Just like everything in meteorology, it seems that there’s always one thing that can trump something else, albeit only in very rare cases, and that seems to be happening with that clipper.
I mentioned this a week or two ago, the NAO has not helped us much in the last few years. It either has suppressed systems(yesterdays Virginia snow), and now it’s letting a clipper cut to Ottawa…we can’t seem to win with these NAO blocks.