Pre-1900

• September 18, 1876- A tropical storm produced 50 knots (98 km/h) sustained winds in at least parts of Pennsylvania. http://www.aoml.noaa.gov/hrd/hurdat/easy_1871-80.htm#1876_2http://www.aoml.noaa.gov/hrd/hurdat/excelfiles_centerfix/1876_2.xlshttp://www.aoml.noaa.gov/hrd/hurdat/easy_1871-80.htm#1876_2http://weather.unisys.com/hurricane/atlantic/1876/2/track.gif
• September 13, 1878- A extratropical storm produced at least 70 km/h sustained winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1871-80.htm#1878_5http://www.aoml.noaa.gov/hrd/hurdat/metadata_71-80.html#1878_5
• October 24, 1878- The Gale of 1878
  Gale of 1878
  The Gale of 1878, was an intense Category 2 hurricane that caused extensive damage from Cuba to New England.-Meteorological history:A tropical storm formed off the coast of Jamaica on October 18, 1878, and moved nearly due north. On October 20, the storm reached hurricane status and on October 21,...
  
   destroys at least 700 buildings, causes $2 million in damage, kills at least ten people and injures more, and produced 80 km/h sustained winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1871-80.htm#1878_11http://www.aoml.noaa.gov/hrd/hurdat/metadata_71-80.html#1878_11http://www.aoml.noaa.gov/hrd/hurdat/excelfiles_centerfix/1878_11.xlshttp://www.hpc.ncep.noaa.gov/research/roth/galeof78.htm
• October 13, 1885- An extratropical storm produced 70 km/h sustained winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1881-90.htm#1885_8http://www.aoml.noaa.gov/hrd/hurdat/metadata_81-90.html#1885_8
• August 22, 1888- A tropical storm produced 75 km/h sustained winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1881-90.htm#1888_3http://www.aoml.noaa.gov/hrd/hurdat/metadata_81-90.html#1888_3http://www.aoml.noaa.gov/hrd/hurdat/excelfiles_centerfix/1888/STORM3.XLS
• August 29, 1893- A tropical storm produced 100 km/h sustained winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1891-00.htm#1893_6http://www.aoml.noaa.gov/hrd/hurdat/metadata_91-00.html#1893_6http://www.aoml.noaa.gov/hrd/hurdat/excelfiles_centerfix/1893/1893_6.XLS
• October 25, 1893- A tropical storm produced 65 km/h sustained winds. http://www.aoml.noaa.gov/hrd/hurdat/easy_1891-00.htm#1893_11http://www.aoml.noaa.gov/hrd/hurdat/metadata_91-00.html#1893_11
• September 30, 1896- An extratropical storm produced 95-100 km/h sustained winds. http://www.aoml.noaa.gov/hrd/hurdat/easy_1891-00.htm#1896_4http://www.aoml.noaa.gov/hrd/hurdat/metadata_91-00.html#1896_4
• November 1, 1899- An extratropical storm produced 95 km/h sustained winds. http://www.aoml.noaa.gov/hrd/hurdat/easy_1891-00.htm#1899_8http://www.aoml.noaa.gov/hrd/hurdat/metadata_91-00.html#1899_8

1900-1950

• June 29, 1902- A extratropical storm caused 65 knots (127.4 km/h) winds throughout the state. http://www.aoml.noaa.gov/hrd/hurdat/easy_1901-10.htm#1902_2http://www.aoml.noaa.gov/hrd/hurdat/metadata_01-10.html#1902_2
• September 16, 1903- The Vagabond Hurricane affects Pennsylvania as a tropical storm with winds of 50-65 km/h, after making landfall in New Jersey
  New Jersey
  New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...
  
   with hurricane force winds. http://www.aoml.noaa.gov/hrd/hurdat/easy_1901-10.htm#1903_4http://www.aoml.noaa.gov/hrd/hurdat/metadata_01-10.html#1903_4
• August 4, 1915- A tropical depression caused winds of 45 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1915-30.htm#1915_1
• October 1, 1915- An extratropical storm caused winds of 65 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1915-30.htm#1915_5
• October 24, 1923- An extratropical storm caused winds of 75 km/h.http://www.aoml.noaa.gov/hrd/hurdat/easy_1915-30.htm#1923_4
• September 20, 1928- An extratropical storm caused winds of 75 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1915-30.htm#1928_4
• October 3, 1929- An extratropical storm caused winds of 55 km/h.http://www.aoml.noaa.gov/hrd/hurdat/easy_1915-30.htm#1929_2
• September 21, 1932- A tropical depression caused winds of 30 km/h.http://www.aoml.noaa.gov/hrd/hurdat/easy_1931-40.htm#1932_6
• August 24, 1933- A tropical storm caused winds of 85 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1931-40.htm#1933_8
• August 19, 1939- A tropical depression caused winds of 45 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1931-40.htm#1939_2
• September 19, 1945- An extratropical storm caused winds of 45 km/h.http://www.aoml.noaa.gov/hrd/hurdat/easy_1941-50.htm#1945_9
• August 29, 1949- An tropical storm caused winds of 65 km/h. http://www.aoml.noaa.gov/hrd/hurdat/easy_1941-50.htm#1949_2

1951-2000

• September 1, 1952- Tropical Storm Able affects Pennsylvania as a tropical storm and tropical depression after making landfall in South Carolina
  South Carolina
  South Carolina is a state in the Deep South of the United States that borders Georgia to the south, North Carolina to the north, and the Atlantic Ocean to the east. Originally part of the Province of Carolina, the Province of South Carolina was one of the 13 colonies that declared independence...
  
   as a hurricane. http://www.aoml.noaa.gov/hrd/hurdat/easy_1951-60.htm#1952_2
• October 15, 1954- Hurricane Hazel
  Hurricane Hazel
  Hurricane Hazel was the deadliest and costliest hurricane of the 1954 Atlantic hurricane season. The storm killed as many as 1,000 people in Haiti before striking the United States near the border between North and South Carolina, as a Category 4 hurricane...
  
  causes hurricane force winds and small portions with 6 inches (152.4 mm) or more of rain.http://www.hpc.ncep.noaa.gov/tropical/rain/hazel1954.html
• August, 1955- Hurricanes Connie
  Hurricane Connie
  Hurricane Connie was the first in a series of hurricanes to strike North Carolina during the 1955 Atlantic hurricane season. Connie struck as a Category 1, causing major flooding and inflicting extensive damage to the Outer Banks and inland to Raleigh....
  
  and Diane
  Hurricane Diane
  Hurricane Diane was one of three hurricanes to hit North Carolina during the 1955 Atlantic hurricane season, striking an area that had been hit by Hurricane Connie five days earlier...
  
  both cause as much as 10 inches (254 mm) of rain and tropical storm force winds.
• June 21-June 22, 1972- Hurricane Agnes
  Hurricane Agnes
  Hurricane Agnes was the first tropical storm and first hurricane of the 1972 Atlantic hurricane season. A rare June hurricane, it made landfall on the Florida Panhandle before moving northeastward and ravaging the Mid-Atlantic region as a tropical storm...
  
  caused rain and some winds. It caused widespread rains of 6 to 12 inches (304.8 mm) with local amounts up to 19 inches (482.6 mm).http://www.hpc.ncep.noaa.gov/tropical/rain/tcmaxima.html
• September 6, 1979- Tropical Storm David
  Hurricane David
  Hurricane David was the fourth named tropical cyclone, second hurricane, and first major hurricane of the 1979 Atlantic hurricane season. A Category 5 hurricane on the Saffir-Simpson Hurricane Scale, David was among the deadliest hurricanes in the latter half of the 20th century, killing...
  
  causes tropical storm force winds and at least 5 inches of rain.http://www.hpc.ncep.noaa.gov/tropical/rain/david1979.html
• September, 1987- Tropical Depression Nine brings at least 5 inches of rain to part of the state.http://www.hpc.ncep.noaa.gov/tropical/rain/td9of1987.html
• September 26, 1992- Tropical Storm Danielle
  Tropical Storm Danielle (1992)
  Tropical Storm Danielle was a weak tropical storm that made landfall on Virginia in the 1992 Atlantic hurricane season. The fourth storm of the season, Danielle was one of two Atlantic storms in the year to make landfall in the United States, the other being Hurricane Andrew. It formed out of a...
  
  causes tropical storm force winds
• August 18, 1994- Tropical Depression Beryl causes some rain and tropical depression winds
• August 29-August 31, 1999- Hurricane Dennis
  Hurricane Dennis (1999)
  Hurricane Dennis was an Atlantic hurricane that affected the Bahamas and parts of the Mid-Atlantic and Northeast during the 1999 Atlantic hurricane season. The fifth tropical cyclone, fourth tropical storm, and third hurricane of the season, Dennis originated from a tropical wave that passed north...
  
  causes tropical depression force winds and five inches (127 mm) of rain

• September 16, 1999- Tropical Storm Floyd
  Hurricane Floyd
  Hurricane Floyd was the sixth named storm, fourth hurricane, and third major hurricane in the 1999 Atlantic hurricane season. Floyd triggered the third largest evacuation in US history when 2.6 million coastal residents of five states were ordered from their homes as it approached...
  
  causes 6 deaths in Pennsylvania, and 10 inches (254 mm) of rain in the eastern part of the state. It produced a 2.8 ft (0.85344 m) storm surge in Philadelphia.http://lwf.ncdc.noaa.gov/oa/climate/extremes/1999/september/extremes0999.html

2000 onwards

• June 16, 2001- Tropical Storm Allison causes rain and extensive damage. At its height, there was 10 inches of rain in some parts of the Philadelphia area. Some 241 homes were destroyed, at least 1,300 majorly damaged, and 3 buildings of an Apartment Complex caught fire due to an explosion. A total of 7 lives were lost in the Philadelphia area.
• September, 2003- Tropical Storm Henri
  Tropical Storm Henri (2003)
  Tropical Storm Henri was weak a tropical storm that formed in the 2003 Atlantic hurricane season. The eighth storm of the season, Henri was one of six tropical cyclones to hit the United States in the year. Henri formed from a tropical wave in the Gulf of Mexico in early September, and crossed over...
  
  's remnants causes rain and $3.5 million in damage. 12 homes were destroyed, 380 majorly damaged and 109,000 PECO customers were without power. http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~519026
• September 17, 2003- Hurricane Isabel
  Hurricane Isabel
  Hurricane Isabel was the costliest and deadliest hurricane in the 2003 Atlantic hurricane season. The ninth named storm, fifth hurricane, and second major hurricane of the season, Isabel formed near the Cape Verde Islands from a tropical wave on September 6 in the tropical Atlantic Ocean...
  
  causes one death in Lancaster County
  Lancaster County, Pennsylvania
  Lancaster County, known as the Garden Spot of America or Pennsylvania Dutch Country, is a county located in the southeastern part of the Commonwealth of Pennsylvania, in the United States. As of 2010 the population was 519,445. Lancaster County forms the Lancaster Metropolitan Statistical Area, the...
  
   and brings strong winds to parts of the state.

• September 1-2, 2006- Tropical Depression Ernesto
  Hurricane Ernesto (2006)
  Hurricane Ernesto was the costliest tropical cyclone of the 2006 Atlantic hurricane season. The sixth tropical storm and first hurricane of the season, Ernesto developed from a tropical wave on August 24 in the eastern Caribbean Sea...
  
  caused 2.5 to 3 in (40 to 75 mm) of rain in parts of the south-western portion of the state.
• June 4, 2007- Tropical Depression Barry
  Tropical Storm Barry (2007)
  Tropical Storm Barry was a rapidly-forming tropical cyclone that made landfall on Florida, United States, in early June 2007. The second named storm of the 2007 Atlantic hurricane season, Barry developed from a trough of low pressure in the southeastern Gulf of Mexico on June 1...
  
  caused 1.66 inches (42.2 mm) of rain, reported at Philadelphia International Airport
  Philadelphia International Airport
  Philadelphia International Airport is a major airport in Philadelphia, Pennsylvania, United States, and is the largest airport in the Delaware Valley region and in Pennsylvania...
  
  .http://www.hpc.ncep.noaa.gov/tropical/BARRY/BARRY_14.html

• September 6, 2008- Tropical Storm Hanna
  Hurricane Hanna (2008)
  Hurricane Hanna was the deadliest storm of the 2008 Atlantic hurricane season. The storm was the eighth tropical cyclone and fourth hurricane of the 2008 Atlantic hurricane season. It formed east-northeast of the northern Leeward Islands on August 28...
  
  an EF1 tornado was confirmed that touched down in Allentown, Pennsylvania
  Allentown, Pennsylvania
  Allentown is a city located in Lehigh County, Pennsylvania, in the United States. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh, and the 215th largest city in the United States. As of the 2010 census, the city had a total population of 118,032 and is currently...
  
  
• September 14, 2008- Hurricane Ike
  Hurricane Ike
  Hurricane Ike was the second-costliest hurricane ever to make landfall in the United States, the costliest hurricane ever to impact Cuba and the second most active hurricane to reach the Canadian mainland in the Great Lakes Region after Hurricane Hazel in 1954...
  
  caused 180,000 people without power in Western Pennsylvania, wind gusts over 70 mph, and other wind damage. Also, in Oil City, one death took place as a result of a fallen tree limb while outdoors. That same day, there was a state of emergency for Pennsylvania.
• August 28, 2011- Hurricane Irene
  Hurricane Irene (2011)
  Hurricane Irene was a large and powerful Atlantic hurricane that left extensive flood and wind damage along its path through the Caribbean, the United States East Coast and as far north as Atlantic Canada in 2011...
  
  left 706,000 people without power in Eastern Pennsylvania, claimed three lives in Northhampton County, Luzerne County, and Pocono Township. Flood waters raised the Schuylkill River to levels not seen in 140 years. Philadelphia Mayor Michael Nutter declared a state of emergency for the first time since 1986. Hurricane Irene brought lashing rain and wind gusts of up to 54 mph at the Philadelphia International Airport. Tornado warnings were issued in southeastern Pennsylvania, although no tornadoes were reported. Irene also brought winds of nearly 70 mph along the coast and 40 to 60 mph inland. The storm left five people dead in the state.
• September 5, 2011- The remnants of Tropical Storm Lee
  Tropical Storm Lee (2011)
  Tropical Storm Lee was the twelfth named storm and thirteenth system overall of the 2011 Atlantic hurricane season, developing from a broad tropical disturbance over the Gulf on September 1. It was designated as Tropical Storm Lee the next day...
  
  brought over 6 to 10 inches of rain in Pennsylvania, some areas over 14 inches. Lee's leftovers spread into the Mid-Atlantic and Northeast, in some areas causing severe flooding, and record rainfalls thoughout much of Eastern Pennsylvania. On September 7, 2011 Emergency management officials in Northumberland County, Bradford County, Susquehanna County, Columbia County, and Luzerne County declared a state of emergency, and mandatory evacuations because of major flooding, also school closings were in effect due to rising river levels. County officials determined there were numerous roads that were covered by water or washed out. There were a also number of bridges affected by high water. In parts of Wilkes-Barre, Pennsylvania, severe flooding hasn't been seen since Hurricane Agnes of 1972.