Further to the above, consider these major SN/IP dates at ATL (not ZR):
1/22, 1/23, 1/23, 1/26, 1/28, 1/29-30
And these major SN/IP dates at ATL:
2/10, 2/11-2, 2/11-2, 2/12, 2/12-3, 2./12-5, 2/14-5, 2/15, 2/15-6, 2/17-8
Why have there been zero major SN/IPs in ATL for the ten days 1/31-2/9 (since at least 1879) but there have been 6 of then for the prior ten days and 10 of them the following ten days? Part of the answer may be that there were major ZR's instead but there actually were only three major ZR's during the first week of Feb. So, when combining ZR with the SN/IP, Atlanta had this breakdown:
1/21, 1/22, 1/22-3, 1/23, 1/23, 1/23, 1/23, 1/26, 1/28, 1/28-9, 1/28-30, 1/29-30, 1/30-1 (13 in total)
And then only these in early Feb.: 2/4-6, 2/6-7, 2/7-8 (only 3 in total and 2 of the 3 were in one year)
And then it picks up bigtime again:
2/9-11, 2/10, 2/11-2, 2/11-2, 2/12, 2/12, 2/12-3, 2./12-5, 2/14-5, 2/15, 2/15-6, 2/17-8 (12 in total)
Is there a scientific explanation for why early Feb. has been quieter there than the surrounding periods or is it just a statistical fluke? I think it is more than a statistical fluke.