Although I live a long long way from the coast, there was one day in February 2007, where I encountered a wintry shower, with a very dark looking cloud overhead. I was at Moretan Morrel College at the time where a group of us were observing the quality of the grass/lawns. I did not really consider looking up at the sky (despite the fact I like to do it alot), because for most of the day the sky was dominated with a few cumulus clouds and perhaps the odd cumulus congestus. So I didn't think anything major would develop. Nevertheless, just as it reached quarter to four, darkness suddenly flooded the whole area, and that was when I noticed a particularly monsterous looking cloud approaching the Campus. I thought to myself, "Uh oh, we're gonna be in for it. That's sure going to come down heavily with hail." I was pretty sure it would have been too dark for snow, even though it was rather chilly outside. But then, it started. There was one hailstone, then two, then three, and after a minute the air was filled with... small hailstones! The kind of hail that was falling, though, was more of the softer, wintry type and it did, in a way, look very much like snow. There was no sign of anything too drastic yet, but some of the group decided to shelter under the nearby building. After a while, the sky seemed to be becoming a little whiter and more blurred. I thought this meant that snow was following, but to my horror, I could see a patch of blue sky to the east heading this way. And so the main part of the shower was beginning to pass. I thought to myself, "That's probably going to be it now." And although throughout the whole thing there had been the odd snowflake falling with the soft hail, I could here a rumble of thunder, just as the patch of blue sky got closer. There had been no lightning (or at least I couldn't see any), and the rumble of thunder was quiet and brief. With much clearer weather to the east, I assumed that the thunder had come from that passing shower. I think it's fair to say that isn't really the best example of Thundersnow, but is still the closest I have ever come to it.