A Winter Weather Advisory is still in effect until 9 AM Tuesday for most of Central Alabama; however, no Tennessee Valley counties are included. Light snow, sleet and freezing rain drift across the middle of the state tonight and early Tuesday bringing light accumulations and some patchy areas of slick roads. Be aware of rapid changes in road conditions near and south of US 278 through the first part of the day.
There is also reason to suspect a dusting of snow in spots on the mountains in Northeast Alabama Tuesday morning; some slick spots may develop there as well because of snow showers moving through the region.
Now, on to Wednesday. This has a "classic" winter storm look to it, and as long as the moisture makes it this far north. Yes, that's still questionable even though some guidance is dumping a ton of snow on us (like this from the NAM):
There is a Winter Storm Watch in effect from noon Wednesday to midnight.
A reasonable expectation is for lesser amounts (probably below 1") to the north and higher amounts (greater than 3") to the south. The bands will shift some as we narrow down the potential, but given what we know tonight, this is the estimate between midday/early afternoon Wednesday and early Thursday morning.
Snow should begin between noon and 3 PM and last through the evening. We'll get more detailed on Tuesday and Tuesday night as everything develops. Models are great, but nothing beats having something real to watch, measure, and track.