A pre-frontal trough well ahead of a cold front moved into a sultry airmass with ample instability and wind shear. A weak supercell formed near Erie, Pennsylvania and grew as it encountered an outflow from earlier convection. The storm continued to intensify as it moved across the western southern tier of New York and reach severe limits as it cross the eastern Finger Lakes and eastern Lake Ontario Regions of New York. The thunderstorms produced hail up to three-quarter inch in diameter and wind gusts were estimated to near 70 mph. The storms cut power to nearly 75,000 customers for several hours through the evening. Falling trees damaged homes and automobiles in Avon and York, Livingston county and Phoenix, Oswego and Sandy Pond in Oswego county. Oswego County was particularly hard hit. In Sandy Creek, between 500 and 600 trees were downed at the Elms Golf Club. The utilities reported about 100 power poles downed by the storms. Two funnels were spotted���one in Cayuga County and one in Jefferson County however no touchdown occurred in either case. One death occurred with the storms. In the town of Croghan, a 47-year-old logger was crushed by a falling tree.

Thunderstorm Wind in LEWIS, NEW YORK
From 10-JUN-08 11:15:00 to 10-JUN-08 11:15:00 (EST-5)
Location: CROGHAN
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LEWIS, NEW YORK
From 10-JUN-08 12:12:00 to 10-JUN-08 12:12:00 (EST-5)
Location: HARRISVILLE
Magnitude: 55.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in OSWEGO, NEW YORK
From 10-JUN-08 10:30:00 to 10-JUN-08 10:30:00 (EST-5)
Location: SANDY CREEK
Magnitude: 58.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LEWIS, NEW YORK
From 10-JUN-08 11:09:00 to 10-JUN-08 11:09:00 (EST-5)
Location: ALPINA
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MONROE, NEW YORK
From 10-JUN-08 09:00:00 to 10-JUN-08 09:00:00 (EST-5)
Location: PITTSFORD
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MONROE, NEW YORK
From 10-JUN-08 08:45:00 to 10-JUN-08 08:45:00 (EST-5)
Location: HONEOYE FALLS ARPT
Magnitude: 0.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in OSWEGO, NEW YORK
From 10-JUN-08 10:06:00 to 10-JUN-08 10:06:00 (EST-5)
Location: OSWEGO
Magnitude: 50.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Funnel Cloud in JEFFERSON, NEW YORK
From 10-JUN-08 11:15:00 to 10-JUN-08 11:15:00 (EST-5)
Location: LORRAINE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in JEFFERSON, NEW YORK
From 10-JUN-08 11:15:00 to 10-JUN-08 11:15:00 (EST-5)
Location: LORRAINE
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in OSWEGO, NEW YORK
From 10-JUN-08 10:20:00 to 10-JUN-08 10:20:00 (EST-5)
Location: PULASKI
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LIVINGSTON, NEW YORK
From 10-JUN-08 08:30:00 to 10-JUN-08 08:30:00 (EST-5)
Location: ASHANTEE
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Funnel Cloud in CAYUGA, NEW YORK
From 10-JUN-08 10:05:00 to 10-JUN-08 10:05:00 (EST-5)
Location: CATO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in OSWEGO, NEW YORK
From 10-JUN-08 10:05:00 to 10-JUN-08 10:05:00 (EST-5)
Location: FULTON
Magnitude: 50.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Amateur Radio