On the 16th low pressure formed over the Gulf Coast and began to lift northeast. The low continued to track along the East Coast and strengthen until eventually occluding near Chesapeake Bay late in the evening on the 16th. The low continued deepening into central New York where it ultimately got picked up by the next trough and moved northeast. Ahead of the warm front a strong low level jet developed and brought a round of moderate to heavy precipitation to New Hampshire on the 17th. The strongest forcing moved so quickly that mixed precipitation across the interior did not last for a significant amount of time before coming to an end.

Winter Storm in NORTHERN COOS, NEW HAMPSHIRE
From 17-JAN-22 06:00:00 to 17-JAN-22 15:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow north of the White Mountains during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 6 to 8 inches.

Winter Storm in NORTHERN CARROLL, NEW HAMPSHIRE
From 17-JAN-22 06:00:00 to 17-JAN-22 14:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the White Mountains during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 7 to 11 inches.

Winter Storm in SOUTHERN COOS, NEW HAMPSHIRE
From 17-JAN-22 06:00:00 to 17-JAN-22 15:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the White Mountains during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 6 to 8 inches, but lesser amounts occurred near the Connecticut River where downsloping winds warmed and dried out the atmosphere, and as much as 11 inches fell on top of Mount Washington.

Winter Storm in SOUTHERN CARROLL, NEW HAMPSHIRE
From 17-JAN-22 05:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into central New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 7 to 11 inches.

Winter Storm in NORTHERN GRAFTON, NEW HAMPSHIRE
From 17-JAN-22 06:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the White Mountains during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 6 to 8 inches, but lesser amounts occurred near the Connecticut River where downsloping winds warmed and dried out the atmosphere, and over 12 inches fell in the southern White Mountains.

Winter Storm in SOUTHERN GRAFTON, NEW HAMPSHIRE
From 17-JAN-22 04:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into central New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to midday. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 6 to 9 inches, but lesser amounts occurred near the Connecticut River where downsloping winds warmed and dried out the atmosphere.

Winter Storm in BELKNAP, NEW HAMPSHIRE
From 17-JAN-22 05:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into central New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 6 to 9 inches.

Winter Storm in CHESHIRE, NEW HAMPSHIRE
From 17-JAN-22 02:00:00 to 17-JAN-22 12:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into southwestern New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. In addition, upsloping winds enhanced snowfall totals in the higher terrain. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 5 inches near the lower elevations around Keene to as much as 10 inches near Mount Monadnock.

Winter Storm in SULLIVAN, NEW HAMPSHIRE
From 17-JAN-22 04:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into central New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. In addition, upsloping winds enhanced snowfall totals in the higher terrain. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 6 inches near the Connecticut River to as much as 13 inches near Lake Sunapee.

Winter Storm in MERRIMACK, NEW HAMPSHIRE
From 17-JAN-22 05:00:00 to 17-JAN-22 13:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into central New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. In addition, upsloping winds enhanced snowfall totals in the higher terrain. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 6 inches near I-93 to as much as 12 inches near Mount Sunapee.

Winter Storm in WESTERN AND CENTRAL HILLSBOROUGH, NEW HAMPSHIRE
From 17-JAN-22 04:00:00 to 17-JAN-22 12:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into southwestern New Hampshire during the morning of the 17th. Within a couple hours snow was moderate to heavy. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. In addition, upsloping winds enhanced snowfall totals in the higher terrain. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals generally ranged from 5 inches near Route 122 to as much as 11 inches.