What is the most likely two-letter air mass symbol for an air mass from Canada that produces lake-effect snow in New York State?

The most likely two-letter air mass symbol for an air mass from Canada that produces lake-effect snow in New York State is "mP," which stands for maritime Polar. This air mass originates over the cold waters of the Pacific or Atlantic Oceans and brings cool, moist air that can lead to significant snowfall when it interacts with the warmer waters of the Great Lakes.