As I predicted yesterday evening, the 00z ECM caved and moved west.
Cape pointed out yesterday evening that Mt. Holly was using the NBM because of inconsistencies with the globals. The NBM is a blend of more than 40 models that averages out an outlier like yesterdays ECM.
I produce an abbreviated NBM for my newsletter quite often by blending 4 - 7 models. My 4 model blend at 6pm yesterday was .70" for my location. The NWS NBM was at .75". Remember, the ECM was 0. This morning, my 4 model blend is 1.06. The NWS NBM is .76" for me and 1.85" for D.C..
Some models say that a sharp cutoff can occur on the western side. (the Valley)