Nor ` easter s can occur at any time of the year but are mostly known for their presence in the winter season . Nor ` easter s can be devastating and damaging , especially in the winter months , when most damage and deaths are cold related , as Nor ` easter s are known for bringing extremely cold air down from the Arctic air mass. . Nor ` easter s form along the East Coast of the United States , usually in the months between October and April , although nor ` easter s can form any time of the year .