Low pressure explosively developed in the Gulf of Maine during the afternoon and evening of the 9th...reaching Washington county later that night. The storm produced a nearly record low pressure across portions of the region for the month of April. The low then slowly exited across the Maritimes during the 10th. Snow developed across the region through the afternoon of the 9th. Heavy snow...with rates of 2 to 3 inches per hour at times...occurred through much of the night of the 9th. Lighter snows with the deformation zone then persisted into the 10th before ending late. Warning criteria snow accumulations occurred from the late evening of the 9th into the early morning hours of the 10th. Storm total accumulations across northern and central portions of the region generally ranged from 10 to 18 inches...with local totals up to around 20 inches. Snow accumulations across interior Downeast areas generally ranged from 8 to 15 inches. Rain mixed with the snow along the Downeast coast resulting in generally lighter snow accumulations there.
The storm produced a heavy wet snow which stuck to trees and power lines. Across interior locations...the storm produced wind gusts of 30 to 35 mph creating near blizzard conditions at times. The winds and heavy wet snow combined to bring down numerous trees and power lines leading to major power outages across interior areas. A strong low level jet in advance of the low produced wind gusts up to around 50 mph along the Downeast coast contributing to power outages there even with less snow. Power outages rapidly increased through the overnight hours of the 9th into the morning of the 10th. Power outages across northern and eastern Maine peaked at around 80,000 customers during the morning of the 10th...with the most extensive outages across Penobscot county. This was the most extensive loss of power in several years.  Power restoration was not completed until the 15th...even with help from New Hampshire...Vermont and Canada. Another wind event on the 13th led to additional power outages setting back the recovery process.
The storm occurred during a time of high astronomical tides. The high astronomical tides...strong onshore winds and large waves led to coastal flooding around the time of high tide during the early morning hours of the 10th. Several roads along the Downeast coast were overwashed and flooded...with some roads damaged and left debris covered. Some piers were damaged along with shoreline erosion. Several structures around Machias also took on water.

Coastal Flood in COASTAL HANCOCK, MAINE
From 09-APR-20 22:00:00 to 10-APR-20 01:00:00 (EST-5)
Reported by: Trained Spotter

Explosively developing low pressure crossing the Gulf of Maine produced strong onshore winds and large waves along the Downeast coast. The storm occurred during a time of high astronomical tides. The strong winds...large waves and high tides led to coastal flooding. Seawall Road was overwashed around the time of high tide. Many rocks...up to around a foot in diameter...and debris covered the road once the waters receded. Plows were required to remove the rocks and debris. This was the most significant overwash event of the season at Seawall Road.

Coastal Flood in COASTAL WASHINGTON, MAINE
From 09-APR-20 22:00:00 to 10-APR-20 01:00:00 (EST-5)
Reported by: Emergency Manager

Explosively developing low pressure crossing the Gulf of Maine produced strong onshore winds and large waves along the Downeast coast. The storm occurred during a time of high astronomical tides. The strong winds...large waves and high tides led to coastal flooding. Several roads were overwashed around the time of high tide. In Eastport...Old Toll Bridge Road was flooded around the time of high tide and the Chowderhouse Pier was damaged. Pirate Creek Road was flooded...near Lubec...around the time of high tide. In Machias...several buildings including the town office took on water around the time of high tide.

Winter Storm in SOUTHERN PENOBSCOT, MAINE
From 09-APR-20 13:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 10 to 17 inches.

Winter Storm in INTERIOR HANCOCK, MAINE
From 09-APR-20 13:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 9 to 15 inches.

Winter Storm in CENTRAL WASHINGTON, MAINE
From 09-APR-20 13:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 6 to 12 inches.

Winter Storm in CENTRAL PISCATAQUIS, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 15 to 21 inches.

Winter Storm in CENTRAL PENOBSCOT, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 9 to 15 inches.

Winter Storm in SOUTHERN PISCATAQUIS, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 15 to 21 inches.

Winter Storm in NORTHERN WASHINGTON, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 9 to 12 inches.

Winter Storm in NORTHERN SOMERSET, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Other Federal Agency

Storm total snow accumulations ranged from 9 to 14 inches.

Winter Storm in NORTHERN PISCATAQUIS, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Public

Storm total snow accumulations ranged from 12 to 18 inches.

Winter Storm in NORTHERN PENOBSCOT, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 12 to 18 inches.

Winter Storm in SOUTHEAST AROOSTOOK, MAINE
From 09-APR-20 15:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 10 to 18 inches.

Winter Storm in NORTHWEST AROOSTOOK, MAINE
From 09-APR-20 17:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 7 to 13 inches.

Winter Storm in NORTHEAST AROOSTOOK, MAINE
From 09-APR-20 17:00:00 to 10-APR-20 17:00:00 (EST-5)
Reported by: Trained Spotter

Storm total snow accumulations ranged from 10 to 19 inches.