Here is another one..
An active pattern for December continued, with this fourth event of
the season coming quickly on the heels on the third, which ended
just the previous day. This event evolved as complex hybrid event,
in which snow accumulations off of Lake Erie were driven more by
pure lake effect, while the snow accumulations off of Lake Ontario
more a combination of synoptic, upslope and lake effect snow.
A mid-level wave moved across the region late Monday night into
Tuesday morning producing a widespread light snowfall. During the
day Tuesday, the mid-level wave deepened into a closed off low while
a surface low deepened across northern New England and southeast
Quebec. The deepening system to our east allowed for ample wrap
around moisture to move back into our region Tuesday night along and
behind a secondary cold front.
The synoptic snow became lake enhanced by Tuesday afternoon as 850mb
temperatures plummeted to around -16C by Tuesday night into
Wednesday morning on the backside of the departing low pressure
system. By Tuesday night into Wednesday morning, the event
transitioned into mainly into lingering lake effect east and
southeast of both lakes