Thunderstorm Wind in Union County, Pennsylvania

A severe thunderstorm moved across southern Union County on the afternoon of August 7th, 2023. This thunderstorm caused a swath of straight line wind damage in Union Township just south of State Route 304. Damage began roughly 150 yards south of Route 304 in a wooded area where several trees were snapped or uprooted. The

storm then moved across Amish Rd and destroyed an outbuilding. Several trees were also snapped or uprooted in the vicinity of the outbuilding. Tree damage extended to a wooded area along Felmey Rd as well. The trees were largely laying in the same direction as was debris from the damaged outbuilding, consistent with straight

line wind damage.

High CAPE (>2500 J/kg) and strong speed and directional shear contributed to a significant severe weather episode across south-central Pennsylvania during the afternoon and evening of August 7, 2023. Of note, a significant bow echo produced widespread wind damage and a trio of weak (EF0-EF1) tornadoes across southern York and Lancaster Counties.