Deep tropical moisture was drawn north across the region in advance of a slow moving cold front while low pressure lifted north along the front. In addition to the tropical moisture...a strong low level jet provided additional Atlantic moisture. The moisture was focused along the front and low with additional strong upper level support. The result was very heavy rain. Heavy rain developed during the morning of the 30th then persisted through the afternoon. Rainfall totals of 3.00 to 6.00 inches were common across much of the region...with localized totals of 7.00 to 8.00 inches. Lesser rainfall totals of 1.00 to 3.00 inches occurred across northern Aroostook county.
Significant urban and small steam flooding occurred across much of Downeast Maine...with lesser flooding extending north into southern Aroostook county. Numerous roads were flooded and closed across Downeast Maine...with several feet of water covering some roads. Many roads received significant flood damage along with bridges and culverts. Flooding subsided during the evening of the 30th...though many roads remained closed due to damage even after the flood waters receded. The mainstem of the Piscataquis River also briefly crested slightly above flood stage at Dover-Foxcroft.  Gusty winds and saturated soil combined to allow trees to be toppled along portions of the Downeast coast which brought down power lines and contributed to power outages.

Flood in PISCATAQUIS, MAINE
From 30-SEP-15 23:30:00 to 30-SEP-15 23:59:00 (EST-5)
Location: DOVER FOXCROFT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The mainstem of the Piscataquis River began to rise above flood stage during the late evening of the 30th. The flooding was due to 4.00 to 6.00...locally up to around 7.00...inches of rain which had fallen earlier that morning and afternoon. The river briefly crested slightly above flood stage during the early morning hours of October 1st with no significant impacts reported.

Flood in PENOBSCOT, MAINE
From 30-SEP-15 12:00:00 to 30-SEP-15 20:00:00 (EST-5)
Location: DEXTER
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall totals 3.50 to 6.50 inches occurred across Penobscot county during the 30th. The greater rain totals generally occurred across southern and central portions of the county. The heavy rain caused extensive urban and small stream flooding with many roads closed along with damage to bridges and culverts. Numerous roads were flooded and closed around the Bangor area. The Kenduskeag Plaza in downtown Bangor was also flooded when the Kenduskeag Stream overflowed. Additional flooding and road closures were reported in the towns of Dexter and Lincoln.

Flood in HANCOCK, MAINE
From 30-SEP-15 12:00:00 to 30-SEP-15 20:00:00 (EST-5)
Location: DEDHAM
Flood cause: Heavy Rain
Property damage: 159.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall totals of 3.00 to 6.00...locally up to around 8.00...inches occurred during the 30th. This led to extensive urban and small stream flooding. Numerous road closures occurred due to flooding...with 4 to 5 feet of water covering some roads. Extensive damage to bridges and culverts also occurred. Flooding and damage was particularly extensive in the areas around Ellsworth and Bucksport. Additional flooding and flood related damage was reported in the towns of Dedham...Surry...Sullivan...Penobscot and Trenton. A small mudslide occurred along Route 1A near the Ellsworth and Dedham town line. Gusty winds and saturated soil also combined to topple trees on to power lines and some homes in the towns of Trenton and Sullivan. The monetary damage was based on towns which submitted reports. However...significant damage also occurred in other towns which did not report monetary damage.

Flood in WASHINGTON, MAINE
From 30-SEP-15 12:00:00 to 30-SEP-15 20:00:00 (EST-5)
Location: CALAIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall totals of 3.00 to 6.00...locally up to around 7.00...inches occurred across Washington county during the 30th. This led to extensive urban and small stream flooding. Numerous roads were flooded and closed. Damage was also reported to bridges and culverts. Flooding was reported in the towns of Calais...Alexander and Woodland. Gusty winds and saturated soil also combined to topple trees and power lines in the town of Cherryfield.

Flood in PISCATAQUIS, MAINE
From 30-SEP-15 11:00:00 to 30-SEP-15 20:00:00 (EST-5)
Location: KNIGHTS LNDG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall totals of 4.00 to 6.00...locally up to around 7.00...inches occurred across portions of southern Piscataquis county during the 30th which led to urban and small stream flooding. Roads were closed due to flooding in the towns of Brownville...Abbot...Monson...Milo and Parkman.

Flood in AROOSTOOK, MAINE
From 30-SEP-15 13:00:00 to 30-SEP-15 20:00:00 (EST-5)
Location: KNOWLES CORNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Rainfall totals of 3.00 to 6.00...locally up to around 7.00...inches occurred across portions of southern Aroostook county during the 30th. The rain caused urban and small stream flooding which damaged roads in the towns of Smyrna Mills and Merrill. Some roads were closed due to the flooding and flood related damage. Drainage ditches and culverts were also damaged due to flooding. Some homes had water in basements.