From AMS Glossary
(Also called northeaster, nor'easter.) A cyclonic storm of the east coast of North America, so called because the winds over the coastal area are from the northeast.
They may occur at any time of year but are most frequent and most violent between September and April. Northeast storms usually develop in lower–middle latitudes (30°–40°N) within 100 miles east or west of the coastline. They progress generally northward to northeastward and typically attain maximum intensity near New England and the Maritime Provinces. They nearly always bring precipitation, winds of gale force, rough seas, and, occasionally, coastal flooding to the affected regions.