Now that it's after sunrise I can actually see what happened last night.
From 3 am onwards it alternated between light snow and sleet. Sometimes snow and sometimes sleet. The last heavy burst of sleet came in around or just before 6 am and since 6:15 it's been all snow, but it hasn't ever snowed hard, it's just light to occasionally moderate snow. There are two layers on the ground, there's a translucent layer of sleet at the bottom and a layer of snow on top of that and those two layers cover the streets, the driveways, the grass, and cartops and rooftops. It's less than an inch thick (both layers combined) and the temperature has been at 33F since 4 AM