I thought this was interesting concerning the western ridge. The following is from the NWS Albany discussion:
To add even more uncertainty to the forecast, Stony Brook
Sensitivity analysis developed through CSTAR research suggests that
the eventual track of the storm will also be sensitive to the
strength of the upper ridge that develops downstream of the trough
(as is usually the case with these large east coast storms). A
stronger ridge will be associated with a storm track further to the
west; this is seen in the Euro solution as well. Often, but not
always, models underestimate the strength of the downstream ridge in
the medium-range as they cannot resolve the diabatic ridge-building
due to latent heat release. With ample moisture from the Gulf of
Mexico, it is certainly possible that this trend will manifest
itself with this storm as well.