A rare and historic October Nor'easter brought very heavy snow to portions of southern New England on Saturday October 29.  Low pressure tracked northeast from the North Carolina coast Saturday morning, rapidly strengthening as it passed well south of Nantucket Saturday evening. As the storm intensified, colder air from aloft was drawn into New England resulting in heavy snow in the interior.
Snowfall accumulations of one to two feet were common in the Monadnocks, Berkshires, Connecticut Valley, and higher elevations in central Massachusetts. Up to 31 inches of snow was reported at Jaffrey, New Hampshire and Plainfield, Massachusetts. Minor accumulations were even reported down to the south coast as the rain changed to a period of snow late Saturday night before ending. The accumulation of the heavy wet snow on trees and power lines resulted in widespread tree damage and power outages across many communities in central and western Massachusetts, southern New Hampshire, and northeastern Connecticut.  This resulted in school closures and numerous towns cancelled or rescheduled Halloween and trick-or-treating activities. At the peak, 300,000 customers in New Hampshire were without power.
The precipitation started as mainly snow early Saturday afternoon across the interior of southern New England, although a brief period of rain at the onset was common across the lower elevations. Several hours of heavy snow occurred from mid afternoon through late evening on Saturday October 29. Snowfall rates reached 3 inches per hour for several hours in the Berkshires and Monadnocks as a nearly stationary band of heavy snow set up across this region. The snow tapered off just after midnight Saturday night in western New England with the last of the precipitation exiting eastern New England Sunday morning. This storm also brought damaging winds to Cape Cod and the islands with wind gusts up to 70 mph occurring early Sunday morning October 30 as well as minor to moderate coastal flooding to east coastal Massachusetts during the high tide early Sunday morning.

Heavy Snow in EASTERN HILLSBOROUGH, NEW HAMPSHIRE
From 29-OCT-11 15:00:00 to 30-OCT-11 08:00:00 (EST-5)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nine to twenty-one inches of snow fell across eastern Hillsborough County, with the higher amounts focused to the north.  Heavy wet snow fell on foliated trees, breaking branches and downing trees and wires, resulting in widespread power outages.

Strong Wind in EASTERN HILLSBOROUGH, NEW HAMPSHIRE
From 30-OCT-11 01:20:00 to 30-OCT-11 01:20:00 (EST-5)
Magnitude: 35.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree was downed on Route 3 near exit 2, blocking the right hand lane.

Heavy Snow in WESTERN AND CENTRAL HILLSBOROUGH, NEW HAMPSHIRE
From 29-OCT-11 14:00:00 to 30-OCT-11 09:00:00 (EST-5)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Fourteen to twenty-six inches of snow fell across western and central Hillsborough County.  Heavy wet snow fell on foliated trees, breaking branches and downing trees and wires, resulting in widespread power outages.

Heavy Snow in CHESHIRE, NEW HAMPSHIRE
From 29-OCT-11 14:00:00 to 30-OCT-11 08:00:00 (EST-5)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Eleven to thirty-one inches of snow fell across Cheshire County.   Heavy wet snow fell on foliated trees, breaking branches and downing trees and wires, resulting in widespread power outages.