Well, once again I got nailed by the storm that hit Dayton (I'm about 50 miles south). This is the third time in as many years that I've lost my antenna. The culprit:
a limb from a big old mulberry tree. It will be easy to repair, just need to find the time to do it. Oddly, the antenna wasn't even in the mulberry tree, but it snagged just enough to bring the antenna down.