Storms that move northward along the eastern shore of north America during winter may produce heavy snowfalls by combining cold arctic air with warm, moist air coming in from the ocean. These storms are known as nor Easters.
Nor Easters are formed in North America when a cold air front and warm air front coincide with each other over the ocean forming a low-pressure system.
In this low-pressure area, clouds are produced that are gradually developed into a storm-like condition leading to nor Easters storms that move along the eastern shore in a northward direction during the cold weather season.
For example, a cold front originates from Canada and slides over the Atlantic ocean off to the eastward shore of the United States resulting in nor Easter storms.
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