I do not think this is subtropical. It is fully attached to a front and I see no evidence of a warm core, just warm air on eastern side south of a warm front. Also if you watch water vapor loop it is within a broader upper level system centered over WNC. These nor Easter’s can be quite strong and prolonged, as evidenced by winds gusting above 50 on the OBX for the third straight day. The folks jumping on naming this haven’t seen a proper nor Easter in a while! These are fun systems to watch