It is later in the day now but trying to move anywhere west will help, even it means backtracking. Like going via ORD to LHR/Europe.
Today might fare a bit better for NYC and PHL due to what looks like a lot of pre-emptive cancellations, so what is left might actually get out. Weather-wise, BOS might be the worst off this evening. I would avoid BOS in the evening or try to reroute now.