Banana high is a term used when a high (or pair of highs) bends around an area of low pressure and blocks it. It happened with Hurricane Florence and set it on a path to the Carolinas instead of OTS.
The GFS has a track record (pun intended) for showing that BS about pile driving into HPs, it isn't going to happen, so the low will track further south as has been shown with both the GEFS (the GFS ensembles) and the EPS (Euro ensembles). That major suppression is why even my area is going to get at least SL/FL (Sleet or Flurries), I hope this helps.