A cold front located over the Great Lakes approached the region from the west late Monday, July 9th. A prefrontal trough well ahead of this front, in conjunction with a lake breeze boundary, and a hot, humid and unstable air mass in place, led to the rapid development of scattered strong to locally severe thunderstorms across portions of eastern New York State and western New England during the late afternoon and early evening hours of Monday.
In addition, some thunderstorms contained locally intense rainfall rates of 2 or more inches per hour.  This led to localized flash flooding in urbanized areas.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 09-JUL-07 16:16:00 to 09-JUL-07 16:16:00 (EST-5)
Location: EASTMOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were reported down due to strong thunderstorm winds in North Greenbush.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 09-JUL-07 16:22:00 to 09-JUL-07 16:22:00 (EST-5)
Location: SCHODACK CENTER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees and approximately 6 wires were reported down due to strong thunderstorm winds in and near Schodack Center.

Thunderstorm Wind in WASHINGTON, NEW YORK
From 09-JUL-07 20:20:00 to 09-JUL-07 20:20:00 (EST-5)
Location: CLEMONS
Magnitude: 50.00 EG
Reported by: Park/Forest Service

Multiple trees were reported down in Clemons due to strong thunderstorm winds.

Thunderstorm Wind in MONTGOMERY, NEW YORK
From 09-JUL-07 18:55:00 to 09-JUL-07 18:55:00 (EST-5)
Location: FT PLAIN
Magnitude: 50.00 EG
Reported by: Law Enforcement

Trees were reported down due to strong thunderstorm winds in Mindenville.

Thunderstorm Wind in MONTGOMERY, NEW YORK
From 09-JUL-07 16:30:00 to 09-JUL-07 16:30:00 (EST-5)
Location: CANAJOHARIE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and wires were reported down due to strong thunderstorm winds in Canajoharie.

Hail in ALBANY, NEW YORK
From 09-JUL-07 17:07:00 to 09-JUL-07 17:07:00 (EST-5)
Location: LATHAM
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter to half dollar size hail was reported in and near Latham.

Lightning in ALBANY, NEW YORK
From 09-JUL-07 18:30:00 to 09-JUL-07 18:30:00 (EST-5)
Location: ALBANY
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Newspaper

A house fire on Cuyler Avenue in Albany was initiated by a lightning strike, which is believed to have hit an electrical panel on the outside of the house. Once hit, an electrical surge and subsequent fire spread from the basement through the rest of the house. The house sustained severe damage, and partially collapsed.
Two firefighters suffered minor injuries while trying to extinguish the blaze.

Thunderstorm Wind in ALBANY, NEW YORK
From 09-JUL-07 18:00:00 to 09-JUL-07 18:00:00 (EST-5)
Location: DELMAR
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees and wires were reported down due to strong thunderstorm winds in the Delmar and Elsmere areas.

Hail in HERKIMER, NEW YORK
From 09-JUL-07 18:08:00 to 09-JUL-07 18:08:00 (EST-5)
Location: ILION
Magnitude: 1.00 
Reported by: Broadcast Media

Quarter size hail was reported in Ilion.

Hail in HERKIMER, NEW YORK
From 09-JUL-07 18:32:00 to 09-JUL-07 18:32:00 (EST-5)
Location: HERKIMER
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel size hail was reported in Herkimer.

Thunderstorm Wind in HERKIMER, NEW YORK
From 09-JUL-07 18:32:00 to 09-JUL-07 18:32:00 (EST-5)
Location: CEDARVILLE
Magnitude: 50.00 EG
Reported by: Trained Spotter

A tree was reported down on wires in Cedarville due to strong thunderstorm winds.

Thunderstorm Wind in ALBANY, NEW YORK
From 09-JUL-07 16:15:00 to 09-JUL-07 16:15:00 (EST-5)
Location: GUILDERLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Numerous tree limbs, some large, were reported down in and near Guilderland due to strong thunderstorm winds.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 09-JUL-07 16:40:00 to 09-JUL-07 16:40:00 (EST-5)
Location: SCHENECTADY
Magnitude: 50.00 EG
Reported by: Law Enforcement

Several trees were reported down due to strong thunderstorm winds in Schenectady.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 09-JUL-07 17:15:00 to 09-JUL-07 17:15:00 (EST-5)
Location: EASTMOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down in North Greenbush and Sand Lake due to strong thunderstorm winds.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 09-JUL-07 17:20:00 to 09-JUL-07 17:20:00 (EST-5)
Location: ROTTERDAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down in Rotterdam due to strong thunderstorm winds.

Thunderstorm Wind in ALBANY, NEW YORK
From 09-JUL-07 17:55:00 to 09-JUL-07 17:55:00 (EST-5)
Location: COLONIE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees were reported down in Colonie due to strong thunderstorm winds.

Flash Flood in SCHENECTADY, NEW YORK
From 09-JUL-07 18:15:00 to 09-JUL-07 20:00:00 (EST-5)
Location: SCHENECTADY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain from repeated clusters of thunderstorms led to flash flooding in portions of Schenectady. This flooding led to several cars being stranded within rapid rises of water, along with ensuing water rescues.
Weaver Street in Schenectady was particularly hard hit.

Hail in SCHENECTADY, NEW YORK
From 09-JUL-07 17:35:00 to 09-JUL-07 17:35:00 (EST-5)
Location: SCHENECTADY
Magnitude: 0.88 
Reported by: Trained Spotter

Penny to nickel size hail was reported in the Woodlawn area of Schenectady.

Hail in SCHENECTADY, NEW YORK
From 09-JUL-07 17:29:00 to 09-JUL-07 17:29:00 (EST-5)
Location: NISKAYUNA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail was reported in Niskayuna.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 09-JUL-07 17:35:00 to 09-JUL-07 17:35:00 (EST-5)
Location: SCHENECTADY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were reported down in the backyard of a trained spotter in the Woodlawn area of Schenectady. In addition, the top of a cabana in the yard was ripped off.

Thunderstorm Wind in COLUMBIA, NEW YORK
From 09-JUL-07 19:00:00 to 09-JUL-07 19:00:00 (EST-5)
Location: NEW LEBANON
Magnitude: 50.00 EG
Reported by: Law Enforcement

Wires were reported down due to strong thunderstorm winds in New Lebanon.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 09-JUL-07 18:36:00 to 09-JUL-07 18:36:00 (EST-5)
Location: SCHODACK CENTER
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees were reported down in Schodack Center due to strong thunderstorm winds.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 09-JUL-07 16:20:00 to 09-JUL-07 16:20:00 (EST-5)
Location: POESTENKILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and wires were reported down across central Rensselaer county due to strong thunderstorm winds, particularly near Poestenkill.

Lightning in ALBANY, NEW YORK
From 09-JUL-07 18:30:00 to 09-JUL-07 18:30:00 (EST-5)
Location: ALBANY
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

The Park Playhouse at Albany's Washington Park sustained significant damage from a lightning strike, which occurred around 18:30 EST. Estimated damages were around $10,000.

Flash Flood in ALBANY, NEW YORK
From 09-JUL-07 18:45:00 to 09-JUL-07 20:00:00 (EST-5)
Location: ALBANY
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain from repeated clusters of thunderstorms produced localized flash flooding in the city of Albany, and in portions of Colonie, Guilderland, and Delmar. Rapid rises in water led to several stranded vehicles and water rescues, along with subsequent road closures.
Some of the roads that were closed included Sand Creek Road in Colonie between Everett and Osborne Roads, Lincoln Avenue and North Allen Street in Albany, Colonial Avenue near Western Avenue in Albany, Kenwood Avenue in Delmar, and Western Avenue near Stuyvesant Plaza in Albany.

Hail in ALBANY, NEW YORK
From 09-JUL-07 17:00:00 to 09-JUL-07 17:00:00 (EST-5)
Location: LOUDONVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail was reported in Loudonville, and covered the ground.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 09-JUL-07 17:50:00 to 09-JUL-07 17:50:00 (EST-5)
Location: SCHENECTADY
Magnitude: 50.00 EG
Reported by: Trained Spotter

Numerous trees and wires were reported down in the Mount Pleasant neighborhood of Schenectady. One large tree reportedly landed on a house.