Eric Snitil on Twitter: "Large #hail like we saw in Alabama yesterday takes an incredible amount energy. The graphic below shows how fast a storm's updraft must rise to support various hail
PHOTOS: Storms drop softball-sized hail in Texas, severe weather risk continues - The Weather Network
The Complete Guide to Softballs
Softball-size hail falls near Appleton as storms pound Wisconsin
What Are the Three Sizes of Balls That Are Used in Softball? - SportsRec
How large is 'golf ball-sized' hail, and other hail measurements