A low pressure system moved eastward across east central New York on Wednesday, July 21st. The system's warm front lifted to the north during the morning, ushering in a moist and unstable airmass. A cold front moved across the area during the evening. In addition, a vigorous disturbance in the upper levels of the atmosphere, along with strong winds, led to the development of multiple lines and clusters of strong to severe thunderstorms during the afternoon and evening hours.

Thunderstorm Wind in HERKIMER, NEW YORK
From 21-JUL-10 19:35:00 to 21-JUL-10 19:35:00 (EST-5)
Location: SOUTH COLUMBIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

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

Thunderstorm Wind in HERKIMER, NEW YORK
From 21-JUL-10 19:25:00 to 21-JUL-10 19:25:00 (EST-5)
Location: EATONVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

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

Thunderstorm Wind in FULTON, NEW YORK
From 21-JUL-10 19:30:00 to 21-JUL-10 19:30:00 (EST-5)
Location: OPPENHEIM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported down in Oppenheim due to strong thunderstorm winds.

Thunderstorm Wind in SARATOGA, NEW YORK
From 21-JUL-10 20:09:00 to 21-JUL-10 20:09:00 (EST-5)
Location: HOLBROOK CORNERS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down approximately 5 miles southeast of Galway due to strong thunderstorm winds.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 21-JUL-10 12:54:00 to 21-JUL-10 12:54:00 (EST-5)
Location: RAYMERTOWN
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were reported down on Cooksboro Road in Pittstown due to strong thunderstorm winds. Power outages were also reported.

Thunderstorm Wind in HERKIMER, NEW YORK
From 21-JUL-10 17:13:00 to 21-JUL-10 17:13:00 (EST-5)
Location: MC KEEVER
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported down approximately 5 miles south of McKeever due to strong thunderstorm winds.

Thunderstorm Wind in HAMILTON, NEW YORK
From 21-JUL-10 17:45:00 to 21-JUL-10 17:45:00 (EST-5)
Location: PAGE HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office

A tree was reported down in Speculator due to strong thunderstorm winds.

Thunderstorm Wind in WARREN, NEW YORK
From 21-JUL-10 17:54:00 to 21-JUL-10 17:54:00 (EST-5)
Location: POTTERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported down on Route 9  in Pottersville due to strong thunderstorm winds.

Thunderstorm Wind in HERKIMER, NEW YORK
From 21-JUL-10 19:00:00 to 21-JUL-10 19:00:00 (EST-5)
Location: OHIO
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and wires were reported down in Ohio due to strong thunderstorm winds. Also, a power pole was reported broken along State Route 8.

Thunderstorm Wind in SARATOGA, NEW YORK
From 21-JUL-10 20:17:00 to 21-JUL-10 20:17:00 (EST-5)
Location: BALLSTON SPA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down on East Grove Street in Ballston Spa due to strong thunderstorm winds.

Hail in HERKIMER, NEW YORK
From 21-JUL-10 19:10:00 to 21-JUL-10 19:15:00 (EST-5)
Location: NEWPORT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Half-dollar size hail was reported during a thunderstorm in Newport.

Thunderstorm Wind in DUTCHESS, NEW YORK
From 21-JUL-10 14:06:00 to 21-JUL-10 14:06:00 (EST-5)
Location: NORTHEAST CENTER
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees and wires were reported down in Millerton and Amenia due to strong thunderstorm winds. Some trees were reported down on vehicles in Amenia.

Thunderstorm Wind in ULSTER, NEW YORK
From 21-JUL-10 14:44:00 to 21-JUL-10 14:44:00 (EST-5)
Location: WHITEFIELD
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees were reported down on wires in Accord due to strong thunderstorm winds. Also, a house was struck by lightning.

Thunderstorm Wind in DUTCHESS, NEW YORK
From 21-JUL-10 15:33:00 to 21-JUL-10 15:33:00 (EST-5)
Location: BILLINGS
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

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

Thunderstorm Wind in DUTCHESS, NEW YORK
From 21-JUL-10 15:35:00 to 21-JUL-10 15:35:00 (EST-5)
Location: HAVILAND
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Many trees and wires were reported down in Dover Plains due to strong thunderstorm winds.

Thunderstorm Wind in SARATOGA, NEW YORK
From 21-JUL-10 20:18:00 to 21-JUL-10 20:18:00 (EST-5)
Location: COUNTRY KNOLLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down on Ashdown Road in Ballston Lake due to strong thunderstorm winds.

Thunderstorm Wind in SARATOGA, NEW YORK
From 21-JUL-10 20:18:00 to 21-JUL-10 20:18:00 (EST-5)
Location: BURNT HILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down on Lake Hill Road in Burnt Hills due to strong thunderstorm winds.

Thunderstorm Wind in DUTCHESS, NEW YORK
From 21-JUL-10 15:27:00 to 21-JUL-10 15:27:00 (EST-5)
Location: ROCHDALE
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Public

Trees, large branches and wires were reported down on Sleight-Plass Road near Poughkeepsie due to strong thunderstorm winds.