A rapidly developing area of low pressure tracked across the Southern New England coast and directly over Western Maine on the evening of October 30th and into the early morning hours of October 31st.  Light rain fell during the day before moderate rain began overspreading the area by the evening. Periods of heavy rainfall occurred overnight, mainly within a 6 hour window.  Widespread reports of 2 to 4��� of rain were recorded in all areas except the Western Mountains.  Coastal York, Knox and Southern Waldo Counties received 4 to 6��� of rain with a few localized reports of 6.5+��� falling. The heavy rain and excessive runoff led to widespread nuisance flooding, with damage reported in the areas that were hit with the heaviest rainfall amounts.  River response on the preceding day led to minor river flooding, but the bulk of the flooding was due to flash flooding during the overnight hours.  Rivers were elevated during and immediately after the rain ended, but most remained within their banks. Only minor lowland flooding occurred from riverine flooding. Flooding of smaller and faster responding streams and creeks in the hardest hit areas did damage some area roads and bridges.

Flash Flood in YORK, MAINE
From 31-OCT-21 01:00:00 to 31-OCT-21 03:00:00 (EST-5)
Location: SACO
Flood cause: Heavy Rain
Property damage: 2000.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain with up to 6.5 causes excessive run off in the city of Biddeford.  The rapid urban run-off caused erosion on a retaining wall on the Saco River in downtown.  This caused the wall to collapse into the river with extensive damage to the riverfront park area.

Flood in WALDO, MAINE
From 31-OCT-21 06:00:00 to 31-OCT-21 09:00:00 (EST-5)
Location: LINCOLNVILLE
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain with up to 6.5 inches impacted most of Waldo County with widespread flooded reported through the county due to flooded roads causing road damage and culvert blow outs.  Some of the hardest hit towns include Prospect, Swanville, Montville, Lincolnville, Northport and Monroe.

Flood in KNOX, MAINE
From 31-OCT-21 06:00:00 to 31-OCT-21 09:00:00 (EST-5)
Location: (RKD)ROCKLAND ARPT
Flood cause: Heavy Rain
Property damage: 1500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain with reports up to 6.5 inches fell in a short period of time lead to excessive run-off with numerous roads closed and damaged due to flooding in Knox County.  The towns that were hardest hit included Appleton, Camden, Hope, Rockland, Rockport and Thomaston.

Flood in CUMBERLAND, MAINE
From 31-OCT-21 00:59:00 to 31-OCT-21 02:00:00 (EST-5)
Location: PORTLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain of 4 inches in the Portland area caused areas of urban flooding to include flooding at the intersection of Washington and Allen Ave.

Flood in KNOX, MAINE
From 31-OCT-21 06:41:00 to 31-OCT-21 07:41:00 (EST-5)
Location: SOUTH HOPE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain with up to 5 inches being reported led to reports of road flooding on Route 17 in Hope along with several other town roads being closed and impassable.

Flood in KNOX, MAINE
From 31-OCT-21 06:43:00 to 31-OCT-21 08:43:00 (EST-5)
Location: APPLETON
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain with up to 5 inches caused numerous roads to flood in Appleton with  road damage being recorded.

Flood in YORK, MAINE
From 31-OCT-21 01:43:00 to 31-OCT-21 03:43:00 (EST-5)
Location: KINNEY SHRS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rain with up to 6 inches flooded multiple roads in Old Orchard Beach.