A warm and moist southerly flow of air moved into the region in advance of a powerful cold front. The combination of partial sunshine, increasing amounts of instability and strong wind dynamics with this system placed the region into a rare Moderate Risk by the Storm Prediction Center. Several supercell thunderstorms developed earlier in the day in advance of the main squall line associated with the cold front with the potential for tornadoes, although none developed across the region. The main hazard was straight line damaging wind gusts from a squall line during the afternoon and early evening hours that resulted in numerous power outages and trees down across the area. The squall line moved east of the area later in the evening, ending the threat for severe weather.
As a result of the storms, newspaper media reported that 13,000 Central Hudson Power customers were without power due to thunderstorm wind damage in Dutchess and Ulster counties.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 08-SEP-12 15:05:00 to 08-SEP-12 15:05:00 (EST-5)
Location: SCOTIA
Magnitude: 50.00 EG
Reported by: Law Enforcement

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

Thunderstorm Wind in GREENE, NEW YORK
From 08-SEP-12 15:21:00 to 08-SEP-12 15:21:00 (EST-5)
Location: WINDHAM
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds in Windham.

Thunderstorm Wind in GREENE, NEW YORK
From 08-SEP-12 15:30:00 to 08-SEP-12 15:30:00 (EST-5)
Location: GREENVILLE RNBOW ARP
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds in Greenville.

Thunderstorm Wind in COLUMBIA, NEW YORK
From 08-SEP-12 16:04:00 to 08-SEP-12 16:04:00 (EST-5)
Location: STUYVESANT FALLS
Magnitude: 50.00 EG
Reported by: Trained Spotter

Numerous branches were reported down due to thunderstorm winds in Stuyvesant Falls.

Thunderstorm Wind in ULSTER, NEW YORK
From 08-SEP-12 16:00:00 to 08-SEP-12 16:00:00 (EST-5)
Location: ESOPUS
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds in Esopus.

Thunderstorm Wind in ULSTER, NEW YORK
From 08-SEP-12 15:58:00 to 08-SEP-12 15:58:00 (EST-5)
Location: GALEVILLE
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds in Galeville.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 08-SEP-12 15:54:00 to 08-SEP-12 15:54:00 (EST-5)
Location: NASSAU
Magnitude: 50.00 EG
Reported by: Law Enforcement

Multiple trees and wires were reported down due to thunderstorm winds in Nassau.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 08-SEP-12 15:32:00 to 08-SEP-12 15:32:00 (EST-5)
Location: PLEASANTDALE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Multiple trees and wires were reported down due to thunderstorm winds in Lasingburgh.

Thunderstorm Wind in RENSSELAER, NEW YORK
From 08-SEP-12 15:36:00 to 08-SEP-12 15:36:00 (EST-5)
Location: CROPSEYVILLE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Multiple trees and wires were reported down due to thunderstorm winds in Brunswick.

Thunderstorm Wind in DUTCHESS, NEW YORK
From 08-SEP-12 16:25:00 to 08-SEP-12 16:25:00 (EST-5)
Location: SPACKENKILL
Magnitude: 50.00 EG
Reported by: Law Enforcement

Several trees and wires were reported down due to thunderstorm winds in Poughkeepsie.

Thunderstorm Wind in DUTCHESS, NEW YORK
From 08-SEP-12 16:46:00 to 08-SEP-12 16:46:00 (EST-5)
Location: HAVILAND
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees were reported down due to thunderstorm winds in Dover Plains.

Thunderstorm Wind in WARREN, NEW YORK
From 08-SEP-12 15:00:00 to 08-SEP-12 15:00:00 (EST-5)
Location: GLEN LAKE
Magnitude: 52.00 EG
Reported by: Trained Spotter

A wind gust during a thunderstorm was estimated to be 60 mph in Queensbury.

Thunderstorm Wind in HERKIMER, NEW YORK
From 08-SEP-12 13:10:00 to 08-SEP-12 13:10:00 (EST-5)
Location: ILION
Magnitude: 50.00 EG
Reported by: Law Enforcement

A tree was reported down due to thunderstorm winds on East North Street in Ilion.

Thunderstorm Wind in HERKIMER, NEW YORK
From 08-SEP-12 13:12:00 to 08-SEP-12 13:12:00 (EST-5)
Location: DOLGEVILLE
Magnitude: 50.00 EG
Reported by: Trained Spotter

A tree was reported down and on wires due to thunderstorm winds in Dolgeville.

Thunderstorm Wind in HERKIMER, NEW YORK
From 08-SEP-12 13:20:00 to 08-SEP-12 13:20:00 (EST-5)
Location: LITTLE FALLS
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds in Little Falls.

Thunderstorm Wind in MONTGOMERY, NEW YORK
From 08-SEP-12 13:45:00 to 08-SEP-12 13:45:00 (EST-5)
Location: ST JOHNSVILLE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Trees were reported down due to thunderstorm winds in St. Johnsville.

Thunderstorm Wind in MONTGOMERY, NEW YORK
From 08-SEP-12 13:57:00 to 08-SEP-12 13:57:00 (EST-5)
Location: CANAJOHARIE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Trees were reported down due to thunderstorm winds in Canajoharie.

Thunderstorm Wind in HAMILTON, NEW YORK
From 08-SEP-12 14:02:00 to 08-SEP-12 14:02:00 (EST-5)
Location: INDIAN LAKE
Magnitude: 50.00 EG
Reported by: Department of Highways

Trees and wires were reported down due to thunderstorm winds in Indian Lake.

Thunderstorm Wind in FULTON, NEW YORK
From 08-SEP-12 14:16:00 to 08-SEP-12 14:16:00 (EST-5)
Location: GLOVERSVILLE
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees were reported down in Gloversville due to thunderstorm winds.

Thunderstorm Wind in FULTON, NEW YORK
From 08-SEP-12 14:21:00 to 08-SEP-12 14:21:00 (EST-5)
Location: MAYFIELD
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees were reported down in Mayfield due to thunderstorm winds.

Thunderstorm Wind in SARATOGA, NEW YORK
From 08-SEP-12 14:35:00 to 08-SEP-12 14:35:00 (EST-5)
Location: EDINBURG
Magnitude: 50.00 EG
Reported by: Public

Trees were reported down due to thunderstorm winds in Edinburg.

Thunderstorm Wind in WARREN, NEW YORK
From 08-SEP-12 14:30:00 to 08-SEP-12 14:30:00 (EST-5)
Location: THURMAN
Magnitude: 50.00 EG
Reported by: Law Enforcement

Numerous trees and wires were reported down due to thunderstorm winds in Thurman.

Thunderstorm Wind in WARREN, NEW YORK
From 08-SEP-12 15:00:00 to 08-SEP-12 15:00:00 (EST-5)
Location: CLOVERDALE
Magnitude: 50.00 EG
Reported by: Public

Trees and wires were reported to be down and blocking a road due to thunderstorm winds in Cleverdale.

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 08-SEP-12 15:00:00 to 08-SEP-12 15:00:00 (EST-5)
Location: GLENVILLE
Magnitude: 50.00 EG
Reported by: Law Enforcement

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

Thunderstorm Wind in SCHENECTADY, NEW YORK
From 08-SEP-12 15:07:00 to 08-SEP-12 15:07:00 (EST-5)
Location: SCHENECTADY
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down in Schenectady due to thunderstorm winds.

Thunderstorm Wind in SCHOHARIE, NEW YORK
From 08-SEP-12 14:50:00 to 08-SEP-12 14:50:00 (EST-5)
Location: SCHOHARIE
Magnitude: 50.00 EG
Reported by: Trained Spotter

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

Thunderstorm Wind in SARATOGA, NEW YORK
From 08-SEP-12 15:12:00 to 08-SEP-12 15:12:00 (EST-5)
Location: HIGHMILLS
Magnitude: 50.00 EG
Reported by: NWS Employee

Trees were reported down on Ashdown Road in Clifton Park due to thunderstorm winds.

Thunderstorm Wind in MONTGOMERY, NEW YORK
From 08-SEP-12 14:15:00 to 08-SEP-12 14:15:00 (EST-5)
Location: FONDA
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down due to thunderstorm winds approximately 1 mile north of Fonda.

Thunderstorm Wind in SCHOHARIE, NEW YORK
From 08-SEP-12 14:35:00 to 08-SEP-12 14:35:00 (EST-5)
Location: RICHMONDVILLE
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees were reported down on wires due to thunderstorm winds in Richmondville.