Seeing the Op on the ensembles graph takes me back a few years (07 or 08 maybe?) when the GFS Op went off on one showing cold (beast from the east) run after run after run, yet the rest of the ensembles refused to follow it's lead.
There was even one run from the ECM which supported it, however within T120 or T96, the Op fell in line with the rest of the ensembles. I think it didn't take into consideration a shortwave off Norway.
Anyway my point being is that this is what we could be seeing with the warm Op against the rest, it'll be interesting to see what will be correct.