ti the flooding. The worst reported damage was along the towpaths of the Lehigh River in Northampton County and the Delaware River in Bucks County. The heaviest precipitation amounts occurred in the Poconos, while the lightest precipitation amounts occurred in and around Philadelphia. Precipitation started during the late evening of the 9th, fell heavy at times during the daylight hours and evening on the 10th and ended between 3 a.m. EST and 6 a.m. EST on the 11th.

The heavy rain was caused by a low pressure system that moved from the Southern Plains on the morning of the 8th northeast into Iowa on the morning of the 9th, Michigan on the morning of the 10th and into the eastern Great Lakes by the morning of the 11th. This system was able to tap moisture from both the Gulf of Mexico and Atlantic Ocean and lift it over its frontal boundaries. The deep southeast flow was able to enhance the precipitation further over the higher terrain of Eastern Pennsylvania. The rain ended once the low's occluded front moved through Pennsylvania on the 11th.

Flood in MONROE, PENNSYLVANIA
From 10-MAR-11 23:21:00 to 12-MAR-11 09:56:00 (EST-5)
Location: SHOEMAKERS
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Delaware River at Tocks Island was above its 21 foot flood stage from 416 p.m. EST on the 11th through 956 a.m. EST on the 12th. It crested at 22.88 feet at 1245 a.m. EST on the 11th. The Lehigh River at Stoddartsville was above its 7 foot flood stage from 502 a.m. EST through 154 p.m. EST on the 11th. It crested at 7.65 feet at 815 a.m. EST on the 11th. The Brodhead Creek at Analomink was above its 8 foot flood stage from 1121 p.m. EST on the 10th through 639 a.m. EST on the 11th. It crested at 8.86 feet at 3 a.m. EST on the 11th. Farther downstream, the Brodhead Creek at Minisink Hills flooded twice, the first time from the upstream runoff and the second time from being backed up by the Delaware River. The creek was above its 10 foot flood stage from 159 a.m. EST through 822 a.m. EST on the 11th and again from 647 p.m. EST on the 11th through 533 a.m. EST on the 12th. The first and higher crest of 10.71 feet occurred at 515 a.m. EST on the 11th. The second and lower crest occurred at 1115 p.m. EST on the 11th. The Pohopoco Creek at Kresgeville was above its 8.5 foot flood stage from 341 a.m. EST through 813 a.m. EST on the 11th. It crested at 8.77 feet at 615 a.m. EST. The Bush Kill at Shoemakers was above its 6 foot flood stage from 230 a.m. EST through 1022 p.m. EST on the 11th. It crested at 6.90 feet at 930 a.m. EST. The Tobyhanna Creek at Blakeslee had major flooding and was above its 10 foot flood stage from 1221 a.m. EST through 1100 p.m. EST on the 11th. It crested at 12.04 feet at 1000 a.m. EST on the 11th.
Precipitation event totals included 5.08 inches in Mount Pocono, 4.45 inches in Coolbaugh, 4.14 inches in Blakeslee and 3.05 inches in East Stroudsburg.

Flood in PHILADELPHIA, PENNSYLVANIA
From 11-MAR-11 07:45:00 to 11-MAR-11 10:30:00 (EST-5)
Location: ROXBOROUGH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Schuylkill River in Philadelphia was above its 11 foot flood stage from 745 a.m. EST through 1030 a.m. EST on the 11th. It crested at 11.03 feet at 830 a.m. EST on the 11th. The combination of the up the Delaware Bay and River wind flow and freshwater runoff produced minor tidal flooding along the Delaware River and tidal sections of its tributaries during the late afternoon high tide cycle on the 10th and the early morning high tide cycle on the 11th. The highest tide occurred on the 11th and reached 9.01 feet above mean lower low water in Philadelphia. Minor tidal flooding starts at 8.20 feet above mean lower low water. Moderate tidal flooding starts at 9.20 feet above mean lower low water.
Event precipitation amounts included 1.92 inches in Wyndmoor, 1.46 inches at the Philadelphia International Airport and 1.27 inches in Rockledge.

Flood in CHESTER, PENNSYLVANIA
From 10-MAR-11 16:59:00 to 12-MAR-11 02:35:00 (EST-5)
Location: CEDARVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flooding along the Brandywine Creek and its branches affected Creek Road in Birmingham, Pennsylvania State Route 926 in Pocopson and Birmingham, U.S. Route 1 in Chadds Ford and Pennsybury Township and Chestnut Street in Downingtown. Unionville Schools were closed because of flooded roadways along the creek. In East Conventry Township, the Schuylkill River flooded Towpath Park. Flooding also occurred along Pigeon Creek within the township. Pennsylvania State Route 724 near Pottstown (Montgomery County) was also flooded by the Schuylkill. In West Chester, poor drainage flooding closed Montgomery Avenue.
The Schuylkill River at Pottstown (Montgomery County) was above its 13 foot flood stage from 740 a.m. EST on the 11th through 235 a.m. EST on the 12th. It crested at 14.13 feet at 730 p.m. EST on the 11th. The West Branch of the Brandywine Creek at Honeybrook had moderate flooding and was above its 7 foot flood stage from 459 p.m. EST on the 10th through 234 a.m. EST on the 11th. It crested at 9.34 feet at 1030 p.m. EST on the 10th. Farther downstream, the West Branch of the Brandywine Creek at Coatesville was above its 7 foot flood stage from 830 p.m. EST on the 10th through 351 a.m. EST on the 11th. It crested at 7.25 feet at 200 a.m. EST on the 11th. The East Branch of the Brandywine Creek below Downingtown had moderate flooding. The creek was above its 7 foot flood stage from 511 p.m. EST on the 10th through 716 a.m. EST on the 11th. It crested at 10.67 feet at 1215 a.m. EST on the 11th. The main stem of the Brandywine Creek at Chadds Ford had moderate flooding. The creek was above its 9 foot flood stage from 920 p.m. EST on the 10th through 511 p.m. EST on the 11th. It crested at 11.88 feet at 645 a.m. EST on the 11th. The French Creek at Phoenixville was above its 8 foot flood stage from 857 p.m. EST on the 10th through 951 a.m. EST on the 11th. It crested at 8.96 feet at 315 a.m. EST on the 11th. The Valley Creek at Valley Forge was above its 7 foot flood stage from 951 p.m. EST on the 10th through 1243 a.m. EST on the 11th. It crested at 7.44 feet at 1115 p.m. EST on the 10th.
Event precipitation totals included 3.30 inches in Northbrook, 3.07 inches in Downingtown, 2.94 inches in West Chester, 2.84 inches in Exton, 2.81 inches in Unionville, 2.60 inches in Honey Brook and 2.52 inches in Valley Forge.

Flood in BERKS, PENNSYLVANIA
From 10-MAR-11 19:03:00 to 11-MAR-11 20:04:00 (EST-5)
Location: WEST HAMBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

In addition to the Schuylkill and Manatawny flooding, flooding along the Monocacy Creek closed Monocacy Creek Road in Amity Township. The Schuylkill River at Berne had moderate flooding and was above its 12 foot flood stage from 1019 p.m. EST on the 10th through 526 p.m. EST on the 11th. It crested at 14.20 feet at 6 a.m. EST on the 11th. Farther downstream, the Schuylkill River at Reading was above its 13 foot flood stage from 412 a.m. EST through 804 p.m. EST on the 11th. It crested at 15.01 feet at 1230 p.m. EST on the 11th. While classified as minor, the flooding was still the 10th highest on record and the highest since June of 2006. The Manatawny Creek at Spangville was above its 6 foot flood stage from 703 p.m. EST on the 10th through 802 a.m. EST on the 11th. It crested at 6.93 feet at 145 a.m. EST on the 11th.
Event precipitation totals 3.03 inches in Bethel, 2.70 inches in Bernville, 2.69 inches in Bechtelsville, 2.63 inches in Reading, 2.42 inches in Wyomissing and 2.36 inches in Fleetwood.

Flood in DELAWARE, PENNSYLVANIA
From 10-MAR-11 21:20:00 to 11-MAR-11 17:11:00 (EST-5)
Location: CHADDS FORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flooding along the Brandywine Creek closed the Chadds Ford Township schools because of flooded roadways along the creek. The Brandywine Creek at Chadds Ford had moderate flooding. The creek was above its 9 foot flood stage from 920 p.m. EST on the 10th through 511 p.m. EST on the 11th. It crested at 11.88 feet at 645 a.m. EST on the 11th. The Chester Creek in Chester briefly was above its 8 foot flood stage from 11 p.m. EST on the 10th through 1203 a.m. EST on the 11th. It crested at 8.05 feet at 1130 p.m. EST on the 10th. Crum Creek at Newtown Square was above its 6 foot flood stage from 939 p.m. EST on the 10th through 205 a.m. EST on the 11th. It crested at 6.43 feet at 10 p.m EST on the 10th.
Event precipitation totals included 1.89 inches in Media and 1.88 inches in Drexel Hill.

Flood in BUCKS, PENNSYLVANIA
From 11-MAR-11 04:43:00 to 11-MAR-11 10:00:00 (EST-5)
Location: LANGHORNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Neshaminy Creek at Langhorne was above its 9 foot flood stage from 443 a.m. EST through 10 a.m. EST on the 11th. It crested at 9.51 feet at 730 a.m. EST.
Precipitation event totals included 2.18 inches in Furlong, 2.08 inches in Doylestown and 1.42 inches in Penndel.

Flood in MONTGOMERY, PENNSYLVANIA
From 10-MAR-11 22:37:00 to 12-MAR-11 02:35:00 (EST-5)
Location: EAST GREENVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Schuylkill River flooded Riverfront Park in Pottstown. It also forced the closure of Keim Street. Also in Pottstown, the High Street Bridge over the Manatawny Creek was closed. In New Hanover Township, the Middle Creek flooded Ludwig and Sassamanville Roads.
The Schuylkill River at Pottstown was above its 13 foot flood stage from 740 a.m. EST on the 11th through 235 a.m. EST on the 12th. It crested at 14.13 feet at 730 p.m. EST on the 11th. The East Branch of the Perkiomen Creek at Schwenksville was above its 7 foot flood stage from 202 a.m. EST through 707 a.m. EST on the 11th. It crested at 7.58 feet at 445 a.m. EST. The main stem of the Perkiomen Creek at East Greenville was above its 4 foot flood stage from 1037 p.m. EST on the 10th through 557 a.m. EST on the 11th. It crested at 4.42 feet at 300 a.m. EST on the 11th. The Wissahickon Creek at Fort Washington was above its 11 foot flood stage from 1245 a.m. EST through 307 a.m. EST on the 11th. It crested at 9.30 feet at 200 a.m. EST.
Event precipitation totals included 2.59 inches in Pottstown, 2.14 inches in Ardmore, 2.10 inches in Wynnewood, 2.04 inches in Gilbertsville, 2.00 inches in Spring Mount, 1.98 inches in Hatfield, 1.96 inches in Schwenksville, 1.87 inches in Ambler and 1.78 inches in Collegeville.

Flood in CARBON, PENNSYLVANIA
From 10-MAR-11 22:50:00 to 11-MAR-11 23:00:00 (EST-5)
Location: LEHIGHTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The flooding Lehigh River destroyed fencing in Weissport. Sections of the Lehigh Canal Towpath were washed away and closed. In Lehighton, flooding along the Mahoning Creek covered walking paths in the Bear Creek Memorial Park. The Lehigh River at Lehighton had moderate flooding and was above its 10 foot flood stage from 1050 p.m. EST on the 10th through 1042 a.m. EST on the 11th. It crested at 12.95 feet at 345 a.m. EST on the 11th. This was the 8th highest crest on record. The Pohopoco Creek at Kresgeville (Monroe County) was above its 8.5 foot flood stage from 341 a.m. EST through 813 a.m. EST on the 11th. It crested at 8.77 feet at 615 a.m. EST. The Tobyhanna Creek at Blakeslee (Monroe County) had major flooding and was above its 10 foot flood stage from 1221 a.m. EST through 1100 p.m. EST on the 11th. It crested at 12.04 feet at 1000 a.m. EST on the 11th. The Aquashicola Creek at Palmerton was above its 7 foot flood stage from 458 a.m. EST through 101 p.m. EST on the 11th. It crested at 7.59 feet at 830 a.m. EST.
Event precipitation totals included 4.25 inches in Jim Thorpe, 4.22 inches in Bowmanstown, 4.13 inches in Coalsdale, 3.89 inches in Weatherly and 3.86 inches in Lehighton.

Flood in LEHIGH, PENNSYLVANIA
From 10-MAR-11 21:55:00 to 11-MAR-11 20:27:00 (EST-5)
Location: SLATINGTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

In Allentown, flooding along the Little Lehigh and Trout Creeks closed parts of Third, Fourth and Union Streets on the morning of the 11th. One motorist became stuck in flood waters on Fourth Street and had to be rescued. Residents living on the island within the Lehigh River were evacuated.
The Lehigh River at Walnutport (Northampton County) had moderate flooding and was above its 8 foot flood stage from 955 p.m. EST on the 10th through 827 p.m. EST on the 11th. It crested at 12.72 feet at 545 a.m. EST on the 11th.  It was the third highest crest on record at Walnutport and the highest crest since August of 1955. Farther downstream, the Lehigh River at Bethlehem was above its 16 foot flood stage from 713 a.m. EST through 229 p.m. EST on the 11th. It crested at 17.17 feet at 11 a.m. EST on the 11th.
Event precipitation totals included 2.76 inches in Schnecksville, 2.63 inches in Slatington and 2.58 inches at the Lehigh Valley International Airport.

Flood in NORTHAMPTON, PENNSYLVANIA
From 10-MAR-11 21:55:00 to 12-MAR-11 17:38:00 (EST-5)
Location: WALNUTPORT
Flood cause: Heavy Rain / Snow Melt
Property damage: 1.75M
Crop damage: 0.00K
Reported by: River/Stream Gage

Northampton County was affected by the one two combination of flooding along the Lehigh and Delaware Rivers.  Flooding along these rivers also caused smaller streams and rivers to back up and flood. The flooding also caused considerable damage along the towpaths of both the Lehigh and Delaware River Canals. In Bethlehem, flooding along the Lehigh River forced the evacuation of about 100 residents along Wilson Avenue. While homes were not affected, sections of Wilson Avenue as well as Sculac and Farmersville Roads were impassable. Evacuations also occurred along the Monocacy Creek in Bethlehem's Colonial Industrial Quarter. In Easton, dozens of people were evacuated along Bushkill Drive after the Bushkill Creek flooded. Homes suffered basement flooding. Larry Holmes and Lehigh Drives were closed along the Lehigh River. Pennsylvania State Route 611 South was closed along the Delaware River. Most of the roads were reopened on the 12th.
Flooding along the Lehigh and Delaware Rivers caused considerable damage along the Lehigh Canal Towpath and the Delaware Canal Towpath into Bucks County. Along the Lehigh River, the damage was caused more by the strength of the current than the crest itself. Along the Lehigh River, in Walnutport a one hundred fifty foot section of a wall collapsed and a half mile section of the towpath was damaged. In Freemansburg, damage was described as worse than what occurred during the 2004 flooding with Ivan. Trail surfaces were washed away and foundations exposed. The river scoured the towpath down to the original clay base from 1828. In Bethlehem, about seventy-five percent of a three mile stretch of the towpath was damaged. There were washouts on two bridges.  The Delaware Canal State Park suffered surface damage and washouts and was closed from Easton to Wy Hit Tuk Park in Williams Township.  From Wy Hit Tuk Park south to Upper Black Eddy in Bucks County, the trail was passable by foot, but not by bike.
The Delaware River at Easton had moderate flooding. The river was above its 22 foot flood stage from 914 a.m. EST on the 11th through 538 p.m. EST on the 12th. It crested at 26.11 feet at 1245 a.m. EST on the 12th. The Lehigh River at Walnutport (Northampton County) had moderate flooding and was above its 8 foot flood stage from 955 p.m. EST on the 10th through 827 p.m. EST on the 11th. It crested at 12.72 feet at 545 a.m. EST on the 11th. It was the third highest crest on record at Walnutport and the highest crest since August of 1955. Farther downstream, the Lehigh River at Bethlehem had minor flooding and was above its 16 foot flood stage from 713 a.m. EST through 229 p.m. EST on the 11th. It crested at 17.17 feet at 11 a.m. EST on the 11th. Farthest downstream, the Lehigh River at Glendon had major flooding and its highest crest since June of 2006. The river was above its 19 foot flood stage from 426 a.m. EST on the 11th through 1245 a.m. EST on the 12th. It crested at 22.49 feet at 1130 a.m. EST on the 11th.
Event precipitation totals included 4.02 inches in Walnutport, 2.61 inches in Nazareth, 2.60 inches in Plainfield, 2.55 inches in Glendon and 2.21 inches in Martins Creek.

Flood in BUCKS, PENNSYLVANIA
From 11-MAR-11 10:41:00 to 12-MAR-11 18:25:00 (EST-5)
Location: RIEGELSVILLE
Flood cause: Heavy Rain / Snow Melt
Property damage: 250.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Delaware River flooding caused basement flooding along Waterloo Street in New Hope. In Yardley, North Delaware Avenue was flooded and closed. Residents moved their vehicles to the west side of the Delaware Canal. Damage occurred along the Delaware River Canal Towpath. Between Upper Black Eddy and Wy Hit Tuk Park in Northampton County, the towpath was only accessible by foot and not bike. A lock wall from 1832 collapsed in Lumberville. The towpath collapsed on Mechanics Street in New Hope.
The Delaware River had minor flooding along its length in Bucks County south through Yardley. From north to south: The Delaware River at Riegelsville was above its 22 foot flood stage from 1041 a.m. EST on the 11th through 625 p.m. EST on the 12th. It crested at 25.20 feet at 145 a.m. EST on the 12th. Farther south, the Delaware River at Frenchtown (Hunterdon County) was above its 16 foot flood stage from 330 p.m. EST on the 11th through 348 p.m. EST on the 12th. It crested at 17.21 feet at 300 a.m. EST on the 11th. The Delaware River at Stockton (Hunterdon County) was above its 18 foot flood stage from 622 p.m. EST on the 11th through 415 p.m. EST on the 12th. It crested at 19.14 feet at 515 a.m. EST on the 12th. The Delaware River at New Hope was above its 13 foot flood stage from 340 a.m. EST through 755 a.m. EST on the 12th. It crested at 13.07 feet at 530 a.m. EST. The Delaware River at Trenton (Mercer County) was above its 20 foot flood stage from 1015 p.m. EST on the 11th through 403 p.m. EST on the 12th. It crested at 20.59 feet at 730 a.m. EST on the 12th. The Neshaminy Creek at Langhorne was above its 9 foot flood stage from 443 a.m. EST through 10 a.m. EST on the 11th. It crested at 9.51 feet at 730 a.m. EST.
Precipitation event totals included 2.18 inches in Furlong, 2.08 inches in Doylestown and 1.42 inches in Penndel.