switch to velocity image This radar shows two distinct supercell
thunderstorms. The one that produced the porch damage is the
northern one, located in northeastern Brown County. This storm
exhibits a kidney-bean shape, which sometimes characterizes
high-precipitation supercells (the most common type of supercell
in the Ohio Valley). The most notable feature to a storm of this
shape is the reflectivity notch on it eastern side. This notch
is indicative of a rotating updraft. Click the link below the
radar image for a look at the rotation in this storm.