A surface cold front and powerful upper level disturbance moved across northern New York during the evening hours of May 1st with a line of strong to severe thunderstorms.
These thunderstorms produced lots of tree and power line damage as well as some light structural damage to a few roofs in St. Lawrence county.

Thunderstorm Wind in ST. LAWRENCE, NEW YORK
From 01-MAY-17 18:00:00 to 01-MAY-17 18:02:00 (EST-5)
Location: PITCAIRN
Magnitude: 70.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Local Official

Numerous trees down, roof damage to garages and small buildings, numerous power lines down throughout town.

Thunderstorm Wind in ST. LAWRENCE, NEW YORK
From 01-MAY-17 18:06:00 to 01-MAY-17 18:07:00 (EST-5)
Location: FINE
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines down.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:08:00 to 01-MAY-17 19:08:00 (EST-5)
Location: MALONE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few trees down.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:08:00 to 01-MAY-17 19:08:00 (EST-5)
Location: WESTVILLE CENTER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines down.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:10:00 to 01-MAY-17 19:10:00 (EST-5)
Location: CONSTABLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees down.

Thunderstorm Wind in ST. LAWRENCE, NEW YORK
From 01-MAY-17 18:12:00 to 01-MAY-17 18:12:00 (EST-5)
Location: RUSSELL
Magnitude: 55.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines down in various locations in southern St. Lawrence county, including Russell.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:02:00 to 01-MAY-17 19:02:00 (EST-5)
Location: BANGOR
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines down.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:00:00 to 01-MAY-17 19:00:00 (EST-5)
Location: BOMBAY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines down.

Thunderstorm Wind in CLINTON, NEW YORK
From 01-MAY-17 19:25:00 to 01-MAY-17 19:25:00 (EST-5)
Location: LYON MTN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Utility Company

Several trees and power lines down.

Thunderstorm Wind in ESSEX, NEW YORK
From 01-MAY-17 19:25:00 to 01-MAY-17 19:25:00 (EST-5)
Location: NEWCOMB
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Utility Company

Several trees and power lines down.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 01-MAY-17 19:16:00 to 01-MAY-17 19:16:00 (EST-5)
Location: BURKE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines down.

Thunderstorm Wind in ESSEX, NEW YORK
From 01-MAY-17 19:30:00 to 01-MAY-17 19:30:00 (EST-5)
Location: LAKE PLACID
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees down.

Thunderstorm Wind in CLINTON, NEW YORK
From 01-MAY-17 19:31:00 to 01-MAY-17 19:31:00 (EST-5)
Location: REDFORD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Utility Company

Several trees and power lines down.