GYX is actually participating in an experiment with a new visualization tool, mainly for support services, but I think it's going to have pretty large forecasting impacts too.
The website allows you to play with the so called Grand Ensemble (GEFS, EPS, CMCEPS), including adding or removing members, comparing differences, etc. But you can also view individual cluster groups (pants tent stuff). For instance here, clusters 4 and 5 are the wet ones (12z run) and both feature higher than mean heights across northern Maine and the Maritimes. i.e. you increase the gradient and resulting easterly flow into New England.