I haven't ever flown UA internationally out of EWR. Me and the SO have a LHR flight booked for late Tuesday night. If this turns into a large storm with ~9in of accumulation, what are the odds our flight gets severely affected? Forecast is showing the snow will stop by Monday afternoon. This is our honeymoon, and we have a bunch of subsequent flights on separate itineraries, so I want to make sure this first flight doesn't derail the rest of the trip.