A cold front crossed the region early on the 19th, providing some fresh cold air despite a relatively mild pattern. High pressure building out of Ontario helped to dam the cold air in place as a warm front approached from the southwest in the evening. Light precipitation moved into the area as a mix of snow, sleet, and freezing rain initially before transitioning to all snow. Primary low pressure near Lake Erie occluded and a secondary low center developed near Nantucket early on the 20th. It was during this time that snowfall was the heaviest. Snow slowly tapered off through the afternoon and evening on the 20th, as an inverted trough remained draped across southwestern Maine during the day.

Winter Storm in INTERIOR YORK, MAINE
From 19-JAN-23 20:00:00 to 20-JAN-23 19:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread southwest Maine during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 6 to 9 inches.

Winter Storm in CENTRAL INTERIOR CUMBERLAND, MAINE
From 19-JAN-23 21:00:00 to 20-JAN-23 18:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread the Maine Lakes Region during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 5 to 8 inches.

Winter Storm in COASTAL CUMBERLAND, MAINE
From 19-JAN-23 21:00:00 to 20-JAN-23 18:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread the Casco Bay area during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 6 to 9 inches.

Winter Storm in COASTAL YORK, MAINE
From 19-JAN-23 20:00:00 to 20-JAN-23 18:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread southwest Maine during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 4 inches along the beaches to 8 inches west of I-95.

Winter Storm in ANDROSCOGGIN, MAINE
From 19-JAN-23 22:00:00 to 20-JAN-23 18:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread the Maine Lakes Region during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 6 to 8 inches.

Winter Storm in SAGADAHOC, MAINE
From 19-JAN-23 22:00:00 to 20-JAN-23 18:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread Midcoast Maine during the evening on the 19th. After midnight snow became moderate to heavy at times. While snowfall rates tapered off by sunrise on the 20th, snow lingered for much of the day as an inverted trough remained draped across southern New Hampshire. Once the upper low moved east of the area snow came to an end during the evening hours on the 20th. Snowfall totals ranged from 5 to 7 inches.

Winter Storm in KENNEBEC, MAINE
From 19-JAN-23 23:00:00 to 20-JAN-23 16:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread the southern Kennebec Valley late in the evening on the 19th. After midnight snow became moderate at times. Snowfall rates tapered off gradually through the as lift became tied more closely with an inverted trough draped over southern New Hampshire. Snow ended during the afternoon on the 20th from north to south. Snowfall totals ranged from 5 to 7 inches.

Winter Storm in LINCOLN, MAINE
From 19-JAN-23 23:00:00 to 20-JAN-23 16:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread Midcoast Maine late in the evening on the 19th. After midnight snow became moderate at times. Snowfall rates tapered off gradually through the as lift became tied more closely with an inverted trough draped over southern New Hampshire. Snow ended during the afternoon on the 20th from north to south. Snowfall totals ranged from 5 to 7 inches.

Winter Storm in KNOX, MAINE
From 20-JAN-23 00:00:00 to 20-JAN-23 15:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread Midcoast Maine late in the evening on the 19th. After midnight snow became moderate at times. Snowfall rates tapered off gradually through the as lift became tied more closely with an inverted trough draped over southern New Hampshire. Snow ended during the afternoon on the 20th from north to south. Snowfall totals ranged from 5 to 7 inches.

Winter Storm in COASTAL WALDO, MAINE
From 20-JAN-23 00:00:00 to 20-JAN-23 15:00:00 (EST-5)
Reported by: Trained Spotter

Snow overspread Midcoast Maine late in the evening on the 19th. After midnight snow became moderate at times. Snowfall rates tapered off gradually through the as lift became tied more closely with an inverted trough draped over southern New Hampshire. Snow ended during the afternoon on the 20th from north to south. Snowfall totals ranged from 5 to 7 inches.