The amplifying Hudson ridge and associated wave break forces a lot of vorticity southward, developing a strong vortex underneath. This may ultimately act to dampen/force southward the shortwave ejecting eastward for the Feb 5th potential. This is still pretty far out so hard to know details, but the general idea looks similar on the GEFS.
These wave (breaking) interactions help to evolve the HL pattern from an amped central Canada ridge into a developing -NAO.