A sharp short wave trough embedded within a broad upper level trough over the northeastern U.S. supported a wave of convection that moved across the entire area. A precipitable water value of 1.65 inches was observed on the KBUF sounding, and models suggested over 2 inches in portions of the area. This combined with an incoming mesoscale convective vortex to drive slow-moving and heavy rain-producing thunderstorms. While shear was minimal in the environment, the MCV resulted in locally higher shear values, which enhanced wind damage across portions of the area.

Heavy Rain in ERIE, NEW YORK
From 11-JUL-20 13:00:00 to 11-JUL-20 19:30:00 (EST-5)
Location: MILLGROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall of 2.72 inches was reported.

Heavy Rain in MONROE, NEW YORK
From 11-JUL-20 15:54:00 to 11-JUL-20 20:54:00 (EST-5)
Location: MAPLEWOOD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Rainfall of 3.18 inches was reported.

Thunderstorm Wind in WAYNE, NEW YORK
From 11-JUL-20 13:30:00 to 11-JUL-20 13:30:00 (EST-5)
Location: FRUITLAND
Magnitude: 51.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees were reported down across an individuals property.

Thunderstorm Wind in WAYNE, NEW YORK
From 11-JUL-20 14:47:00 to 11-JUL-20 14:47:00 (EST-5)
Location: MACEDON LAKESTONE AR
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down.

Thunderstorm Wind in WAYNE, NEW YORK
From 11-JUL-20 15:08:00 to 11-JUL-20 15:08:00 (EST-5)
Location: MARION
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and wires were reported down onto a road.

Thunderstorm Wind in LEWIS, NEW YORK
From 11-JUL-20 17:03:00 to 11-JUL-20 17:03:00 (EST-5)
Location: CASTORLAND
Magnitude: 51.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported down on a road in Castorland.

Thunderstorm Wind in LEWIS, NEW YORK
From 11-JUL-20 17:06:00 to 11-JUL-20 17:06:00 (EST-5)
Location: LYONS FALLS
Magnitude: 51.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported down onto wires on River Road.

Flood in ERIE, NEW YORK
From 11-JUL-20 13:53:00 to 11-JUL-20 15:00:00 (EST-5)
Location: COLLINS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding was reported on Collins Road.

Flash Flood in CATTARAUGUS, NEW YORK
From 11-JUL-20 15:12:00 to 11-JUL-20 16:30:00 (EST-5)
Location: SOUTH DAYTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple roads were closed due to flooding in South Dayton.

Flash Flood in MONROE, NEW YORK
From 11-JUL-20 15:50:00 to 11-JUL-20 17:50:00 (EST-5)
Location: PT PLEASANT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding was reported on Route 104, Culver Road, North Goodman Street, and on Panorama Trail. Two men were thrown from a raft in flood waters and swam to safety.

Flash Flood in MONROE, NEW YORK
From 11-JUL-20 16:00:00 to 11-JUL-20 18:00:00 (EST-5)
Location: WEST WEBSTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Five Mile Lane Road was flooded.

Flash Flood in LIVINGSTON, NEW YORK
From 11-JUL-20 17:58:00 to 11-JUL-20 19:00:00 (EST-5)
Location: GROVELAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Route 36 in West Sparta was closed due to flash flooding.