Showers and thunderstorms developed in a warm, moist, unstable air mass as a cold front approached from the west.  The thunderstorms produced damaging winds. Hail up to one-inch in diameter fell near Sherman. The thunderstorm winds downed trees and power lines. In Cherry Creek and Leon, both in Cattaraugus County, several roads were blocked by fallen trees. In Springwater, in Livingston County, a house was damaged when thunderstorm winds knocked a tree onto it.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 10-JUL-13 15:53:00 to 10-JUL-13 15:53:00 (EST-5)
Location: SHERMAN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down by thunderstorm winds.

Hail in CHAUTAUQUA, NEW YORK
From 10-JUL-13 15:58:00 to 10-JUL-13 15:58:00 (EST-5)
Location: SHERMAN
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 10-JUL-13 16:07:00 to 10-JUL-13 16:07:00 (EST-5)
Location: CHAUTAUQUA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down by thunderstorm winds.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 10-JUL-13 16:15:00 to 10-JUL-13 16:15:00 (EST-5)
Location: LAKEWOOD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down by thunderstorm winds.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 10-JUL-13 16:21:00 to 10-JUL-13 16:21:00 (EST-5)
Location: FALCONER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down by thunderstorm winds.

Thunderstorm Wind in CATTARAUGUS, NEW YORK
From 10-JUL-13 16:30:00 to 10-JUL-13 16:30:00 (EST-5)
Location: LEON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down on Riga Road by thunderstorm winds.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 10-JUL-13 16:30:00 to 10-JUL-13 16:30:00 (EST-5)
Location: CHERRY CREEK
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees downed by thunderstorm winds were blocking Highway 83.

Thunderstorm Wind in CATTARAUGUS, NEW YORK
From 10-JUL-13 16:53:00 to 10-JUL-13 16:53:00 (EST-5)
Location: SALAMANCA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported power lines down by thunderstorm winds.

Thunderstorm Wind in ALLEGANY, NEW YORK
From 10-JUL-13 17:39:00 to 10-JUL-13 17:39:00 (EST-5)
Location: HOUGHTON COLLEGE ARP
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down by thunderstorm winds.

Thunderstorm Wind in ALLEGANY, NEW YORK
From 10-JUL-13 17:53:00 to 10-JUL-13 17:53:00 (EST-5)
Location: SCIO
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down by thunderstorm winds.

Thunderstorm Wind in LIVINGSTON, NEW YORK
From 10-JUL-13 17:58:00 to 10-JUL-13 17:58:00 (EST-5)
Location: PORTAGE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

A cooperative observer reported trees down by thunderstorm winds.

Thunderstorm Wind in LIVINGSTON, NEW YORK
From 10-JUL-13 18:02:00 to 10-JUL-13 18:02:00 (EST-5)
Location: NUNDA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down by thunderstorm winds.

Thunderstorm Wind in LIVINGSTON, NEW YORK
From 10-JUL-13 18:25:00 to 10-JUL-13 18:25:00 (EST-5)
Location: SPRINGWATER
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a large tree downed by thunderstorm winds fell on a house.