Hail in Jackson County, Illinois

A photo showing hail estimated up to golf ball size was reported from near Dowell.

Multiple rounds of severe thunderstorms impacted the Quad State region on the 27th. The first round of storms arrived during the early morning hours of the 27th, associated with a warm front lifting northeastward across the region. Being elevated storms, large hail was the primary impact. Additional isolated to scattered storms developed during the midday hours, also tracking northeastward with large hail.

In Southern Illinois, early morning MLCAPE values were around 750-1000J/kg, DCAPE was 700-900J/kg, effective bulk shear was a very robust 50-60kts, and mid-level lapse rates were around 6.5C/km.

Southern Illinois received primarily hail with early to mid morning thunderstorms, with the largest reports to golf ball size in Vergennes and Dowell. The one wind damage report involved portions of trees falling at a home in Anna, damaging a porch.