A warm front edging into the southern portions of Southern New England, followed by a cold front moving eastward across the area resulted in severe thunderstorms across much of the area. Many of these produced substantial straight line wind damage and one storm produced a track of intermittent F1 tornado damage that moved through northwestern Connecticut.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:05:00 to 21-JUL-10 15:05:00 (EST-5)
Location: BURLINGTON
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on West Chippens Hill Road was downed by thunderstorm winds.

Hail in HARTFORD, CONNECTICUT
From 21-JUL-10 15:08:00 to 21-JUL-10 15:08:00 (EST-5)
Location: BURLINGTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:26:00 to 21-JUL-10 15:26:00 (EST-5)
Location: SOUTHINGTON
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were downed by straight line winds throughout Southington.  These included trees on West Queen Street and Dunham Road, as well as a tree downed onto a car on Oakland Drive.

Tornado in HARTFORD, CONNECTICUT
From 21-JUL-10 15:15:00 to 21-JUL-10 15:20:00 (EST-5)
Location: BRISTOL
Tornado F-scale: EF1
Property damage: 565.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado touchdown occurred on the east side of Rockwell Park and had an intermittent damage path, mostly at the tree top level, to the end of High Street.  Straight line winds appeared to be the main cause of damage in Bristol, however, damage from a small, brief tornado was also evident.  Trees felled in different directions, tree tops twisted off, and shearing off of tree tops were the nature of tree damage viewed by NWS Storm Survey team members in the area of High and Blakeslee Streets.  This is consistent with low end EF1 tornado damage.  Damage was consistent with a maximum wind speed of about 90 mph.  Numerous trees were downed, bringing down wires and power lines, as well as moving a garage off its foundation, blowing lawn furniture several houses down the street, and crushing an above ground pool.  The Imagine Nation Museum which was very near the damage path recorded a wind gust of 67 mph on their anemometer.

Hail in HARTFORD, CONNECTICUT
From 21-JUL-10 15:31:00 to 21-JUL-10 15:31:00 (EST-5)
Location: NEW BRITAIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in HARTFORD, CONNECTICUT
From 21-JUL-10 15:35:00 to 21-JUL-10 15:35:00 (EST-5)
Location: BERLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:41:00 to 21-JUL-10 15:41:00 (EST-5)
Location: HARTFORD
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wires were downed by thunderstorm winds.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:42:00 to 21-JUL-10 15:42:00 (EST-5)
Location: EAST HARTFORD ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on Governor Street was downed onto wires by thunderstorm winds.

Flood in HARTFORD, CONNECTICUT
From 21-JUL-10 15:45:00 to 21-JUL-10 16:00:00 (EST-5)
Location: NEW BRITAIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Twelve to eighteen inches of water moved over Corbin Avenue.

Thunderstorm Wind in WINDHAM, CONNECTICUT
From 21-JUL-10 15:45:00 to 21-JUL-10 15:45:00 (EST-5)
Location: NORTH GROSVENOR DALE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several trees were downed by thunderstorm winds, including one on Pompeo Road and another on Bully Hill Road.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:20:00 to 21-JUL-10 15:20:00 (EST-5)
Location: FORESTVILLE
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were downed throughout Plainville by straight line winds.  Many of these were downed on Northwest Drive, another onto a car on Cooke Street, and another into a condo unit.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 21-JUL-10 15:37:00 to 21-JUL-10 15:37:00 (EST-5)
Location: NEW BRITAIN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on Stanley Street was downed by thunderstorm winds as well as two eight to ten inch diameter branches that were downed on Kenyon Circle.