Summary...heavy snow over the northwest slopes of the Catskill mountains was associated with...
A closed low at 500 mb trapped and slightly retrograding beneath a strong upper ridge over Greenland.
Surface low pressure over the Gulf of Maine.
Warm advection from the northeast across a frontal zone over central New York.
Strong low-level frontogenesis associated with the frontal zone.
Reduced lapse rates and a favorable temperature profile for dendritic crystal growth over the frontal zone.
Slide 11
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