From BMX
Have made some tweaks in the forecast grids for Tuesday into
Wednesday, but for the most part these are refinements. Looking
at the latest guidance there is still no doubt that any precip
that falls on Tuesday into Wednesday should be of the snow
variety. Models continue to struggle translating the moisture post
front into snow amounts. Some of this has to do with the strength
and tilt of the upper trough to draw moisture into the system and
some with handling the lower temperatures and their snow ratios.
With the plummeting of temperatures behind this arctic front,
readings will very quickly go below freezing and into the 20s
behind it. Although we do not have high snow amounts in the
forecast grids overall (even in the northwest counties below an
inch at this time) my concern is that any precip that melts before
temperatures go below freezing will quickly refreeze as temps
drops, which could definitely cause possibly big travel impacts
for mainly the northwest half of Central Alabama. Models continue
to show moisture decreasing as we head into Tuesday night as the
post frontal precip moves into the southeast half of Central
Alabama with only flurries now mentioned during the daytime
morning hours in the far southeast now as the upper system exits.
However, with that said, will be keeping a close eye on the
southeast as well. Will be refining more as we head into Monday.
http://forecast.weather.gov/product.php?site=NWS&product=AFD&issuedby=BMX