The BAMD is based on the upper level wind information provided by the GFS. So the northward shift of the 12z BAMD gives us a hint at the GFS's latest prediction for the upper level steering flow. The GFS, HWRF, GFDL, and NOGAPS now predict that the ridge north of Ike will be sufficiently weakened by the shortwave that will move through the eastern US to induce a more northwest to northward turn in a couple days. We'll have to wait and see if the models persist with this scenario, and if the others come aboard. If Ike is severely weakened by a long trip over Cuba, then the future path will still likely be farther west. Let's wait and see...