EF1 tornado in Bucks County, Pennsylvania

A tornado embedded within a squall line developed several miles

southeast of the storm which produced a tornado in Buckingham

Township. Tornadic damage was first observed in the vicinity of

Stoneybrook Rd at Eagle Rd, near Jericho Creek. The tornado

tracked northeastward from there. It passed over the Jericho

National Golf Club, and sporadic tree damage mainly consisting of

uproots and large limbs snapped was observed in a path throughout

the golf course. It then moved over the adjacent Brownsburg Park,

where additional tree damage was observed and several soccer goals

were observed flipped in various directions. The tornado then

began to approach the Delaware River. Some minor tree damage was

observed along River Rd. However, the tornado appeared to lift

just slightly before reaching the Delaware River, with no apparent

damage on Pebbletown Rd just prior to the river. Throughout its

path, the tree damage produced by this tornado was fairly

sporadic, and it may have been discontinuous. Noticeable wind

damage was also observed for at least a mile east of the tornado

track, especially near its endpoint close to the Delaware River.

This is believed to be straight line wind damage, which is

corroborated by radar data, occurring around the rear flank

downdraft region of the tornadic circulation. However, the exact

length and width of the tornadic circulation is somewhat uncertain

due to the surrounding areas of straight line wind damage.

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.