Here are my thoughts from Novemeber....will update next week. Obviously the SSW didn't work out, but the PV split via tropospheric processes did, so this sped up the timeline on impacts and pushed it earlier to mid Feb.
March 2025 Outlook
March Analogs: 2023x2, 2022, 2021, 2017 2014, 2001,1972
The polar vortex should weaken once again to an extent to close out the season, though confidence is not high in a major episode of blocking. The window for a SSW is through about the 20th of the month, so the impact on winter would largely depend on just how early it can take place. During February or at least the first week of March for maximum impact throughout southern New England. There is another window for a potential KU from approximately March 5 through the 19th, but confidence is low.The cold source should be relatively close by at the very least, not unlike February should major blocking not materialize. Near average to 2F above in the mean with near average precipitation inland and slightly below near the coast.