A cold front stalled across the region on March 1st. Meanwhile, a wave of low pressure developed along this front in the Ohio Valley and move eastward,  explosively deepening just southeast of Long Island on March 2nd. This large and very deep area of low pressure moved slowly east over the open waters of the North Atlantic Ocean through Sunday March 4th. This led to a variety of weather hazards during this time frame.
Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region. There was one fatality in Upper Merion Township, Montgomery County, PA, when a tree fell on a vehicle.
Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.
As the rain changed to snow on the 2nd, localized heavy snowfall occurred, particularly over the higher elevations. Southeast of Interstate 95, up to around 3 inches of snowfall was observed. To the northwest of Interstate 95, nearly 6 inches of snow was measured with localized amounts of around 9 inches. Higher elevations mainly to the north of Interstate 80 generally reported greater than 9 inches of snow, with amounts up to 24 inches above 2,000 feet.
On Friday night, March 2nd, Governor Tom Wolf activated the Pennsylvania National Guard to support local response to the storm.

Winter Storm in MONROE, PENNSYLVANIA
From 02-MAR-18 05:00:00 to 02-MAR-18 18:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of near 2 feet in the higher elevations, and around one-half foot in many valley locations.  Representative snowfall reports include 23.6 inches in Coolbaugh Township, 20.0 inches in Tobyhanna, 17.0 inches in Mount Pocono, 15.0 inches in Blakeslee, and 4.4 inches near Rossland.  5.5 inches in Albrightsville, and 2.0 inches in Jim Thorpe. Wind gusts to near 60 MPH (higher elevations), and 50 MPH (lower elevations) caused whiteout conditions during the afternoon and evening commute on March 2nd.  Stranded motorists were reported throughout the county, including along I-80 which remained closed for more than 24 hours between exits 284 (Blakeslee) and 293 (interchange with I-380).  Portions of I-84 and I-380 were closed as well.  The Red Cross opened several shelters and warming centers.

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 02-MAR-18 11:00:00 to 02-MAR-18 19:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to one-half foot feet throughout the county.  Representative snowfall reports include 6.0 inches in Hellertown, 5.6 inches in Bethlehem, 5.5 inches in Cherry Hill, and 3.2 inches in Martins Creek.  Wind gusts up to 60 MPH were common (a trained spotter at Bushkill Center reported a gust of 60 MPH at 1152EST on March 2nd) causing whiteout conditions during the afternoon and evening commute on March 2nd.

Winter Storm in EASTERN MONTGOMERY, PENNSYLVANIA
From 02-MAR-18 12:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to 10 inches in eastern sections of the county not far from the Philadelphia City boundary under a deformation zone that established itself over the area during the storm.  9.5 inches of snow was reported in Bryn Mawr, 9.0 inches in Plymouth Meeting, 8.0 inches in North Wales, 5.5 inches in Lansdale, and 2.3 inches in King of Prussia.  A wind gust of 46 MPH was reported at the Limerick Airport near Pottstown at 1712EST on March 2nd.
Blowing and drifting snow made travel hazardous Friday afternoon and evening.

High Wind in WESTERN CHESTER, PENNSYLVANIA
From 02-MAR-18 15:00:00 to 02-MAR-18 15:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Newspaper

Downed trees and wires were reported across the area. A wind gust of 53 mph was recorded by the AWOS unit in Coatesville at 1555EST on March 2nd.

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 02-MAR-18 11:00:00 to 02-MAR-18 20:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of less than one-half foot feet in the southern portions of the county. 2.7 inches of snow was reported in Furlong, 1.0 inches in Penndel, and 0.7 inches near Langhorne. A wind gust of 48 MPH at 1532EST was reported in Yardley. Blowing and drifting snow made travel hazardous Friday afternoon and evening.

High Wind in LOWER BUCKS, PENNSYLVANIA
From 02-MAR-18 15:00:00 to 02-MAR-18 15:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Newspaper

Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region.  At one point more than 18,000 customers were without power in Bucks County. A wind gust of 48 MPH was reported in Newtown at 1655EST on March 2nd.
Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.

High Wind in WESTERN MONTGOMERY, PENNSYLVANIA
From 02-MAR-18 17:00:00 to 02-MAR-18 17:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Newspaper

Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region.  At one point more than 115,000 customers were without power in Montgomery County.

Winter Storm in CARBON, PENNSYLVANIA
From 02-MAR-18 05:00:00 to 02-MAR-18 18:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a reported depth of 5.5 inches in Albrightsville, and 2.0 inches in Jim Thorpe. Wind gusts to near 60 MPH (higher elevations), and 50 MPH (lower elevations) caused whiteout conditions during the afternoon and evening commute on March 2nd. I-80 was closed for more than 12 hours. Widespread power outages and significant tree damage was reported throughout the county.

Winter Storm in DELAWARE, PENNSYLVANIA
From 02-MAR-18 12:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to 10 inches under a deformation zone that established itself over the area during the storm.  9.5 inches of snow was reported in Wayne, 9.0 inches in Villanova, 7.0 inches in Newtown Square, 6.0 inches in Media, and 4.3 inches in Springfield.  A wind gust of 59 MPH was reported at Philadelphia International Airport at 2224EST on March 2nd, and a wind gust of 56 MPH was reported in Newtown Square at 1921EST.  Blowing and drifting snow made travel hazardous Friday afternoon and evening.

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 02-MAR-18 13:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Trained Spotter

A wet snow accumulated to a depth of up to 2 inches in the western portion of the county.
1.2 inches of snow was reported in Glenmoore. A wind gust of 53 MPH was reported in Coatsville at 1555EST on March 2nd.

High Wind in PHILADELPHIA, PENNSYLVANIA
From 02-MAR-18 15:13:00 to 02-MAR-18 15:13:00 (EST-5)
Magnitude: 54.00 MG
Reported by: ASOS

Numerous downed trees were reported throughout the city due to strong winds.  Speed restrictions were enacted on the Betsy Ross, Ben Franklin, and Walt Whitman bridges due to the wind.  High crane operations on the Comcast II tower were suspended because of the strong winds. A wind gust of 62 mph was recorded by the ASOS unit at Northeast Philadelphia Airport at 1513EST on March 2nd.  A wind gust of 59 mph was recorded by the ASOS unit at Philadelphia International Airport at 1024EST on March 2nd.

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 02-MAR-18 13:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Trained Spotter

A wet snow accumulated to a depth of up to 7 inches in the eastern portions of the county where a deformation zone established itself during the storm.  These higher amounts were highly isolated.  7.0 inches of snow was reported in Berwyn, 4.6 inches in Downingtown, 3.3 inches in East Nantmeal, and 2.5 inches in West Chester.  A wind gust of 60 MPH was reported in West Grove at 1505EST on March 2nd.

High Wind in UPPER BUCKS, PENNSYLVANIA
From 02-MAR-18 15:00:00 to 02-MAR-18 15:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Newspaper

Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region.  At one point more than 18,000 customers were without power in Bucks County. A wind gust of 51 MPH was reported by the AWOS  at Perkasie-Pennridge Airport at 1437EST on March 2nd.

Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.

High Wind in EASTERN MONTGOMERY, PENNSYLVANIA
From 02-MAR-18 17:00:00 to 02-MAR-18 17:00:00 (EST-5)
Magnitude: 50.00 EG
Reported by: Broadcast Media

A cold front stalled across the region on March 1st. Meanwhile, a wave of low pressure developed along this front in the Ohio Valley and move eastward, explosively deepening just southeast of Long Island on March 2nd. This large and very deep area of low pressure moved slowly east over the open waters of the North Atlantic Ocean through Sunday March 4th. This led to a variety of weather hazards during this time frame.
Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region.  At one point more than 115,000 customers were without power in Montgomery County. An approximately 45 ft section of tree fell on a vehicle on South Gulph Road between Arden and Upper Gulph Roads in Upper Merion Township killing the 57 year old male occupant. A tree crashed on top of a SEPTA bus around 1300EST on the westbound lanes of I-76 (Schuylkill Expressway) in Lower Merion Township.  Four minor injuries were reported.
Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.
As the rain changed to snow on the 2nd, localized heavy snowfall occurred, particularly over the higher elevations. Southeast of Interstate 95, up to around 3 inches of snowfall was observed. To the northwest of Interstate 95, nearly 6 inches of snow was measured with localized amounts of around 9 inches. Higher elevations mainly to the north of Interstate 80 generally reported greater than 9 inches of snow, with amounts up to 24 inches above 2,000 feet.

Winter Weather in PHILADELPHIA, PENNSYLVANIA
From 02-MAR-18 12:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Emergency Manager

A heavy, wet snow accumulated to a depth of up to 3 inches in the City.  3.0 inches was reported in northeast Philadelphia, 2.5 inches at 6ABC Studios, 2.2 inches in Fox Chase, 2.0 inches at the Franklin Institute, and 1.5 inches at Philadelphia International Airport, which also reported a gust of 59 MPH at 2224EST on March 2nd.  Blowing and drifting snow made travel hazardous Friday afternoon and evening.

High Wind in MONROE, PENNSYLVANIA
From 02-MAR-18 13:30:00 to 02-MAR-18 13:30:00 (EST-5)
Magnitude: 52.00 MG
Reported by: ASOS

A wind gust of 60 mph at 1330EST was reported by the ASOS unit at Pocono Mountains Municipal Airport.  Numerous trees and power outages were reported.  At one point during the event, over 46,000 customers were without power.

High Wind in CARBON, PENNSYLVANIA
From 02-MAR-18 13:30:00 to 02-MAR-18 13:30:00 (EST-5)
Magnitude: 52.00 MG
Reported by: ASOS

A wind gust of 60 mph at 1330EST was reported by the ASOS unit at Pocono Mountains Municipal Airport. Numerous trees and power outages were reported.

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 02-MAR-18 12:00:00 to 02-MAR-18 21:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to 6 inches in the far northern portions of the county where the highest elevations happen to be located.  Higher amounts were also reported in the eastern sections of the county under a deformation zone that established itself over the area during the storm.  5.5 inches of snow was reported near Schwenksville, and 1.5 inches was reported in Tylersport.   A wind gust of 46 MPH was reported at the Limerick Airport near Pottstown at 1712EST on March 2nd.
Blowing and drifting snow made travel hazardous Friday afternoon and evening.

High Wind in NORTHAMPTON, PENNSYLVANIA
From 02-MAR-18 12:00:00 to 02-MAR-18 12:00:00 (EST-5)
Magnitude: 52.00 MG
Reported by: Newspaper

Strong northwest winds with gusts to over 60 MPH occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region. At one point more than 36,000 customers were without power in Northampton County. A wind gust of 60 MPH was reported at Lehigh Valley International Airport at 1720EST on March 2nd. A wind gust of 60 MPH was also reported at Bushkill Center at 1152EST.  Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.

High Wind in LEHIGH, PENNSYLVANIA
From 02-MAR-18 17:00:00 to 02-MAR-18 17:00:00 (EST-5)
Magnitude: 52.00 MG
Reported by: Newspaper

Strong northwest winds with gusts to over 50 MPH occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region. At one point more than 13,000 customers were without power in Lehigh County. A roof was blown off a business in west Allentown. The entrance sign to the Lehigh Valley Zoo in North Whitehall Township was completely destroyed.  A wind gust of 60 MPH was reported at Lehigh Valley International Airport 1720EST on March 2nd. Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.

Winter Weather in LEHIGH, PENNSYLVANIA
From 02-MAR-18 11:00:00 to 02-MAR-18 19:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to one-half foot feet throughout the county.  Representative snowfall reports include 6.0 inches in Fogelsville, 4.1 inches in Salisbury Township, 3.7 inches at Lehigh Valley International Airport, and 0.7 inches near Neffs. Wind gusts up to 60 MPH were common (Lehigh Valley International Airport reported a gust of 60 MPH at 1720EST on March 2nd) causing whiteout conditions during the afternoon and evening commute on March 2nd.

High Wind in EASTERN CHESTER, PENNSYLVANIA
From 02-MAR-18 15:05:00 to 02-MAR-18 15:05:00 (EST-5)
Magnitude: 52.00 MG
Reported by: Mesonet

A gust of 60 mph was recorded by a DEOS (Delaware Environmental Observing System) station in West Grove at 1505EST on March 2nd. Two cars of an East Penn Railroad train were tossed off elevated tracks around midday Friday, March 2nd, near Wilson Mill Road in Lower Oxford Township.  A boxcar and flatbed car were left on their sides along an embankment and the locomotive was pulled partially down the decline. There were no injuries reported.

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 02-MAR-18 11:00:00 to 02-MAR-18 20:00:00 (EST-5)
Reported by: Trained Spotter

A heavy, wet snow accumulated to a depth of up to one-half foot feet in the far northern portions of the county where the highest elevations happen to be located.  6.1 inches of snow was reported near Perkasie, where a wind gust of 51 MPH was also reported at 1437EST.  Many other areas received under 6 inches. Blowing and drifting snow made travel hazardous Friday afternoon and evening.

High Wind in BERKS, PENNSYLVANIA
From 02-MAR-18 15:00:00 to 02-MAR-18 15:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Newspaper

Powerful winds toppled trees and brought down utility lines throughout the county.  A tractor-trailer driver suffered an arm injury when his rig was blown over in Tilden Township around noon, March 2nd, closing the westbound lanes of I-78 near Hamburg for about two hours.  The right lane of northbound Route 61 was closed in Leesport in the area of Shackamaxon Street due to a downed utility pole.  Route 73 was closed near Grims Mill Road in Colebrookdale Township due to downed wires.  Around 1700EST, a roof of a mobile home in the first block of Boyer Lane in Ontelaunee Township was blown off.  At one point during the event, more than 8,500 power outages were reported.

High Wind in DELAWARE, PENNSYLVANIA
From 02-MAR-18 19:30:00 to 02-MAR-18 19:30:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A cold front stalled across the region on March 1st. Meanwhile, a wave of low pressure developed along this front in the Ohio Valley and move eastward, explosively deepening just southeast of Long Island on March 2nd. This large and very deep area of low pressure moved slowly east over the open waters of the North Atlantic Ocean through Sunday March 4th. This led to a variety of weather hazards during this time frame.
Strong northwest winds with gusts to near 60 mph occurred on March 2nd and 3rd. This led to widespread damage to trees and power lines, which in turn induced extensive power outages across the region.  At one point 52,000 customers were without power in Delaware County.  A tree limb fell and struck a pedestrian in Upper Darby near the intersection of Garrett Road and Shadeland Avenue seriously injuring the 28 year old male.
Heavy rainfall occurred over eastern Pennsylvania on March 1st and 2nd, with widespread rainfall amounts of 1 to 2 inches. Areal and minor small stream flooding occurred.
As the rain changed to snow on the 2nd, localized heavy snowfall occurred, particularly over the higher elevations. Southeast of Interstate 95, up to around 3 inches of snowfall was observed. To the northwest of Interstate 95, nearly 6 inches of snow was measured with localized amounts of around 9 inches. Higher elevations mainly to the north of Interstate 80 generally reported greater than 9 inches of snow, with amounts up to 24 inches above 2,000 feet.
The Delaware County Council declared a disaster emergency, citing extensive damage to roads, bridges, homes and businesses as a result of heavy snow, high winds and fallen trees and debris across the county.  As of Saturday morning, March 3rd, 82,000 homes and businesses were still without power, about one-third of the county.