On December 16th low pressure develop near Chesapeake Bay and slowly moved northeastward along the coast to a position near Nantucket late in the day. Eventually low pressure moved into the Gulf of Maine on December 17th and continued towards Nova Scotia. Despite a climatologically favorable track for significant snowfall, the antecedent near surface air mass was marginal for snow south of the mountains. Temperatures aloft were cool and supportive of snow, but rain mixed in south of the foothills. There was a significant upslope and elevation component to snowfall totals when precipitation finally came to an end on the 17th.  Due to the heavy wet snow, significant power outages occurred across parts of New Hampshire with 50,000 outages reported.

Winter Storm in NORTHERN GRAFTON, NEW HAMPSHIRE
From 16-DEC-22 07:00:00 to 17-DEC-22 07:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the White Mountains produced significantly more snowfall along the east facing slopes, while downsloping limited amounts near the Connecticut River. Precipitation tapered off during the morning of the 17th as upslope enhanced snow showers. Snowfall totals ranged from 10 inches near I-93 to as much as 30 inches in the White Mountains.

Winter Storm in SOUTHERN COOS, NEW HAMPSHIRE
From 16-DEC-22 09:00:00 to 17-DEC-22 08:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the White Mountains produced significantly more snowfall along the east facing slopes, while downsloping severely limited amounts near the Connecticut River. Precipitation tapered off during the morning of the 17th as upslope enhanced snow showers. Snowfall totals ranged from 2 inches near the Connecticut River to as much as 30 inches in the White Mountains.

Winter Storm in NORTHERN COOS, NEW HAMPSHIRE
From 16-DEC-22 09:00:00 to 17-DEC-22 08:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Precipitation tapered off during the morning of the 17th as upslope enhanced snow showers. Snowfall totals ranged from 6 to 12 inches.

Winter Storm in NORTHERN CARROLL, NEW HAMPSHIRE
From 16-DEC-22 07:00:00 to 17-DEC-22 03:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the White Mountains produced significantly more snowfall along the east facing slopes. Precipitation tapered off early on the morning of the 17th. Snowfall totals ranged from 12 to as much as 24 inches in the White Mountains.

Winter Storm in SOUTHERN CARROLL, NEW HAMPSHIRE
From 16-DEC-22 07:00:00 to 17-DEC-22 03:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the White Mountains produced significantly more snowfall along the east facing slopes. Precipitation tapered off early on the morning of the 17th. Snowfall totals ranged from 10 near Lake Winnipesaukee to as much as 24 inches in the White Mountains.

Winter Storm in CHESHIRE, NEW HAMPSHIRE
From 16-DEC-22 01:00:00 to 17-DEC-22 00:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began just after midnight on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started during the morning hours and continued into the afternoon. Rain continued to mix in at the lowest elevations. Precipitation tapered off around midnight on the 17th. Snowfall totals ranged from 4 inches around Keene, to as high as 18 inches in the Monadnocks.

Winter Storm in WESTERN AND CENTRAL HILLSBOROUGH, NEW HAMPSHIRE
From 16-DEC-22 02:00:00 to 17-DEC-22 00:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began just after midnight on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started during the morning hours and continued into the afternoon. Rain continued to mix in at the lowest elevations. Precipitation tapered off around midnight on the 17th. Snowfall totals ranged from 3 inches near I-93, to as high as 18 inches in the Monadnocks.

Winter Storm in MERRIMACK, NEW HAMPSHIRE
From 16-DEC-22 04:00:00 to 17-DEC-22 00:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started during the morning hours and continued into the afternoon. Rain continued to mix in at the lowest elevations. Precipitation tapered off around midnight on the 17th. Snowfall totals ranged from 4 inches in the Merrimack River Valley, to as high as 22 inches near Mount Sunapee.

Winter Storm in BELKNAP, NEW HAMPSHIRE
From 16-DEC-22 04:00:00 to 17-DEC-22 00:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started during the morning hours and continued into the afternoon. Some rain continued to mix in at the lowest elevations. Precipitation tapered off around midnight on the 17th. Snowfall totals ranged from 6 to 10 inches.

Winter Storm in SOUTHERN GRAFTON, NEW HAMPSHIRE
From 16-DEC-22 04:00:00 to 17-DEC-22 05:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the White Mountains produced significantly more snowfall along the east facing slopes. Precipitation tapered off early on the morning of the 17th. Snowfall totals ranged from 10 to 20 inches.

Winter Storm in SULLIVAN, NEW HAMPSHIRE
From 16-DEC-22 02:00:00 to 17-DEC-22 00:00:00 (EST-5)
Reported by: Trained Spotter

Light precipitation began early in the morning on the 16th, with snow in the higher elevations and a mix of rain and snow in the valleys. Steady moderate to occasionally heavy snow started relatively quickly after the onset, especially at higher elevations. Southeast flow upsloping into the higher terrain produced significantly more snowfall along the east facing slopes. Precipitation tapered off after midnight on the 17th. Snowfall totals ranged from 12 inches near the Connecticut River to as much as 22 inches in the mountains.