CHAT GPT SAYS:
Don’t forget the NAM’s N–W bias. (Yeah, raisin toast surprises and all.)
But sometimes that “bias” is signal, not noise. In tight baroclinic setups, the NAM can resolve sharper frontal slopes and focused forcing that globals smooth out.
Dec 2005 is the template: globals too far SE, NAM closer to the true frontal position. Jet interaction over a steep boundary led to rapid deepening and unexpected wind intensity.
Same idea here. Globals look SE of the best QG forcing. If the initial low forms closer to Delmarva and tucks under stronger 500 mb diffluence, even a 50-mile west shift changes everything — track, capture, even stall potential — all NW of current global positions.