The NWS Huntsville has issued a winter storm watch beginning late tonight (at 3 a.m. Thursday morning) for counties in the Tennessee Valley of North Alabama and at 6 a.m. Thursday for their Northeast Alabama Counties.
No word from the NWS Birmingham on what their intentions are, but here is the latest thinking from the morning run of the GFS.
LATE NOTE 1:41: Look for the NWS to issue some sort of winter weather advisory or watch when they issue their afternoon forecast package in a couple of hours. They are currently evaluating all of the morning data.
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The new GFS snow output continues with the thought of an accumulating snow for parts of North and Central Alabama as a strong upper level low moves across.
It indicates he best chance for accumulating snows will be northeast of Birmingham, but a dusting to 1/2 inch could affect areas from Birmingham to the Southwest, in keeping with James’ earlier graphic. It indicates areas from northeast of Birmingham could see 1-2 inches of snow by tomorrow evening. Here is the graphic for snow depth at 6 p.m. tomorrow evening. Some light accumulations over West Central Alabama would have already melted by then.
The snow should mainly accumulate on grassy areas, but locations that see 1 to 2 inches of snow could see it stick on roads as well.
And as we always warn, upper level lows bring their own surprises with them, generally in the form of a few quick, heavy snow accumulations, so keep that in mind.
James will have a complete update around 3 p.m. with the Weather Xtreme Video.