A lake effect snow warning is a bulletin issued by the National Weather Service in the United States to warn of heavy snowfall accumulations that are imminent from convective snow generated by very cold airmass passing over unfrozen lakes (lake effect snow).

Lake effect snow is common across the Great Lakes region during the late fall and winter. Lake Effect snow occurs when cold air, often originating from Canada, moves across the open waters of the Great Lakes.

Dec 31, 2024 · The NWS says "heavy" lake-effect snow is projected to bring up to 20 inches of snow in areas of upstate New York by Thursday. Additional bands of the lake-effect snow could bring the...

Nov 29, 2024 · As cold air passes over the relatively warm water of the Great Lakes, significant lake-effect snow bands are expected to blanket several communities -- from Cleveland, Ohio, to Buffalo, New York -- with snowfall. Snow forecast through Monday.

Jan 14, 2025 · Portions of New York and Pennsylvania are under a lake-effect snow warning on Tuesday as "heavy" accumulations up to a foot may be possible in certain areas, the National Weather Service...

What is Lake Effect Snow? Lake Effect Snow (LES) is very common across the Great Lakes region during the late fall and winter. LES occurs when cold air, often originating from Canada, moves across the open waters of the Great Lakes.

Dec 2, 2024 · Lake effect snow is slamming the Great Lakes, with seven states from Wisconsin to New York under snow alerts on Monday. So far, snow totals have reached 65 inches in Barnes Corners, New York; 30 inches in Erie, Pennsylvania; 56 inches in Saybrook, Ohio; and 42 inches in Gaylord, Michigan.

Nov 28, 2024 · Lake effect snow is a weather phenomenon that occurs when cold, dry air moves over a large, warmer body of water, such as the Great Lakes. This temperature difference causes the air to...