A rapidly intensifying low pressure system advanced through the western Great Lakes and eventually spun up toward James Bay. This pushed a cold front across the area during the latter half of November 15. Along the cold front, shallow convection developed with widespread non-severe hail and widespread wind gusts over 60 mph. In the wake of the front, a second and longer-lasting period of non-convective high winds persisted through much of the evening and into the overnight east of Lake Ontario. Widespread damage was reported from both the thunderstorm winds and non-thunderstorm winds. Lake Erie topped 11.13 feet at Buffalo due to the first seiche with the frontal boundary thunderstorms then secondarily topped 10.34 feet with the non-convective wind increase in the evening. This resulted in flooding and some evacuations in Angola, Hamburg, and the Old First Ward in Buffalo. Selected peak wind gusts during the afternoon and evening include 60 mph at Wellsville, 69 mph in Fredonia, 69 mph at the Buffalo Coast Guard, 67 mph at the Buffalo Niagara International Airport, 58 mph in Batavia, 58 mph at Fort Drum, 60 mph in Brockport, 62 mph at Niagara Falls Airport, and 59 mph in Warsaw.

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:07:00 to 15-NOV-20 18:07:00 (EST-5)
Location: ADAMS
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:07:00 to 15-NOV-20 18:07:00 (EST-5)
Location: ALEXANDRIA BAY ARPT
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

Thunderstorm Wind in LEWIS, NEW YORK
From 15-NOV-20 18:43:00 to 15-NOV-20 18:43:00 (EST-5)
Location: LOWVILLE
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

Thunderstorm Wind in LEWIS, NEW YORK
From 15-NOV-20 18:56:00 to 15-NOV-20 18:56:00 (EST-5)
Location: BEACHES BRIDGE
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:45:00 to 15-NOV-20 15:45:00 (EST-5)
Location: GRIFFIN MILLS
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CATTARAUGUS, NEW YORK
From 15-NOV-20 15:50:00 to 15-NOV-20 15:50:00 (EST-5)
Location: EAST RANDOLPH
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:20:00 to 15-NOV-20 15:20:00 (EST-5)
Location: FOREST GLEN
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage reported in the Town of Hamburg.

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:25:00 to 15-NOV-20 15:25:00 (EST-5)
Location: TONAWANDA
Magnitude: 51.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees and power lines were reported down.

Thunderstorm Wind in LEWIS, NEW YORK
From 15-NOV-20 19:01:00 to 15-NOV-20 19:01:00 (EST-5)
Location: GREIG
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

High Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High Wind in LEWIS, NEW YORK
From 15-NOV-20 18:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in ALLEGANY, NEW YORK
From 15-NOV-20 16:39:00 to 15-NOV-20 16:39:00 (EST-5)
Location: WELLSVILLE TARNTNE F
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:26:00 to 15-NOV-20 15:26:00 (EST-5)
Location: LAKE VIEW
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Trees down onto Heltz Road.

High Wind in ALLEGANY, NEW YORK
From 15-NOV-20 18:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High Wind in CATTARAUGUS, NEW YORK
From 15-NOV-20 18:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lakeshore Flood in NORTHERN ERIE, NEW YORK
From 15-NOV-20 17:00:00 to 15-NOV-20 22:30:00 (EST-5)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding and evacuations reported in the Old First Ward in the City of Buffalo.

Lakeshore Flood in CHAUTAUQUA, NEW YORK
From 15-NOV-20 17:00:00 to 15-NOV-20 22:30:00 (EST-5)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Social Media

Flooding of homes reported on Sunset Bay Beach in Irving.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 15-NOV-20 15:28:00 to 15-NOV-20 15:28:00 (EST-5)
Location: JAMESTOWN WEST
Magnitude: 51.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was downed onto Stewart Avenue.

Thunderstorm Wind in CHAUTAUQUA, NEW YORK
From 15-NOV-20 15:29:00 to 15-NOV-20 15:29:00 (EST-5)
Location: JAMESTOWN
Magnitude: 51.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

A large spruce tree was downed.

High Wind in CHAUTAUQUA, NEW YORK
From 15-NOV-20 07:00:00 to 15-NOV-20 23:00:00 (EST-5)
Magnitude: 60.00 MG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Buoy

High Wind in SOUTHERN ERIE, NEW YORK
From 15-NOV-20 07:00:00 to 15-NOV-20 23:00:00 (EST-5)
Magnitude: 59.00 MG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:30:00 to 15-NOV-20 15:30:00 (EST-5)
Location: WOODLAWN
Magnitude: 51.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

A large billboard was downed on Route 5 in Lackawanna.

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:31:00 to 15-NOV-20 15:31:00 (EST-5)
Location: ELLICOTT
Magnitude: 51.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

A tree was downed onto Gartman Road near Scherff Road.

High Wind in NORTHERN ERIE, NEW YORK
From 15-NOV-20 15:30:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 60.00 MG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: WLON

High Wind in NIAGARA, NEW YORK
From 15-NOV-20 15:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in ONTARIO, NEW YORK
From 15-NOV-20 17:10:00 to 15-NOV-20 17:10:00 (EST-5)
Location: PORT GIBSON
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:32:00 to 15-NOV-20 15:32:00 (EST-5)
Location: EBENEZER
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree and powerlines were reported downed.

Thunderstorm Wind in ALLEGANY, NEW YORK
From 15-NOV-20 16:25:00 to 15-NOV-20 16:25:00 (EST-5)
Location: OBI
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Lakeshore Flood in NIAGARA, NEW YORK
From 15-NOV-20 17:12:00 to 15-NOV-20 22:24:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: WLON

A water level of 11.12 feet was reported on the Buffalo gauge, which brings water on shore along the upper Niagara River.

Thunderstorm Wind in WAYNE, NEW YORK
From 15-NOV-20 16:57:00 to 15-NOV-20 16:57:00 (EST-5)
Location: WILLIAMSON
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Thunderstorm Wind in WAYNE, NEW YORK
From 15-NOV-20 17:01:00 to 15-NOV-20 17:01:00 (EST-5)
Location: MARION
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Lakeshore Flood in SOUTHERN ERIE, NEW YORK
From 15-NOV-20 17:00:00 to 15-NOV-20 22:30:00 (EST-5)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding of homes reported Hoover Beach in Hamburg. Route 5 closed due to flooding.

Seiche in NORTHERN ERIE, NEW YORK
From 15-NOV-20 17:00:00 to 15-NOV-20 22:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

The gauge on Lake Erie at Buffalo rose to 11.12 feet with thunderstorms at 6:18 PM then secondarily rose to 10.34 feet at 9:24 PM with a second and longer-lasting surge of post-cold frontal wind gusts.

High Wind in ORLEANS, NEW YORK
From 15-NOV-20 16:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in WAYNE, NEW YORK
From 15-NOV-20 17:07:00 to 15-NOV-20 17:07:00 (EST-5)
Location: SODUS
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Thunderstorm Wind in WAYNE, NEW YORK
From 15-NOV-20 17:25:00 to 15-NOV-20 17:25:00 (EST-5)
Location: WOLCOTT
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

High Wind in GENESEE, NEW YORK
From 15-NOV-20 16:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 50.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:17:00 to 15-NOV-20 18:17:00 (EST-5)
Location: DEFERIET
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in WAYNE, NEW YORK
From 15-NOV-20 17:31:00 to 15-NOV-20 17:31:00 (EST-5)
Location: RED CREEK
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Thunderstorm Wind in CAYUGA, NEW YORK
From 15-NOV-20 17:35:00 to 15-NOV-20 17:35:00 (EST-5)
Location: VICTORY
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:16:00 to 15-NOV-20 15:16:00 (EST-5)
Location: ANGOLA ARPT
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Trees were reported down onto Versailles Plank Road new New Jerusalem Road.

Thunderstorm Wind in CAYUGA, NEW YORK
From 15-NOV-20 17:38:00 to 15-NOV-20 17:38:00 (EST-5)
Location: CONQUEST
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines were reported downed.

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 17:57:00 to 15-NOV-20 17:57:00 (EST-5)
Location: ELLISBURG
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were downed blocking a roadway.

Thunderstorm Wind in NIAGARA, NEW YORK
From 15-NOV-20 15:14:00 to 15-NOV-20 15:14:00 (EST-5)
Location: (IAG)NIAGARA FALLS A
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in ERIE, NEW YORK
From 15-NOV-20 15:44:00 to 15-NOV-20 15:44:00 (EST-5)
Location: WILLIAMSVILLE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in WYOMING, NEW YORK
From 15-NOV-20 16:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 51.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in MONROE, NEW YORK
From 15-NOV-20 17:00:00 to 16-NOV-20 00:00:00 (EST-5)
Magnitude: 52.00 MG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:01:00 to 15-NOV-20 18:01:00 (EST-5)
Location: LA FARGEVILLE
Magnitude: 51.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported downed.

Thunderstorm Wind in JEFFERSON, NEW YORK
From 15-NOV-20 18:07:00 to 15-NOV-20 18:07:00 (EST-5)
Location: ADAMS
Magnitude: 51.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A barn was blown down on Route 78.