Completely hypothetical... But if some location ever did receive 4 feet of snow in 36 hours, how high could a drift get? Real question for the pros though, how well can our weather models forecast an event on the leading edge of an arctic blast like what is shown? What do analogs show? The last one last year also was forecasting a decent snow at longer lead times (there were still blizzard warnings), but we mostly got an inch of dust with strong winds.