The Susquehanna Valley wind-funnel
Harrisburg sits in a river valley that channels weather systems and intensifies gusts as they come through. Wind damage here is not an unusual event — it is a recurring seasonal condition. Gusts lift the leading edge of a shingle, break the seal strip and crease the tab, then lay it back down looking untouched.
Shows up as: broken seals, lifted rake edges, missing ridge cap





