A strong, complex, dual area of low pressure from the Great Lakes to the New Jersey coast on the morning of December 21st eventually lifted north across New York into Quebec by December 22nd.
On the front end of the storm, a wintry mix of snow and some sleet accumulated 1 to 3 inches across Vermont with up to 6 inches in the southern Green Mountains. More importantly, a strong low-level jet stream of 85 to 100+ mph moved across Vermont during the morning and early afternoon. A predominate southeast flow created damaging down slope winds across the western slopes of the Green mountains. Much of the damage was to trees and power lines, but there was some light structure damage to buildings and a few tractor trailers were blown over. One such accident in Salisbury resulted in one fatality. An estimated 25,000 to 30,000 customers were without power.
On the backside (December 22nd), the combination of wraparound moisture from the departing storm and strong, moist upslope flow produced widespread 2 to 5 inches across much of central and northern Vermont. In the climatological favored western slope communities of the Green Mountains, 6 to 12 inches of snow occurred.

High Wind in EASTERN CHITTENDEN, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 63.00 MG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several reports of tree branches, trees and wires down as well as siding and roof shingle damage along the western slope communities in eastern Chittenden county. Communities affected included Bolton, Underhill, Jericho, Nashville, Richmond, Jonesville and Huntington. A NWS employee measured 73 mph at his residence in Nashville.

High Wind in LAMOILLE, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 61.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several reports of tree branches, trees and wires down as well as siding and roof shingle damage along the western slope communities in eastern Lamoille county. Communities affected included Cambridge and Jeffersonville. A measured wind gust of 70 mph was recorded in Cambridge. A measured wind gusts of 125 mph was recorded at the summit of Mount Mansfield (4400 feet).

Winter Storm in EASTERN ADDISON, VERMONT
From 22-DEC-12 15:00:00 to 23-DEC-12 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall accumulations of 4 to 8 inches were common in eastern Addison county.

High Wind in WESTERN RUTLAND, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several reports of tree branches, trees and wires down as well as siding and roof shingle damage along the western slope communities in eastern and western Rutland counties. A tree fell on a mobile home in Castleton. Some of the most impacted communities included Pawlet, Rutland, Clarendon, Wallingford and Danby.

High Wind in EASTERN RUTLAND, VERMONT
From 21-DEC-12 09:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several reports of tree branches, trees and wires down as well as siding and roof shingle damage along the western slope communities in eastern and western Rutland counties. A tree fell on a mobile home in Castleton. Some of the most impacted communities included Pawlet, Rutland, Clarendon, Wallingford and Danby.

Winter Storm in EASTERN CHITTENDEN, VERMONT
From 22-DEC-12 15:00:00 to 23-DEC-12 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall accumulations of 5 to 10 inches were common in eastern Chittenden county.

Strong Wind in WESTERN ADDISON, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong wind gusts of 50 to 55 mph along Route 7 through Salisbury, Middlebury, Vergennes downed several tree branches, a few trees and power lines. These strong winds caused a tractor-trailer to be blown over that caused a fatal accident to the other vehicle's driver in Salisbury.

Winter Storm in EASTERN FRANKLIN, VERMONT
From 22-DEC-12 15:00:00 to 23-DEC-12 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall accumulations of 8 to 12 inches were common in eastern Franklin county.

Strong Wind in WESTERN CHITTENDEN, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong wind gusts of 50 to 55 mph pushed west from the western slopes of Vermont's Green mountains into the immediate suburbs with Burlington. There were numerous tree branches, a few trees, power lines and some roof shingles damaged in communities like Essex, Essex Junction, South Burlington, Williston and Colchester.

Winter Storm in LAMOILLE, VERMONT
From 22-DEC-12 15:00:00 to 23-DEC-12 10:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall accumulations of 5 to 10 inches were common in Lamoille county.

High Wind in EASTERN ADDISON, VERMONT
From 21-DEC-12 10:00:00 to 21-DEC-12 14:00:00 (EST-5)
Magnitude: 53.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Mesonet

Several reports of tree branches, trees and wires down as well as siding and roof shingle damage along the western slope communities in eastern Addison county. Communities affected included Jerusalem, Ripton, Bristol, East Middlebury and Bread Loaf.