Low pressure off the Southeast U.S. coast on the morning of the 12th intensified rapidly as it moved slowly northeast to just southeast of Cape Cod by the morning of the 13th.  The low continued its slow movement to Nova Scotia by the morning of the 14th.
The storm brought heavy snow to the all of western Maine with the heaviest snow falling from interior York to southern Oxford.  Snowfall amounts ranged from about a foot in the western mountains to more than 24 inches across portions of York County.
In addition, the storm brought several hours of blizzard conditions along the coast during the late morning and early afternoon of the 13th.

Heavy Snow in ANDROSCOGGIN, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in CENTRAL SOMERSET, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in COASTAL YORK, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in INTERIOR CUMBERLAND, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in COASTAL CUMBERLAND, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in COASTAL WALDO, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in INTERIOR WALDO, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in KENNEBEC, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in KNOX, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in LINCOLN, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in NORTHERN FRANKLIN, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in INTERIOR YORK, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in NORTHERN OXFORD, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in SAGADAHOC, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in SOUTHERN FRANKLIN, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in SOUTHERN OXFORD, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Snow in SOUTHERN SOMERSET, MAINE
From 13-MAR-18 05:00:00 to 14-MAR-18 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Blizzard in COASTAL CUMBERLAND, MAINE
From 13-MAR-18 11:24:00 to 13-MAR-18 14:58:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Blizzard in COASTAL YORK, MAINE
From 13-MAR-18 12:00:00 to 13-MAR-18 15:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Blizzard in KNOX, MAINE
From 13-MAR-18 11:30:00 to 13-MAR-18 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Blizzard in SAGADAHOC, MAINE
From 13-MAR-18 11:00:00 to 13-MAR-18 14:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Blizzard in LINCOLN, MAINE
From 13-MAR-18 10:45:00 to 13-MAR-18 14:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations