EF2 tornado in Chester County, Pennsylvania

An embedded supercell in a quasi-linear feature produced a

tornado near Oxford, PA. A path of damage began in crop land near

the intersection of 5th Street and Waterway Road. Tree damage

continued northeast of here.

Significant damage occurred in the Wiltshire Development. On Slate

Hill Drive, one house lost a southeast facing exterior wall.

Another house lost a significant amount of siding and a portion

of the roof. Tree damage continued in a northeast path. At Hickory

Hill Road, there was damage to the roof of a commercial

outbuilding and a recreational trailer was flipped on its side.

Sporadic tree and crop damage was noted from drone footage (this

portion of the path was inaccessible by vehicle) continuing to the

northeast. A metal storage building at a business along Reedville

Road had wall and roof damage. Further northeast there was damage

to turkey pens near the intersection of Baltimore Pike and West

Branch Road. Just a little further northeast, there was also heavy damage to a couple of barns, outbuildings, and porch structures on Conner Rd.

Additional tree and power pole damage continued in a northeast

path. The last damage noted along this continuous path was

exterior wall damage to a farm outbuilding and crop damage along

Street Road near Route 10. Sporadic tree damage was observed near

Route 10 and Ewing Road, but this does not appear to be in a

continuous path from the other damage, so this may have been

caused by straight line winds.

The remnants of Hurricane Ida impacted the mid-Atlantic on September 1, 2021. As it moved northward, Ida began transitioning to a strong mid-latitude cyclone with pronounced frontal features, but with continued tropical moisture. On a regional level, the remnants of Ida became one of the most severe natural disasters in US history, due to a combination of several tornadoes, some of them strong, as well as catastrophic flooding over a large and densely populated area. The severe weather threat unfolded as the system's developing warm front lifted northward from the Delmarva region into Pennsylvania and New Jersey. South of the warm front, partial clearing and moderate to strong instability developed. Meanwhile, very strong shear and forcing, along with tropical moisture, were present within the warm sector. The result was widespread convection in the form of both supercell and quasi-linear thunderstorms. A number of storms became severe across the region, producing several tornadoes and other instances of wind damage. This continued an exceptionally active stretch of high end severe weather in the region, coming barely a month after the tornado outbreak of July 29.