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 western Maine 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 INTERIOR YORK, MAINE
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 western Maine early in the morning of the 17th. Within a couple hours snow was moderate to heavy, especially for the interior. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. Closer to the coast mild temperatures resulted in only a brief period of snow. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow. Snow changed over to or mixed with some sleet and freezing rain before ending early in the afternoon. Snowfall totals ranged from 2 or 3 inches near the Maine Turnpike to as much as a foot near the Saco River.

Winter Storm in CENTRAL INTERIOR CUMBERLAND, MAINE
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 western Maine early in the morning of the 17th. Within a couple hours snow was moderate to heavy, especially for the interior. Snowfall rates were near 1 inch per hour for two or three hours leading up to mid morning. Closer to the coast mild temperatures resulted in only a brief period of snow. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow, and especially quick to move into eastern areas. Snow changed over to or mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 2 or 3 inches near I-295 to 9 inches near Sebago Lake.

Winter Storm in INTERIOR CUMBERLAND HIGHLANDS, MAINE
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 western Maine early in the morning of the 17th. Within a couple hours snow was moderate to heavy, especially for the interior. 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, and especially quick to move into eastern areas. Snow changed over to or mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 9 inches near Sebago Lake to 6 inches near Harrison.

Winter Storm in ANDROSCOGGIN, MAINE
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 western Maine early in 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. Closer to the coast mild temperatures resulted in less snow. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow, and especially quick to move into eastern areas. Snow changed over to or mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 5 inches south of the Maine Turnpike to 7 inches near Livermore.

Winter Storm in SOUTHERN FRANKLIN, MAINE
From 17-JAN-22 06:00:00 to 17-JAN-22 16:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the western Maine 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 mid morning. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow, and especially quick to move into eastern areas of central and western Maine. Snow changed over to or mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 5 to 7 inches.

Winter Storm in CENTRAL SOMERSET, MAINE
From 17-JAN-22 07:00:00 to 17-JAN-22 16:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the western Maine 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 mid morning. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow, and especially quick to move into eastern areas of central and western Maine. Snow changed over to or mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 5 to 7 inches, with isolated higher amounts up to 10 inches around Flagstaff Lake.

Winter Storm in NORTHERN FRANKLIN, MAINE
From 17-JAN-22 06:00:00 to 17-JAN-22 16:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the western Maine 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 mid morning. The dry slot and warmer mid level temperatures were only about 6 to 8 hours behind the onset of snow, and especially quick to move into eastern areas of central and western Maine. Snow briefly mixed with some sleet and freezing rain before ending in the afternoon. Snowfall totals ranged from 6 inches near Mount Blue to 9 inches north of Route 16, with isolated higher amounts up to 12 inches around Carrabassett Valley.

Winter Storm in NORTHERN OXFORD, MAINE
From 17-JAN-22 06:00:00 to 17-JAN-22 16:00:00 (EST-5)
Reported by: Trained Spotter

Strong warm air advection forced a laterally translating band of snow into the western Maine 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 OXFORD, MAINE
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 western Maine 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 9 inches.