The combination of a moist airmass and a wave of low pressure tracking north along a cold front just to the east of Long Island resulted in scattered showers and thunderstorms across Southeast Connecticut.  The redevelopment of these showers and storms over the same area led to a period of persistent heavy rain over New London County, which resulted in flash flooding.  The township of Norwich was hit the hardest with WSR-88D Dual-Pol Storm Total Accumulation estimates of 5 to 8 inches, verified by observations received on the ground.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 15:31:00 to 25-JUL-13 16:01:00 (EST-5)
Location: MOHEGAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Golden Rd. near Rt. 32 in Norwich was closed due to flooding.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 13:45:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

West Town St. at I-395 in Norwichtown was impassable due to flooding.  In addition, a vehicle was stranded in flood waters at the intersection of While Plains Rd. and Hansen Rd. also in Norwich.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 13:57:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An office complex at 12 Case St. in Norwich was evacuated due to flooding.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 13:28:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A vehicle was stranded in flood waters on Huntington Ave in Norwich.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 14:21:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

In Norwich, the Yantic River exceeded bankfull at the intersection of Sturtevant St. and Pleasant St., downstream of the river gauge, resulting in flooding. The public reported a storm total rainfall of 7.88 inches.  Mesonets from the neighboring towns of Yantic, Oakdale and Montville reported total rainfall amounts of 5.25 inches, 3.17 inches and 1.96 inches respectively. Additionally, between 1200 and 1215 EST, the mesonet in Yantic reported 1.15 inches of rainfall in 15 minutes.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 14:30:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Sholes Ave., Pleasant St., and West Town St. in Norwich were closed due to flooding.  Residents in the area also experienced basement flooding.  Several motor vehicles were stranded in flood waters as well and occupants were rescued by the local fire department.

Flash Flood in NEW LONDON, CONNECTICUT
From 25-JUL-13 14:40:00 to 25-JUL-13 16:01:00 (EST-5)
Location: NORTHWICHTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The exit ramp of I-395 at exit 82, West Town St. was closed due to flooding in Norwich.