An Arctic Air Mass is a large body of cold air that forms over the polar regions, specifically the Arctic. These air masses are characterized by low temperatures and can bring frigid conditions when they move southward. They typically originate over ice-covered areas, leading to their cold and dry nature. When an Arctic Air Mass moves into a region, it can significantly impact the local weather. It often results in colder temperatures, frost, and even snow, especially in areas that are not accustomed to such conditions. The arrival of an Arctic Air Mass can lead to weather phenomena like cold fronts and blizzards.