A strong upper level storm system moved across the region Tuesday and forced a strong cold front across New York and Pennsylvania. Two separate lines of showers and thunderstorms quickly developed across the region among a very unstable atmosphere. As these lines moved east, the storms quickly became severe and produced damaging winds, large hail and a few tornadoes.

Hail in ONEIDA, NEW YORK
From 22-AUG-17 15:20:00 to 22-AUG-17 15:30:00 (EST-5)
Location: VERONA
Magnitude: 1.75 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A thunderstorm developed over the area and produced golf ball sized hail.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 14:08:00 to 22-AUG-17 14:18:00 (EST-5)
Location: JACKSONVILLE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 14:27:00 to 22-AUG-17 14:37:00 (EST-5)
Location: LYNCOURT
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 14:31:00 to 22-AUG-17 14:41:00 (EST-5)
Location: NORTH SYRACUSE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 14:41:00 to 22-AUG-17 14:51:00 (EST-5)
Location: NORTH SYRACUSE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 14:52:00 to 22-AUG-17 15:02:00 (EST-5)
Location: NORTH SYRACUSE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in CAYUGA, NEW YORK
From 22-AUG-17 15:10:00 to 22-AUG-17 15:20:00 (EST-5)
Location: SEMPRONIUS
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 15:10:00 to 22-AUG-17 15:20:00 (EST-5)
Location: CLAY
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 15:14:00 to 22-AUG-17 15:24:00 (EST-5)
Location: SOUTH BAY
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 16:07:00 to 22-AUG-17 16:17:00 (EST-5)
Location: FAWN RIDGE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 22-AUG-17 16:10:00 to 22-AUG-17 16:20:00 (EST-5)
Location: LONG BRIDGE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in TOMPKINS, NEW YORK
From 22-AUG-17 16:36:00 to 22-AUG-17 16:46:00 (EST-5)
Location: MC KINNEYS PT
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in TOMPKINS, NEW YORK
From 22-AUG-17 16:36:00 to 22-AUG-17 16:46:00 (EST-5)
Location: GROTTO
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in MADISON, NEW YORK
From 22-AUG-17 17:30:00 to 22-AUG-17 17:40:00 (EST-5)
Location: MIDDLEPORT
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and knocked over trees and wires.

Thunderstorm Wind in CORTLAND, NEW YORK
From 22-AUG-17 16:54:00 to 22-AUG-17 17:04:00 (EST-5)
Location: CORTLAND
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm moved across the region and became severe. This thunderstorm produced a severe wind gust of 52 knots.

Tornado in MADISON, NEW YORK
From 22-AUG-17 15:55:00 to 22-AUG-17 15:56:00 (EST-5)
Location: GEORGETOWN
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado briefly touched down along Parker Hill Road in Georgetown, NY. The tornado did  extensive damage to a forest largely composed of Norway spruce and other softwood  conifers. The tornado damage path was very narrow only being 30 yards wide. Maximum winds were estimated at 90 mph.

Tornado in MADISON, NEW YORK
From 22-AUG-17 16:25:00 to 22-AUG-17 16:26:00 (EST-5)
Location: NORTH BROOKFIELD
Tornado F-scale: EF0
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in a field west of Mason Road in Brookfield
NY. The tornado knocked down a couple dozen trees, partially blew
roofs off two barns and ripped a roof off a greenhouse. One home
lost a few shingles. The tornado tracked east northeast and was on
the ground for a little less than one half mile. The width of the
tornado was about 150 yards.  Maximum winds were estimated at 90 mph.