A strong area of low pressure was situated over the Great Lakes region on Sunday, July 27th. An upper level shortwave, combined with an approaching warm front, allowed for a cluster of strong to severe thunderstorms to break out during the afternoon hours on July 27th over eastern New York, which spread into western Massachusetts during the late afternoon hours. In addition to straight-line wind damage and large hail, the area of thunderstorms also produced an EF1 tornado in Dalton, causing damage to trees and homes. Heavy rainfall from thunderstorms led to flash flooding, especially in the urbanized areas around Pittsfield.
As the strong area of low pressure moved across upstate New York on Monday, July 28th, some additional thunderstorms occurred during the afternoon hours. Trees were downed due to thunderstorms winds across parts of Berkshire County, as the storm's cold front moved through the area. With additional heavy rainfall occurring, flash flooding was renewed in some parts of the Berkshires once again, as two day rainfall totals were in excess of three inches in the Pittsfield area. Cooler and less humid air worked into the area behind the front for Monday night, ending the threat for severe weather and flooding.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:55:00 to 27-JUL-14 17:24:00 (EST-5)
Location: COLTSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several roads in Pittsfield were closed due to flash flooding from thunderstorm heavy rainfall, including Hubbard Avenue.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 28-JUL-14 13:44:00 to 28-JUL-14 17:26:00 (EST-5)
Location: LENOX
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Heavy rainfall from thunderstorms led to flash flooding in Lenox.  Two feet of water was flowing across Housatonic Street.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 28-JUL-14 13:30:00 to 28-JUL-14 13:30:00 (EST-5)
Location: RICHMOND FURNACE
Magnitude: 50.00 EG
Reported by: Amateur Radio

Trees and wires were reported down on Lenox Road in Richmond due to thunderstorm winds.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:55:00 to 27-JUL-14 17:24:00 (EST-5)
Location: COLTSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several roads in Pittsfield were closed due to flash flooding from thunderstorm heavy rainfall, including Dalton Avenue.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 28-JUL-14 13:32:00 to 28-JUL-14 13:32:00 (EST-5)
Location: WEST STOCKBRIDGE
Magnitude: 50.00 EG
Reported by: Amateur Radio

A tree and wires were reported down on Lenox Road in West Stockbridge as a result of thunderstorm winds.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 28-JUL-14 13:33:00 to 28-JUL-14 13:33:00 (EST-5)
Location: WEST STOCKBRIDGE
Magnitude: 50.00 EG
Reported by: Amateur Radio

A tree was downed and on a car in West Stockbridge as a result of thunderstorm winds.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 28-JUL-14 14:00:00 to 28-JUL-14 17:26:00 (EST-5)
Location: HANCOCK
Flood cause: Heavy Rain
Property damage: 277.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rainfall from thunderstorms heavily damaged a 1.5 mile stretch of the Berry Pond Circuit Road in the Pittsfield State Forest in Pittsfield.  As a result of the flash flooding, 13 popular campsites at Berry Pond had to be closed for the remainder of the summer season due to the damaged access road.  A local newspaper reported that when the flash flooding occurred, campers had to be evacuated before water cascading down the mountain gouged out the paved road.   The damage to the road and eleven stone culverts was estimated to be significant and will cost between $173,000 and $277,000 to repair.

Hail in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 17:16:00 to 27-JUL-14 17:16:00 (EST-5)
Location: OTIS
Magnitude: 1.00 
Reported by: Amateur Radio

Quarter size hail was reported during a thunderstorm in Otis.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 15:40:00 to 27-JUL-14 15:40:00 (EST-5)
Location: BERHSHIRG
Magnitude: 50.00 EG
Reported by: Amateur Radio

A tree was downed and on power lines on Mountain Road in Lanesborough due to thunderstorm winds.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 15:50:00 to 27-JUL-14 15:50:00 (EST-5)
Location: NEW LENOX
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were downed on Holmes Road in Pittsfield due to thunderstorm winds.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 17:20:00 to 27-JUL-14 17:20:00 (EST-5)
Location: COLD SPGS
Magnitude: 50.00 EG
Reported by: Amateur Radio

A tree was reported down on Tolland Road in East Otis due to thunderstorm winds.

Tornado in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 15:55:00 to 27-JUL-14 15:56:00 (EST-5)
Location: NORTH ADAMS JCT
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A National Weather Service Storm Survey determined that an EF1 tornado occurred in the Greenridge section of Dalton.  The tornado began in Greenridge park on South Street and moved southeast up a hill for one-quarter of a mile, before lifting behind residences on Lindsay Drive.  The tornado downed a path of trees through a forest, clearing an area that was 10 to 20 yards wide.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 15:55:00 to 27-JUL-14 15:56:00 (EST-5)
Location: NORTH ADAMS JCT
Magnitude: 70.00 EG
Reported by: NWS Storm Survey

A National Weather Service Storm Survey determined that a microburst occurred in the Greenridge section of Dalton.  Most of the direct damage from the microburst was to several hardwood and softwood trees, although one roof was partially lifted up on a house as a result of the wind as well.  Newspaper media reported that at least twenty trees were downed in the area and power lines were downed as well.  Minor damage to homes, mainly due to falling trees, occurred at least six residences.  An EF1 tornado also occurred nearby, but the majority of the damage was attributed to the microburst.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:43:00 to 27-JUL-14 17:24:00 (EST-5)
Location: PITTSFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Over 6 inches of water was flowing across King Street in Pittsfield due to heavy rainfall from thunderstorms.

Flash Flood in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:55:00 to 27-JUL-14 17:24:00 (EST-5)
Location: PITTSFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several roads in Pittsfield were closed due to flash flooding from thunderstorm heavy rainfall, including East Street and Merrill Road.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:01:00 to 27-JUL-14 16:01:00 (EST-5)
Location: HINSDALE
Magnitude: 50.00 EG
Reported by: Public

A tree was downed in Hinsdale due to thunderstorm winds.

Thunderstorm Wind in BERKSHIRE, MASSACHUSETTS
From 27-JUL-14 16:21:00 to 27-JUL-14 16:21:00 (EST-5)
Location: NORTH OTIS
Magnitude: 50.00 EG
Reported by: Amateur Radio

A large tree and wires were downed on Becket Road in Becket due to thunderstorm winds.