A closed upper low progressed across the northern half of the U.S. with multi-center surface lows pinwheeling around it.  One surface low approached New England on the evening of December 1st. A band of heavy snow moved into extreme southwestern Maine before stalling and weakening early on the 2nd. Snow with occasional mixed precipitation  continued off and on through the 2nd across extreme southwestern Maine with surface low pressure stalled near the 40N/70W benchmark. On the 3rd a strong shortwave trough approached from the northwest and surface low pressure once again deepened and retrograded into the Gulf of Maine. This led to the development of several bands of heavy snow on the 3rd that rotated westward across western Maine through the day. Eventually these weakened and moved east, bringing snow to an end.

Heavy Snow in KNOX, MAINE
From 02-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates in the heavy bands exceeded 1 inch per hour at times. Around midday the dry slot moved into parts of the Midcoast and snow lightened up and mixed with sleet or freezing rain at times. This kept storm total snowfall on the lower side, generally ranging from 4 to 7 inches.

Heavy Snow in COASTAL CUMBERLAND, MAINE
From 02-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

On the evening of December 1st the heavy snow band failed to reach Cumberland County. Relatively little accumulation occurred through December 2nd, with occasional snow showers or mixed precipitation. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 7 to 12 inches.

Heavy Snow in INTERIOR YORK, MAINE
From 01-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

On the evening of December 1st a band of heavy snowfall lifted out of Massachusetts into extreme southwest Maine. The band stalled before getting very far into York County. Snowfall totals overnight were highest south of Route 202. Snow showers an occasional mixed precipitation continued through the day on December 2nd. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 5 to 16 inches.

Heavy Snow in LINCOLN, MAINE
From 02-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with occasional snow showers or mixed precipitation on easterly flow. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 7 to 9 inches.

Heavy Snow in ANDROSCOGGIN, MAINE
From 02-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 6 to 8 inches.

Heavy Snow in KNOX, MAINE
From 02-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates in the heavy bands exceeded 1 inch per hour at times. Around midday the dry slot moved into parts of the Midcoast and snow lightened up and mixed with sleet or freezing rain at times. This kept storm total snowfall on the lower side, generally ranging from 4 to 8 inches.

Heavy Snow in SOUTHERN SOMERSET, MAINE
From 02-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 5 to 9 inches.

Heavy Snow in KENNEBEC, MAINE
From 02-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 5 to 9 inches.

Heavy Snow in INTERIOR WALDO, MAINE
From 02-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

Little snowfall occurred December 1st through December 2nd, with precipitation remaining too far south. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates in the heavy bands exceeded 1 inch per hour at times. Around midday the dry slot moved into parts of the Midcoast and snow lightened up and mixed with sleet or freezing rain at times. This kept storm total snowfall on the lower side, generally ranging from 4 to 7 inches.

Heavy Snow in COASTAL YORK, MAINE
From 01-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

On the evening of December 1st a band of heavy snowfall lifted out of Massachusetts into extreme southwest Maine. Snowfall rates were observed to be in excess of 1 inch per hour in the late evening before snow began to taper. Snow came in waves through the day on December 2nd, adding additional snowfall that was aided by moist easterly flow. Finally as surface low pressure retrograded into the Gulf of Maine one final band of heavy snow developed overhead before weakening. Snowfall totals ranged from 6 to 12 inches by the morning of the 2nd, with storm total snowfall on the afternoon of the 3rd ranging from 12 to 18 inches.

Heavy Snow in SAGADAHOC, MAINE
From 02-DEC-19 19:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

On the evening of December 1st the heavy snow band failed to reach Sagadahoc County. Relatively little accumulation occurred through December 2nd, with occasional snow showers or mixed precipitation. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 7 to 9 inches.

Heavy Snow in INTERIOR CUMBERLAND, MAINE
From 02-DEC-19 20:00:00 to 03-DEC-19 18:00:00 (EST-5)
Reported by: Trained Spotter

On the evening of December 1st the heavy snow band failed to reach Cumberland County. Relatively little accumulation occurred through December 2nd, with occasional snow showers or mixed precipitation. The majority of the accumulation came on the 3rd as surface low pressure retrograded into the Gulf of Maine. Several bands of heavy snow developed and rotated westward over western Maine before weakening. Snowfall rates during the mid morning hours exceeded 1 inch per hour at times. Storm total snowfall generally ranged from 5 to 8 inches.