The cyclone was said to be a "hybrid" storm. The cyclone quickly gained strength in warm waters from the Gulf Stream, and because of cold air over the United States. The system continued to become stronger while moving within the Gulf Stream. The storm developed central atmospheric convection, which is unusual for a storm of its type. Extratropical cyclone. Also, the system developed an eye, which is usually seen in tropical cyclones. Even though the cyclone showed signs of a tropical storm, forecaster Jack Beven stated: "There was no front associated with it [the storm] and it had a warm core, but the radius of maximum winds was more than 150 nautical miles [175 mi, 280 km], so under the standard NHC criteria it didn’t qualify as a tropical storm." On December 23 and 24, the nor'easter intensified to attain a barometric pressure of 970|mb. Another low pressure system that developed behind the storm became stronger, and grew to be larger in size than the original storm. Due to the Fujiwhara effect, the large circulation of the secondary low moved the original nor'easter towards the northwest. The nor'easter passed along the south shore of Long Island, and it made landfall near New York City on December 24. Later, it moved over southeastern New York State. On December 25, which is Christmas Day, the system began to lose strength as it moved towards Nova Scotia, before the pair of low pressure systems moved out to sea early on December 26.