Quote:
Originally Posted by suburbanite
Cape Cod is pretty unique in that it's one of the only cold weather locales in the U.S. that sits to the east of a sizeable portion of saltwater. The prevailing winds dictate that most of the air will move out over the ocean and not hit land again. Even so, looking at this map you can see that winds moving over Lake Erie travel significantly farther before hitting land than they would at Cape Cod. That distance + higher temperature differential is the difference between a light dusting in Cape Cod and a foot of snow in Buffalo.
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Ocean effect snowfalls on Cape Cod are due to cold maritime winds from the
N and NE that travel long distances over ocean waters and then hit the Cape.
Lake effect snowfall hitting Buffalo and the western/southwestern shores of Lakes Erie and Ontario are derived from dry, frigid continental winds that pick up a lot more moisture from the warm lake waters.
Air mass saturation, temperature differential, wind direction (which distance is a function of), and physical geography (elevation) are the contributing factors to lake effect snowfall amounts, which are highly variable even within a relatively small area.
For Buffalo proper to get dumped on, the wind conditions have to be right... very cold air from the NNW combined with prevailing winds out of the west aim precip emanating from Huron, Georgian Bay, part of Erie, and the western portion of Ontaio all right at Buffalo. Generally, the highest snowfall totals are seen in the higher elevation areas southeast of Buffalo in southern Erie County NY, Chautauqua County NY, and southern and southeastern Erie County PA.
Hence, the higher elevation areas denoted by red average around 100-150 inches of snow annually; with the western plateau of the Adirondacks in dark red averaging around 200 inches