Is hail very common in your area? It is normally nearly non-existant here, but this spring we had numerous hail storms.
http://en.wikipedia.org/wiki/List_of_costly_or_deadly_hailstorms
In addition to the three on the list (plus the one that just happened):
"Thirteen additional hailstorms between 1981 and 1998 caused an estimated $600 million in damage in the Calgary area alone."

Grobe: Sorry to hear that you had a big hail storm in the southern part of the province. Up north here we have had 2 hail storms in the last couple of week but they were minor and we were very lucky to have no serious damage.