Maybe someone else has experienced this one, but in my 52 years on this planet, I haven't...
I went out on the front porch for a smoke (bad habit, I know) and it was raining lightly. As I was out there, I noticed what appeared to be fog reducing the visibility on the mountains around town. At first it was at the top and then slowly descended as if the cloud deck was lowering. I knew it was snow, and told the wife that probably 200 ft up it was snowing. Within 5 minutes of that statement, the first flakes started mixing in. It went to nearly all snow for a few minutes, but is now back to about a 60/40 rain/snow mix, and the "haze" has moved back up the mountains a bit.
So the atmospheric battle has begun here, but still, I've never seen it play out right before my eyes like that before...