nor'easter

A nor'easter is a large-scale, powerful extratropical cyclone that occurs along the East Coast of North America. The term is derived from the strong winds that typically blow from the northeast over the coastal region.

Key Characteristics

• Wind Direction: The defining feature of a nor'easter is that the winds blow from the northeast onto the coast.
• Formation: These storms typically form within 100 miles of the coast, often between Georgia and Massachusetts. They develop when cold, arctic air from Canada collides with the warm, moist air over the Atlantic Ocean (specifically the Gulf Stream).
• Weather Impacts: Despite common association with winter, snow is not a requirement. Depending on the temperature, a nor'easter can bring heavy rain, snow, blizzard conditions, hurricane-force winds, and severe coastal flooding.
• Seasonality: While they can occur at any time, they are most frequent and intense between September and April.

Difference from Hurricanes

While both are cyclonic storms, they have fundamental differences:

• Origin: Hurricanes develop in the warm tropics near the equator, while nor'easters develop in northern latitudes along the East Coast.
• Energy Source: Hurricanes are "warm-core" storms that draw energy from warm tropical waters. Nor'easters are "cold-core" storms that thrive on the temperature contrast between cold air masses and the relatively warmer ocean.