Pronounced upper-level jet entrance area coupled with a low-level front.
Deep, sloping area of frontogenesis.
Instability mainly located at mid-levels around 700 mb.
Strong low-level Өe advection (40 kt low-level jet).
Strong instability gradient – mid-level (3-6 km) shear 10 to 20 kts.
Warm cloud depth around 4 km.
Precipitable water around 1.9 inches.
Heaviest rain in northern Pennsylvania – no obvious, strong topographic influence.