I see at least one airline, an ultra low cost, is braving the storm.
'Spirit Airlines' has an A320 scheduled flight, NK103, from Boston to Fort Lauderdale at 38,000 ft SE of Baltimore. (10:17 UK time) (
Plane Finder ? Flight Radar and Live Flight Tracking)
Seems to have flown right down the East coast. And they apparently charge for the coffee on board.