An upper level disturbance in close proximity to a departing warm front triggered numerous severe thunderstorms across Southeastern New York. These storms produced a tornado in Montgomery, NY in Orange County.

Tornado in ORANGE, NEW YORK
From 27-AUG-20 17:15:00 to 27-AUG-20 17:20:00 (EST-5)
Location: KAISERTOWN
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

EF1 Tornado in Montgomery, NY. Maximum path length was 600 yards and a path length of 2.6 miles.
A National Weather Service storm survey team confirmed an EF1
tornado in Montgomery, Orange County, NY. The tornado likely
touched down on the northwest side of the Orange County Airport
near the Wallkill River. Straight line winds on the southern flank
of the tornado likely caused tree damage at the Intersection of
Route 211 and Canning Road as well as minor structural damage
noted to two buildings on the airport. A temporary meteorological
station, installed on the airfield to support this weekend's
airshow, measured sustained winds of 69 mph with a peak gust of 82
mph before the communications went out.
The tornado moved east from near the river into the village of
Montgomery, where damage was extensive along Weaver Street, as
well as Chandler Lane. The tornado then continued eastward across
Beaver Dam Road to Old Nealytown Road where it ended. The bulk of
the damage consisted of large snapped and uprooted trees.

Thunderstorm Wind in PUTNAM, NEW YORK
From 27-AUG-20 18:00:00 to 27-AUG-20 18:00:00 (EST-5)
Location: LAKE MAHOPAC
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees snapped and uprooted and power lines down.

Thunderstorm Wind in ORANGE, NEW YORK
From 27-AUG-20 17:23:00 to 27-AUG-20 17:23:00 (EST-5)
Location: THOMPSON RIDGE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees down on State Highway 302 North of County Route 17.

Hail in ORANGE, NEW YORK
From 27-AUG-20 17:30:00 to 27-AUG-20 17:30:00 (EST-5)
Location: MONTGOMERY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported quarter sized hail.

Thunderstorm Wind in ORANGE, NEW YORK
From 27-AUG-20 17:30:00 to 27-AUG-20 17:30:00 (EST-5)
Location: MONTGOMERY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated a 70 mph wind gust along with quarter sized hail.

Thunderstorm Wind in ORANGE, NEW YORK
From 27-AUG-20 15:22:00 to 27-AUG-20 15:22:00 (EST-5)
Location: WALDEN
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree limbs down with medium sized trees snapped.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 27-AUG-20 15:38:00 to 27-AUG-20 15:38:00 (EST-5)
Location: CUTCHOGUE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Social Media

Large branch reported down.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 27-AUG-20 15:40:00 to 27-AUG-20 15:40:00 (EST-5)
Location: EAST CUTCHOGUE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Social Media

Large tree limb down near Oregon Road and Bridge Lane.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 27-AUG-20 15:40:00 to 27-AUG-20 15:40:00 (EST-5)
Location: BEIXEDON ESTATES
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree reported down blocking Route 48.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 27-AUG-20 15:40:00 to 27-AUG-20 15:40:00 (EST-5)
Location: GREENPORT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree reported down and blocking Willow Drive.

Thunderstorm Wind in WESTCHESTER, NEW YORK
From 27-AUG-20 16:04:00 to 27-AUG-20 16:04:00 (EST-5)
Location: SOMERS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down blocking Somers Road between Somerset Drive and Crane Road.

Hail in WESTCHESTER, NEW YORK
From 27-AUG-20 16:15:00 to 27-AUG-20 16:15:00 (EST-5)
Location: SOUTH SALEM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reports of nickel sized hail lasting for several minutes.

Thunderstorm Wind in WESTCHESTER, NEW YORK
From 27-AUG-20 16:16:00 to 27-AUG-20 16:16:00 (EST-5)
Location: BOUTONVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree reported down on NY-123 north of Elmwood Road.

Thunderstorm Wind in WESTCHESTER, NEW YORK
From 27-AUG-20 16:18:00 to 27-AUG-20 16:18:00 (EST-5)
Location: POUND RIDGE
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and wires down on the north side of town.

Thunderstorm Wind in PUTNAM, NEW YORK
From 27-AUG-20 18:00:00 to 27-AUG-20 18:00:00 (EST-5)
Location: CARMEL
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines down through the town.

Thunderstorm Wind in PUTNAM, NEW YORK
From 27-AUG-20 18:05:00 to 27-AUG-20 18:05:00 (EST-5)
Location: BREWSTER
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple large trees reported down on power lines.

Thunderstorm Wind in NASSAU, NEW YORK
From 27-AUG-20 19:26:00 to 27-AUG-20 19:26:00 (EST-5)
Location: EAST ROCKAWAY
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wires reported down on Murdock Avenue just west of Lawson Boulevard.

Thunderstorm Wind in NASSAU, NEW YORK
From 27-AUG-20 19:31:00 to 27-AUG-20 19:31:00 (EST-5)
Location: ATLANTIC BEACH
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wires and power lines down on Putnam Boulevard.

Hail in SUFFOLK, NEW YORK
From 27-AUG-20 17:52:00 to 27-AUG-20 17:52:00 (EST-5)
Location: CENTEREACH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail lasted for three minutes.