This seems to have been a local event (or at least in the Midwest). Funny, because I noticed a halo last night around the moon, but it was much closer to it in proximity. I thought it was odd, but assumed it was the clouds. Apparently, there was more to it. Check out the small write up and pic via the link. I don't buy the reason though. I'm actually tired of the "ice crystals" theory being given for every abnormal event.
December 2, 2009
Channel 5 News