Tea kettle bands of lake effect snow developed offshore over Lake Erie and Lake Ontario for an extended period of time prior to moving onshore, first on Lake Erie and eventually on Lake Ontario.  An arctic front then moved south across the region on the evening of the 30th, with winds becoming northwest for the second half of this event.
Off Lake Erie, the tea kettle lake effect snow moved onshore from Ripley all the way to South Buffalo.  The heavy snow did not last long in the Buffalo Metro area, dropping a few inches during the late afternoon.  A band of heavy lake effect snow locked in for a much longer period of time along the Chautauqua County shoreline and extending into southwest Erie County and the Boston Hills.  Snowfall rates reached two to three inches per hour at times. The lake effect snow weakened some overnight on the 29th through the 30th on westerly winds, with several bands of moderate snow meandering across the western Southern Tier and far southern Erie County.  The lake effect snow came to an end by early evening on the 30th.  Specific snowfall reports included: 22 inches at Eden; 18 inches at Perrysburg and Forestville; 15 inches at Colden; 12 inches at Boston, Springville, Portland, Fredonia and Silver Creek; 9 inches at Glenwood and Hamburg; and 8 inches at Dunkirk.
Off Lake Ontario, the tea kettle lake effect snow moved onshore across  western Jefferson County on the afternoon of the 30th.  The band continued to intensify during the late afternoon, and moved onshore again from Sodus Bay to Fair Haven and southwest Oswego County producing snowfall rates of around three inches per hour.  By early evening, the entire band moved onshore as an arctic front crossed the lake. In the wake of this front, northwest winds resulted in multiple bands of lake effect snow south and southeast of Lake Ontario from late evening on the 30th through the morning of the 31st from Niagara to Oswego counties.  The lake effect snow diminished to flurries and light snow showers by midday on the 31st.  Specific snowfall reports included: 13 inches at Sterling and Minetto; 12 inches at Hilton; 11 inches at Wolcott and Fulton; 10 inches at Brockport, Sodus and Oswego; 9 inches at Fulton; and 8 inches at Greece and Walworth.

Lake-Effect Snow in CHAUTAUQUA, NEW YORK
From 29-DEC-17 14:00:00 to 30-DEC-17 21:00:00 (EST-5)
Property damage: 35.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Lake-Effect Snow in CATTARAUGUS, NEW YORK
From 29-DEC-17 14:00:00 to 30-DEC-17 21:00:00 (EST-5)
Property damage: 35.00K
Crop damage: 0.00K
Reported by: COOP Observer

Lake-Effect Snow in SOUTHERN ERIE, NEW YORK
From 29-DEC-17 14:00:00 to 30-DEC-17 21:00:00 (EST-5)
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Social Media

Lake-Effect Snow in MONROE, NEW YORK
From 29-DEC-17 15:00:00 to 31-DEC-17 08:00:00 (EST-5)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Social Media

Lake-Effect Snow in WAYNE, NEW YORK
From 29-DEC-17 15:00:00 to 31-DEC-17 08:00:00 (EST-5)
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Lake-Effect Snow in NORTHERN CAYUGA, NEW YORK
From 29-DEC-17 15:00:00 to 31-DEC-17 08:00:00 (EST-5)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Social Media

Lake-Effect Snow in OSWEGO, NEW YORK
From 29-DEC-17 15:00:00 to 31-DEC-17 08:00:00 (EST-5)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Social Media