The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or 
(Unfortunately this run has no precip. amounts and the RH and 850 T's are not available to me yet. So, I'll keep this simple and strictly focus on SLP maps for 12Z on SAT 1/29, near the midst of the event (for N GA at least) assuming it gets going FRI night.)
Yesterday's map for 12Z 1/29 (the 96 hr map) had ATL with 1,030 mb (30.42") SLP. Today's is only very slightly higher with 1,031 mb (30.45"). So, it is essentially the same and still indicates a VERY strong and persistent wedge as the parent high is VERY slow to move out (about as slow as I can remember for any cold high).
In the absence of QPF and, therefore, in an effort to try to get some idea of how it may compare with this latest run I'd like to mention two subtle differences vs. yesterday and hope that knowledgeable people will comment on their possible implications as far as QPF is concerned vs. yesterday's run (yesterday's generated ~.65" for Atlanta from late FRI afternoon to early SAT afternoon):
1) There is a bit more of a curving of the 1020 SLP isobar in the N GOM near the boot tip of LA. Yesterday, that isobar was almost a perfect straight line in that area. Today, it is curved in a counterclockwise direction indicating a weak SFC low center (where the little "L" is on today's map). Yesterday's had no "L indicated since it was a straight line there. Comments?
2) Today's has a slightly higher 850 wind speed max in W TN of 17 m/s vs. yesterday's 16 m/s. Notice that yellow area is much larger today vs. the little dot of yesterday. Implications if any?
I don't know how to attach a saved file at this BB. So, I'm not able to post the maps. You can go to the ecmwf.int site and do your own comparisons or else go to a similar thread at some other BB for which I was able to attach them.
