The following events were reported: Flash Flood, Tornado. These occurred near station USW00013739, approximately 29.0967 km away, between 2020-08-04 06:35:00 and 2020-08-04 13:30:00.The events resulted in 18 injuries and 1 fatalities. The events caused property damage valued at 4000.0 and crop damage of 0.0. Episode Narrative: Tropical Storm Isaias brought high winds, heavy rain, several tornadoes, and coastal flooding to the mid-Atlantic region, becoming the most impactful tropical cyclone to impact most of the region since Sandy in 2012. Flash flooding as a result of heavy rain caused two direct deaths from this event...one in Lehigh County and the other in Montgomery County. Tropical Storm Isaias brought high winds, heavy rain, several tornadoes, and coastal flooding to the mid-Atlantic region, becoming the most impactful tropical cyclone to impact most of the region since Sandy in 2012. Event Narrative: Moderate flooding occurred along Valley Creek in the Valley Forge area. Minor flooding occurred along French Creek in Phoenixville. Several roads in Exton were closed due to flooding, including sections of Business US Route 30 and PA Route 100. Blueball Avenue was closed near West 10th Street in Marcus Hook due to flooding. Birmingham Road was closed near Riflery Drive in East Bradford Township due to flooding. Concord Road was closed near Interstate 95 in Chester Township due to flooding. US Route 1 was closed near Valleybrook Road in Chester Heights due to flooding. US Route 30 was closed near the Lancaster Avenue interchange in East Caln Township due to flooding. South University Avenue was closed at South 38th Street in Philadelphia due to flooding. North Ship Road was closed at Newcomen Road in Uwchlan Township due to flooding. PA Route 23 was closed at PA Route 100 in South Coventry Township due to flooding. PA Route 320 was closed at Old Marple Road in Marple Township due to flooding. Interstate 76 was closed at the US Route 202 interchange in King of Prussia due to flooding. Sections of US 202 were also closed due to flooding. Haverford Road was closed at Karakung Drive in Ardmore due to flooding. PA Route 363 was closed at Audubon Road in Audubon due to flooding. Major flooding occurred along the Wissahickon Creek in the Fort Washington area. Major flooding occurred on the East Branch of the Brandywine Creek, downstream from Downingtown. Major flooding occurred along the White Clay Creek in the Strickersville area. Minor flooding occurred along the Pennypack Creek in Philadelphia. Minor flooding occurred along the Little Neshaminy Creek in the Hartsville area. Moderate flooding occurred along the Neshaminy Creek in the Penns Park and Rushland area. After crossing into Philadelphia County, the tornado continued moving northwest through the Philadelphia Mills Mall and then to Knights Road and Medford Road toward Dunks Ferry Road. Three exhaust |systems and 6 RTU systems were blown off the roof in less than 15 |seconds at the former Walmart Store currently undergoing |reconstruction, and numerous trees, some close to 100 years old, |were snapped or blown over along Knights Road, Medford Road, and |Dunks Ferry Road. Roofs, siding, and awnings were blown off many |homes in the area. A few cars were also tossed or turned over as |the storm moved through. The estimated wind speed in this area was|100 mph, equivalent to EF1 on the Enhanced Fujita scale. The tornado may have briefly lifted as it continued northwestward and prepared to cross into Bucks County for a second time. A tornado touched down just east of the Philadelphia Mills Mall as it moved in a northwesterly direction. The initial touchdown occurred in Bucks County, very near the Philadelphia County border. Uprooted trees were found near the area of Kings Ave and Paradise Ave. The tornado then quickly approached the county line at Pocquessing Creek. Multiple water rescues in Norristown. Multiple water rescues in Upper Merion Township. Widespread roadway flooding in Radnor Township. Darby Creek Road was closed near Lawrence Road in Haverford Township due to flooding. Minor flooding occurred along the Red Clay Creek in the Kennett Square area. Major flooding occurred along Cobbs Creek in Philadelphia. Major flooding occurred along the Wissahickon Creek in Philadelphia. Major flooding occurred on the East Branch of the Perkiomen Creek near Schwenksville. Major flooding occurred along the Perkiomen Creek in the Graterford area. Moderate flooding occurred along Crum Creek near Newtown Square. Moderate flooding occurred along the Frankford Creek in Philadelphia. Major flooding occurred along Ridley Creek near Media. Major flooding occurred along Chester Creek in the Chester area. An EF0 tornado occurred in Worcester Township in Montgomery |County, Pennsylvania as Tropical Storm Isaias moved northward |along the East Coast of the United States. With southeastern |Pennsylvania being in the northeastward, right front quadrant, the|tornado and parent storm moved in an unusual northwestward |trajectory ahead of the main center of the tropical storm. An area|of circulation tightened in a strong cell within a rainband in |southeastern Montgomery County. As this circulation tightened, a |brief tornado formed near the intersection of Brindle Court and |Township Line Road in Worcester Township, where a few small trees |were downed in a small residential subdivision. From here, the |tornado continued its northwestward trajectory through the |township, downing trees along Potshop Road. The circulation may |have lifted with the path being somewhat discontinuous. A somewhat|denser area of trees were downed as the tornado moved across |Valley Forge Road and northwestward along Heebner Road. Several |tree tops were sheared off in addition to several utility poles |being pushed over along Heebner Road near the intersection of |Shefley Lane. The tornado continued northwest from here, |eventually downing several hardwood trees along Hollow Road. One |tree brought down several utility lines as it fell. From here, the|tornado lifted with only a few other trees being downed a little |ways from Hollow Road in a small wooded area. After crossing back into Bucks County, the tornado, which may have lifted for a time, caused additional damage in the Southampton area of Bucks County. Numerous trees were snapped |in this area as well, with many homes and cars damaged due to |falling trees and tree limbs. The Sycamore Drive and Harding Roads|areas were hardest hit. The estimated wind speed in this area was|90 mph, equivalent to an EF1 on the Enhanced Fujita scale.| |Current evidence again suggests the tornado lifted one more time |as the parent circulation traveled to the Doylestown area, where |it touched down one final time near the Central Bucks West High |School. Here bleachers on the visitor���s side of the athletic |field were picked up and tossed before the vortex moved on to the |Doylestown Hospital complex where at least six automobiles were |tossed some distance, and where substantial damage occurred to the|Children���s Village Day Care center with no serious injuries |reported. Numerous trees were felled in and around the hospital |center, and several metal lamp posts were bent from the wind. The |estimated wind speed in this area was 115 mph, equivalent to a |low-end EF2 on the Enhanced Fujita scale. The tornado then |continued moving in a northwesterly direction, snapping and |falling trees, as well as causing damage to homes and other |properties, especially along and near Sandy Ridge Road, Jefferson |Avenue, and Lower State Road, before lifting along Ferry Road near|the Peace Valley Reservoir. The estimated wind speed in this area|was 100 mph, equivalent to an EF1 on the Enhanced Fujita scale. A 5-year-old girl with autism was swept away by flood waters running through a tributary of Towamencin Creek after wandering away from her nearby family home. Rescuers found the victim's body adjacent to the creek in Fischer's Park after a 22-hour search. Several water rescues took place in Skippack Township. South Bryn Mawr Avenue was closed near Mill Road in Radnor Township due to flooding.