Uncertainty 1 is wave spacing and if the storm phases with the next incoming shortwave. #2 is that while the NAO is negative, it's more of a thumb ridge than a true block. It can give way enough to allow a track well west of 40/70 if this really amps. It's tricky for I-95. 9/10 pic.twitter.com/hklOJHeq9c

— Jim Sullivan (@JimSullivan92) January 11, 2022