Ashtabula, United States - December 01, 2024 More than two million residents in New York, Ohio, Michigan and Pennsylvania were under lake effect snow warnings on Sunday morning, according to the National Weather Service (NWS). The weather marks the seasonʃs first lake-effect snowfall. Common in the winter in this region of the US and Canada, lake-effect snow occurs when very cold air moves across the relatively warm water of the lakes. These types of storms can cause large - though fairly localised - amounts of snowfall. As much as 6ft of snow was forecast to fall in some areas by Tuesday morning. Heavy lake-effect snow bands and snow showers have developed downwind of the Great Lakes, and will continue into next week, the NWS said. Travel could be very difficult to impossible in spots. Video Location: United States,Ashtabula X/JustinTjaden