I didn't experience it, but I sure followed it! There was a 1007 mb GOM low, phase 7 MJO, strong +PNA, -EPO, -NAO, and neutral AO. At KATL, 4.6" of 10:1 ratio. SN from Montgomery to NC.You are likely correct. Been a minute
Yes, the setup looks to me like it could produce a long duration SN of 12+ hours.