UPDATE: Since publishing this post, Lufthansa has now cancelled flights to and from Philadelphia on March 14, 2017.
With Blizzard Warnings spreading throughout the Northeast Corridor, airlines are beginning to announce cancellations ahead of the incoming storm.
Lufthansa, SWISS, and Austrian are not immune to mother nature thus they have announced that flights to and from New York / Newark and Boston will be cancelled for Tuesday, March 14, 2017.
Philadelphia and Washington DC are scheduled to operate normally.
As of the time of this post Brussels still showed their flights as being scheduled but that may change sooner than later.
If you were scheduled to fly to or from the NYC or BOS area, please use this link to determine what your options are, including rebooking, refunds, or alternative routings. You can also log in to your Miles & More page to see what options are available to you.