As an area of low pressure over Wisconsin moved northeast, a stationary boundary over Pennsylvania pushed northward as a warm front during the morning hours. This put much of central New York in the warm sector during the day, and numerous showers and thunderstorms developed later in the day ahead of an approaching cold front and well defined upper level disturbance. Many of the storms that developed produced large hail and damaging winds.

Thunderstorm Wind in DELAWARE, NEW YORK
From 21-JUL-10 13:00:00 to 21-JUL-10 13:00:00 (EST-5)
Location: HANCOCK
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down.

Thunderstorm Wind in DELAWARE, NEW YORK
From 21-JUL-10 12:27:00 to 21-JUL-10 12:27:00 (EST-5)
Location: DEPOSIT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 21-JUL-10 12:35:00 to 21-JUL-10 12:35:00 (EST-5)
Location: LA FAYETTE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous small trees were blown down, and three telephone poles were snapped near the bases.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 21-JUL-10 12:36:00 to 21-JUL-10 12:36:00 (EST-5)
Location: LA FAYETTE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three large trees were blown down on Route 20. Route 20 was impassable near LaFayette. Two hay trailers were blown over on a farm.

Thunderstorm Wind in SULLIVAN, NEW YORK
From 21-JUL-10 14:35:00 to 21-JUL-10 14:35:00 (EST-5)
Location: BRISCOE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down.

Hail in DELAWARE, NEW YORK
From 21-JUL-10 13:11:00 to 21-JUL-10 13:11:00 (EST-5)
Location: TREADWELL
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DELAWARE, NEW YORK
From 21-JUL-10 13:11:00 to 21-JUL-10 13:11:00 (EST-5)
Location: FRANKLIN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in MADISON, NEW YORK
From 21-JUL-10 13:30:00 to 21-JUL-10 13:30:00 (EST-5)
Location: GEORGETOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SULLIVAN, NEW YORK
From 21-JUL-10 15:00:00 to 21-JUL-10 15:00:00 (EST-5)
Location: MONTICELLO
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and power lines were blown down. A patio tent was blown into the road. Pea size hail also fell.

Thunderstorm Wind in SULLIVAN, NEW YORK
From 21-JUL-10 14:10:00 to 21-JUL-10 14:10:00 (EST-5)
Location: PARKSVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down on Aden Hill Road.

Thunderstorm Wind in BROOME, NEW YORK
From 21-JUL-10 15:24:00 to 21-JUL-10 15:24:00 (EST-5)
Location: GLEN AUBREY
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were blown down in Glen Aubrey.

Thunderstorm Wind in SULLIVAN, NEW YORK
From 21-JUL-10 15:00:00 to 21-JUL-10 15:00:00 (EST-5)
Location: KIAMESHA
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down across power lines on Anawana Lake Road. A transformer and telephone pole were knocked down.

Thunderstorm Wind in DELAWARE, NEW YORK
From 21-JUL-10 16:30:00 to 21-JUL-10 16:30:00 (EST-5)
Location: HANCOCK
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and power lines were blown down. Nickel size hail fell.

Hail in BROOME, NEW YORK
From 21-JUL-10 13:30:00 to 21-JUL-10 13:30:00 (EST-5)
Location: BILSBORO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 13:40:00 to 21-JUL-10 13:40:00 (EST-5)
Location: LIVINGSTON MANOR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 14:20:00 to 21-JUL-10 14:20:00 (EST-5)
Location: LONG EDDY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 18:45:00 to 21-JUL-10 18:45:00 (EST-5)
Location: WESTERNVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were blown down.

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 18:55:00 to 21-JUL-10 18:55:00 (EST-5)
Location: FLOYD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were  blown down.

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 18:50:00 to 21-JUL-10 18:50:00 (EST-5)
Location: ROME
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were blown down.

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 18:55:00 to 21-JUL-10 18:55:00 (EST-5)
Location: HOLLAND PATENT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were blown down.

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 18:55:00 to 21-JUL-10 18:55:00 (EST-5)
Location: REMSEN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were blown down.

Hail in CORTLAND, NEW YORK
From 21-JUL-10 14:22:00 to 21-JUL-10 14:22:00 (EST-5)
Location: CORTLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 14:26:00 to 21-JUL-10 14:26:00 (EST-5)
Location: DRYDEN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in DELAWARE, NEW YORK
From 21-JUL-10 13:35:00 to 21-JUL-10 13:35:00 (EST-5)
Location: HAMDEN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.

Funnel Cloud in CHENANGO, NEW YORK
From 21-JUL-10 12:07:00 to 21-JUL-10 12:07:00 (EST-5)
Location: AFTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SENECA, NEW YORK
From 21-JUL-10 11:21:00 to 21-JUL-10 11:21:00 (EST-5)
Location: COVERT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:25:00 to 21-JUL-10 11:25:00 (EST-5)
Location: TRUMANSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was blown down in the village.

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 14:31:00 to 21-JUL-10 14:31:00 (EST-5)
Location: JEFFERSONVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 14:40:00 to 21-JUL-10 14:40:00 (EST-5)
Location: SWAN LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 14:45:00 to 21-JUL-10 14:45:00 (EST-5)
Location: MONTICELLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 14:45:00 to 21-JUL-10 14:45:00 (EST-5)
Location: SWAN LAKE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:30:00 to 21-JUL-10 11:30:00 (EST-5)
Location: TRUMANSBURG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ONEIDA, NEW YORK
From 21-JUL-10 19:10:00 to 21-JUL-10 19:10:00 (EST-5)
Location: DEERFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were blown down.

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:40:00 to 21-JUL-10 11:40:00 (EST-5)
Location: ETNA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:45:00 to 21-JUL-10 11:45:00 (EST-5)
Location: DRYDEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:46:00 to 21-JUL-10 11:46:00 (EST-5)
Location: ETNA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 12:05:00 to 21-JUL-10 12:05:00 (EST-5)
Location: ITHACA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ONONDAGA, NEW YORK
From 21-JUL-10 12:31:00 to 21-JUL-10 12:31:00 (EST-5)
Location: LA FAYETTE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, NEW YORK
From 21-JUL-10 13:10:00 to 21-JUL-10 13:10:00 (EST-5)
Location: FISHS EDDY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROOME, NEW YORK
From 21-JUL-10 17:45:00 to 21-JUL-10 17:45:00 (EST-5)
Location: VESTAL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROOME, NEW YORK
From 21-JUL-10 18:03:00 to 21-JUL-10 18:03:00 (EST-5)
Location: VESTAL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime to nickel size hail fell at Binghamton University.

Hail in BROOME, NEW YORK
From 21-JUL-10 15:05:00 to 21-JUL-10 15:05:00 (EST-5)
Location: TRIANGLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SULLIVAN, NEW YORK
From 21-JUL-10 15:09:00 to 21-JUL-10 15:09:00 (EST-5)
Location: ROCK HILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHENANGO, NEW YORK
From 21-JUL-10 15:10:00 to 21-JUL-10 15:10:00 (EST-5)
Location: GREENE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TIOGA, NEW YORK
From 21-JUL-10 15:35:00 to 21-JUL-10 15:35:00 (EST-5)
Location: WEST NEWARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROOME, NEW YORK
From 21-JUL-10 15:45:00 to 21-JUL-10 15:45:00 (EST-5)
Location: HARPURSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ONEIDA, NEW YORK
From 21-JUL-10 19:05:00 to 21-JUL-10 19:05:00 (EST-5)
Location: CLINTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in TOMPKINS, NEW YORK
From 21-JUL-10 11:33:00 to 21-JUL-10 11:33:00 (EST-5)
Location: MC KINNEYS PT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees and power lines were blown down in the town of Lansing.

Thunderstorm Wind in BROOME, NEW YORK
From 21-JUL-10 12:15:00 to 21-JUL-10 12:15:00 (EST-5)
Location: WINDSOR
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees and power lines were blown down.

Thunderstorm Wind in CHENANGO, NEW YORK
From 21-JUL-10 13:05:00 to 21-JUL-10 13:05:00 (EST-5)
Location: BAINBRIDGE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Many trees and power lines were blown down.

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 17:10:00 to 21-JUL-10 17:10:00 (EST-5)
Location: SLATERVILLE SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CHENANGO, NEW YORK
From 21-JUL-10 13:05:00 to 21-JUL-10 13:05:00 (EST-5)
Location: AFTON
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Many trees and power lines were blown down.

Thunderstorm Wind in CHENANGO, NEW YORK
From 21-JUL-10 13:00:00 to 21-JUL-10 13:00:00 (EST-5)
Location: GREENE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Many trees and power lines were blown down in the town of Greene, on county route 32 and county 2.

Thunderstorm Wind in SENECA, NEW YORK
From 21-JUL-10 11:23:00 to 21-JUL-10 11:23:00 (EST-5)
Location: INTERLAKEN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were knocked down.

Thunderstorm Wind in ONONDAGA, NEW YORK
From 21-JUL-10 12:33:00 to 21-JUL-10 12:33:00 (EST-5)
Location: LA FAYETTE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CAYUGA, NEW YORK
From 21-JUL-10 11:45:00 to 21-JUL-10 11:45:00 (EST-5)
Location: PORT BYRON
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees and power lines were blown down. The most damage occurred along Route 38 and Centerport Road.

Thunderstorm Wind in CORTLAND, NEW YORK
From 21-JUL-10 14:45:00 to 21-JUL-10 14:50:00 (EST-5)
Location: MARATHON
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Significant wind damage occurred along Rout 134B, Divers Crossing Road. Hundreds of
trees were snapped and uprooted. The area was about 2 1/2 miles long and 1/2 mile wide. Four homes and one business had damage to roofs from fallen trees. Two structures showed minor wind damage to roofs. Winds were estimated at 70 to 80 mph.

Thunderstorm Wind in CAYUGA, NEW YORK
From 21-JUL-10 11:50:00 to 21-JUL-10 12:05:00 (EST-5)
Location: MONTEZUMA
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees were blown down from Montezuma to Throop. The event occurred from 12:50 pm to 1:05 pm.

Thunderstorm Wind in SENECA, NEW YORK
From 21-JUL-10 13:30:00 to 21-JUL-10 13:30:00 (EST-5)
Location: WATERLOO
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down.

Hail in TOMPKINS, NEW YORK
From 21-JUL-10 11:40:00 to 21-JUL-10 11:40:00 (EST-5)
Location: DRYDEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public