Nor'easters tend to slow down as they come into eastern Quebec or New Brunswick, which means Jay Peak often benefits from several more hours of snowfall than its neighbours downstream. ...
The well-established Vermont myth that lake effect snows never occur is false. Lake Champlain and other bodies of water were not frozen in December so the cold air that came over the warm waters increased evaporation and the amount of moisture in the atmosphere, which resulted in amplified snow amounts. During a normal winter, Jay's close proximity to Lake Champlain, the St. Lawrence River, Lake Ontario, and several other rivers and lakes in Quebec contributes at least 20% of the mountain's annual snowfall. The heaviest, most persistent lake effect snows occur during warmer than normal winters, when the lakes are not frozen and occasional bursts of cold air come over the warm waters. Case in point, on March 24th, 2001 Jay Peak was pounded with some 2 feet of snow in less than 12 hours, while resorts just 30-50 miles away saw considerably less accumulation. ...
Jay seems to receive more snow from orographic uplift than any of its neighbours in New England. This can be explained in two ways: firstly, since Jay is further north the air tends to be colder and secondly, while the Adirondacks and Catskills can sometimes "rob" incoming moisture from progressing into the Green and White Mountains, the mountains to the west and north of Jay are much smaller and therefore, less efficient moisture thieves.