Frontogenesis and lapse rate valid at 18z
Notes:
A cross-section valid at 18z from near New York City to near Lake Ontario of frontogenesis and lapse rates is shown on this page. A southeast to northwest sloping frontal zone can be seen through the entire cross-section, along with a secondary front below the main front, over central New York. The band of heaviest snow at this time was over central New York, and appeared to be at least partly associated with the secondary front.
Slide 7