The following events were reported: Thunderstorm Wind. These occurred near station USW00013739, approximately 29.0236 km away, between 2020-06-03 10:55:00 and 2020-06-03 18:32:00.The events resulted in 0 injuries and 4 fatalities. No significant property or crop damage was reported. Episode Narrative: An area of thunderstorms, some of them severe, moved from northwest to southeast across southeastern Pennsylvania during the mid-morning hours on Wednesday, June 3rd. Then a derecho, which developed just southeast of Lake Erie during the early morning hours, moved rapidly southeast across Pennsylvania before exiting off the New Jersey coast by early afternoon (130 PM). Damaging winds associated with this derecho were sporadic over western and central Pennsylvania, but as the thunderstorm complex moved into increasingly unstable air in the eastern part of the state just before noon, wind damage reports became more numerous and widespread. Most of these reports were confined within a 50-mile wide swath extending from Berks County eastward to the Philadelphia metro area, then further east to the Ocean County shoreline in New Jersey. Wind gust reports between 60 and 70 MPH were common within this swath, with some of the highest gusts as follows:  83 MPH at Reading Regional Airport (Berks County), 76 MPH in Pottstown (Montgomery County), 75 MPH in Malvern (Chester County), and 71 MPH in the Holmesburg section of Philadelphia. In addition to these destructive wind gusts, frequent to continuous cloud to ground lightning, heavy rain, and a few instances of hail were also reported throughout the area. ||Tragically, four deaths were reported in eastern Pennsylvania as a result of these severe wind gusts. Three fatalities in Montgomery County were due directly to falling trees. The fourth fatality in Delaware County was due to a house fire caused by an electrical malfunction from a fallen tree. This is the highest number of fatalities from a derecho event in Pennsylvania since 1950. ||Over 208,000 power outages were reported in southeastern Pennsylvania as a result |of fallen trees on power lines. Some localities were without power for several days. Numerous road closures were also reported due to fallen trees.|A seven story 150 unit apartment building took severe roof damage in Lansdale Borough, Montgomery County. The Montgomery County Community Based COVID-19 Testing Site shut down at noon due to the storms. Personnel took shelter and reported minor property damage.||Because this derecho moved off the coast by 130 PM, the warm afternoon sun was able to sufficiently destabilize the atmosphere for the formation of another round of severe thunderstorms over some of the same areas that experience them earlier in the day. Reported wind gusts associated with these thunderstorms generally ranged between 45 and 65 MPH, with a 65 MPH wind gust measured at the Philadelphia International Airport. The remaining thunderstorms then moved offshore by 1000 PM, which brought an end to the day's severe weather. An area of thunderstorms, some of them severe, moved from northwest to southeast across southeastern Pennsylvania during the mid-morning hours on Wednesday, June 3rd. Event Narrative: Several large trees down near the intersection of Horseshoe Trail Road and Haverhill Road in Chester Springs. Downed tree blocking Hillcrest Avenue near Forrest Avenue in Kimberton. Time estimated from radar. Downed wires on a vehicle on Coldstream Road in Kimberton. Downed wires on Conestoga Road near Lancaster Avenue in Malvern. Downed tree and traffic light on Moores Avenue and Kelmar Avenue in Malvern. Downed tree and wires on Monument Avenue in Malvern. Tree down on Lloyd Avenue in Malvern. Downed tree on Kings Highway near Bailey Road near Downington. Several reports of power lines down in the Newton Square area. Downed tree on Country Club Road near Beacon Hill Lane near Valley Forge. Tree into a house on Hilltop Road in Paoli. Multiple downed trees and limbs near Wayne. Bordentown NOS gauge. Downed wire on Paoli Pike near Rustic Lane in Malvern. Tree into a house on Mill Road in Glen Mills. Widespread reports of power lines down in Brookhaven and Springfield. Downed trees on Leopard Road near Edgewood Avenue in Paoli. Downed tree blocking Old Eagle School Road near Wayne. Downed tree blocking Grubb Road near Treble Lane in Paoli. Several reports of trees and wires down in the Folcroft area. Downed tree and wires on Laurel Road in Darby. Downed trees and wires in the Darby area. Downed tree and wires near Alfred Avenue in Darby. A tree crased through the roof of a building at the Philmont Country Club in Lower Moreland Township killing one employee. A tree fell on the roof of a car killing one person near the intersection of Belmont Avenue and Rock Hill Road. A tree fell on the roof of a car killing one person in Lower Merion along Medford Road. Section of a roof blown off at the Park Circle Apartments near the Rhawnhurst section of Philadelphia. Multiple tree branches covering the streest. Large branches between one and two inches thick. Estimated time based on radar. Downed tree on Pughtown Road near Pughtown. Multiple large trees snapped in Spring City. Numerous trees down in Spring City. Report via social media with photos. Downed limbs and power lines near Vincent. Downed tree in wires near Vernfield. Several reports of trees and power lines down in the Collegeville area. Downed tree in wires near Hatfield. Multiple trees snapped near Skippack. Large tree down on a building at the Knollwood Apartments in Phoenixville. Photo shows considerable structural damage. Large tree down in the 400 block of South Park Avenue in Trooper. Several trees down near Mainland. Numerous reports of power lines down in Valley Forge. Portion of a roof blown off an apartment building in Fortuna. Several large trees downed in Valley Forge National Historic Park. Multiple structures were damaged by the fallen trees. Trees and power lines down in numerous places across central Bucks County, including Chalfont. Multiple large tree branches down and two trees snapped on golf course near Colonial Village. Numerous reports of trees and power lines down in Warrington. Multiple trees down near the intersection of Spring Road and North Warren Avenue. Large tree down on Wall Street in Spring City. Downed tree in wires near Exit 18 of Interstate 476 in Conshohocken. Numerous reports of trees and power lines down in Norristown. Tree down on Conestoga Road near Chester Springs. Tree down on Saint Matthews Road near Birchrunville. Video via social media of transformers blowing during thunderstorm winds near Bridgeport. Tree and wires down on West Main Street in Trooper. Several reports of trees and power lines down in the Warminster area. Several photos of uprooted trees in King of Prussia provided via social media. Several trees uprooted in Plymouth Valley. Multiple trees down near Delaware Valley University with the largest diameter around 1 foot. Trees and power poles down in Newton Square. Downed tree on interstate 476 near the I-76 Interchange in West Conshohocken. Downed tree in wires on Pennsylvania Avenue near Bridge Street in Oreland. Downed tree in wires on Stenton Avenue near Hillcrest Avenue in Philadelphia. Numerous reports of power lines down throughout the Cheney area. Time estimated from  radar. Tree down along side road in Oakmont. Large trees down damaging fencing and other property at multiple residences in Davisville. Several trees and power poles down in Springfield. Numerous reports of power lines down across the Aston area. Downed power lines throughout the Franklin Square area. Several downed trees in the Bensalem area. Multiple trees and power poles down on Bellevue Avenue. County Emergency Management also reports widespread damage in Bensalem. Several trees uprooted near Churchville Park. Trees and large limbs down in the Holland area. Several large tree limbs snapped off with some falling onto cars on Whitby Avenue approaching Cobbs Creek Parkway in southwest Philadelphia. Trees down in the Belmont section of Philadelphia. Time estimated from radary. Several downed trees in Northeast Philadelphia near the Bucks County line. Large trees down in neighbors yard near Fort Washington PA. Several large tree limbs snapped off near Bensalem, destroying a fence. A tree fell on a power line that fell on a house near Wallingford, which then started a house fire, killing one individual.