The storm brought snowfall rates of up to two inches per hour to part of the eastern United States, according to the NWS, with the intensity expected to ease at around 8 am on Friday.
A bomb cyclone is the term used to describe a rapidly strengthening weather system, sometimes brought about by the collision of cold and hot air masses.
Multiple winter weather advisories were issued for several states, including New York, New Jersey, Virginia, and Maryland.
Michael Gaffney says he recorded this footage showing the progression of snow in Lindenhurst, Long Island, early on Friday morning. Credit: Michael Gaffney via Storyful