On Fri, 09 Dec 2005 15:08:09 GMT, Don White
wrote:

She says hail only happens in the spring/summer fall.

My recollection is that it takes strong upward convection to form
hail, and that only happens in summer thunderstorms. Apparently as
the moisture droplets are convected upward they pass through zones of
freezing temperatures where they grow in size until they eventually
get heavy enough to fall.