You honestly going to sit here on a weather board and tell me that NY isnt in the Mid-Atlantic?
https://www.merriam-webster.com/dictionary/mid-Atlantic
https://www.dictionary.com/browse/mid-atlantic-states
https://www.vocabulary.com/dictionary/mid-Atlantic
https://en.oxforddictionaries.com/definition/mid-atlantic
https://www.oxfordlearnersdictionaries.com/us/definition/english/the-mid-atlantic-states
https://www.roughguides.com/destinations/north-america/usa/mid-atlantic/new-york-state/long-island/
https://www.longisland.com/long-island.html
Long Island Geography
To the north of the island is Long Island Sound, which separates it from the coast of Connecticut and Rhode Island. To the south are the Great South Bay, South Oyster Bay, and Jamaica Bay, which are actually lagoons, protected from the Atlantic Ocean by a string of narrow barrier islands, most notably Fire Island. The island separates into two forks at the eastern end, known as the North Fork and South Fork.
Long Island is interesting because it is geographically part of the Mid-Atlantic, however many towns and hamlets along the island's north shore and in eastern Suffolk County, such as Oyster Bay, Port Jefferson and Sag Harbor seem to resemble New England towns, while many of the towns and hamlets along the south shore, such as Long Beach, Valley Stream, and Babylon seem to resemble Mid-Atlantic coastal communities, especially those on the shore between New Jersey and Virginia.
Long Island can be considered the geographical border between the Mid-Atlantic and New England.