Here is a series taken in Frankling and Grundy Counties.
The first couple of photos are taken of a large storm moving
from west to east, into Hampton Iowa. After driving south to
Ackley, I was looking west at a large supercell with rotation.
Driving just to the south of Ackley, looking west, there are
captures of the wall cloud with rotation. The final picture taken 
south east of Ackley shows large scud cloud before a heavy downpour with quarter size hail.


from Kenny Grimm http://www.iowastorms.com