Cool northeast flow was in place across the region but a warm front attempted to move north through Connecticut just as a mid-level short wave trough was approaching. Low pressure from the Midwest moved along the boundary, crossing New England at night. Instability and unseasonably high moisture generated damaging thunderstorms and downpours. A brief tornado also touched down in Mansfield, CT during the early evening.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 16:43:00 to 02-OCT-18 21:00:00 (EST-5)
Location: COTTAGE GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:43 PM EST, a car was reported trapped in flood waters on Lyme Street near the Breakthrough II Magnet School.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 16:50:00 to 02-OCT-18 20:00:00 (EST-5)
Location: HARTFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:50 PM EST, a car was reported trapped in flood waters on Granby Street at Plainfield Street.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 16:58:00 to 02-OCT-18 21:00:00 (EST-5)
Location: NEW BRITAIN
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:58 PM EST, the intersection of Stanley Street and Eddy Glover Blvd was closed due to flooding.  Several cars were trapped in the flooding.  The intersection is adjacent to the campus of Central Connecticut University.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 17:22:00 to 02-OCT-18 21:30:00 (EST-5)
Location: ELMWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:22 PM EST, the intersection of Main Street and Dowd Street in Newington was closed due to flooding.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 17:22:00 to 02-OCT-18 21:30:00 (EST-5)
Location: ELMWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:22 PM EST, the intersection of Vanderbilt Avenue and Dexter Avenue was closed due to flooding.

Flood in HARTFORD, CONNECTICUT
From 02-OCT-18 17:32:00 to 02-OCT-18 21:00:00 (EST-5)
Location: NEWINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:32 PM EST, part of Atwood Street was closed due to flooding.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 02-OCT-18 16:40:00 to 02-OCT-18 16:40:00 (EST-5)
Location: WILSON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:40 PM EST, a tree was down on Weston Street at West Service Road.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 02-OCT-18 16:40:00 to 02-OCT-18 16:40:00 (EST-5)
Location: MANCHESTER
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

At 4:40 PM EST, thunderstorm winds brought down four trees in Manchester.  One was on East Eldridge Street, the others at the intersection of East Maple and Grandview Streets.

Tornado in TOLLAND, CONNECTICUT
From 02-OCT-18 17:12:00 to 02-OCT-18 17:13:00 (EST-5)
Location: MANSFIELD CENTER
Tornado F-scale: EF0
Property damage: 3.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The National Weather Service in Norton confirmed that a weak EF-0 tornado touched down in Mansfield, CT. This was based on a number of sources, including an eyewitness account, information from the Mansfield Emergency Management Agency Director, aerial drone footage provided by the media, and a weak tornado debris signature seen on Doppler radar.
Trees were downed, in a chaotic pattern, starting from just west of Storrs Road (Route 195) between Cemetery Road and Bassetts Bridge Road, continuing east-northeastward across Cemetery Road, and ending just to the east of the southernmost portion of Echo Road. Several shingles were blown off a roof on Storrs Road and were found 500 yards downwind. A person living on Centre Street, just west of Echo Lake observed a swirling mass of leaves and sticks passing to his southeast, some of which were hitting his house. The Mansfield Emergency Management Agency Director walked the path and found that downed trees north of Cemetery Road were facing the southwest while they were mainly facing northeast just to the south of Cemetery Road.