New York is experiencing an unseasonably warm fall, but climate experts warn this could be a calm before the storm. With La Niña conditions expected to develop by December, unpredictable cold snaps, heavy snow, and winter storms could sweep across the Northeast. Forecasters are closely monitoring jet stream shifts and ocean temperature transitions, which indicate a 71% chance of La Niña this winter. While mild temperatures dominate New York now, experts caution residents to prepare for potential extreme weather, including freezes and snow events.