Bordereline major to major SN/IP/ZR storms at ATL during 29 weak to low end moderate El Nino winters since 1876-7:
12/29, 12/31-1/1, 1/1, 1/7, 1/8, 1/22, 1/23, 1/23, 1/26, 1/28-9, 2/4-6, 2/7-8, 2/15, 2/23, 2/26, 3/2, 3/2, 3/14 meaning main clumps very late Dec-early Jan, late Jan-early Feb, and late Feb-very early Mar. Middle 1/3's of DJF pretty quiet for whatever reason, which may be randomness.
- 18 storms during 16 winters (two winters had two, each) out of a total of ~29 weak to low end moderate Nino winters since 1876-7. So, ~55% chance per weak to low end moderate Nino winter for borderline major to major SN, IP, and/or ZR at ATL.
- 6 of these 18 during 5 of the 29 winters were a major ZR: 1/7, 1/8, 1/23, 1/28-9, 2/4-6, 2/7-8 (these last two back to back in 1905)
- The other 12 were mainly SN or IP: 12/29, 12/31-1/1, 1/1, 1/22, 1/23, 1/26, 2/15, 2/23, 2/26, 3/2, 3/2, 3/14