No disputing the record, but records there go back only to 1961.
NYC hit the low 70s last month, but in 1950 there were several days in the 60s and one over 70.
Why so warm in 1950?
The actual surge because of storm Sandy as 9 feet, but the high tide added several feet to it.
The storm surge of 1821 was estimated at 13 feet, but it was at low tide (try to imagine a 17-foot surge at lower Manhattan).
Why was there such a powerful storm surge in 1821?