There was significant flash flooding including a building collapse and a water rescue in Canandaigua in the late afternoon as some estimates point to a 100 year flood event. A state of emergency was declared for Ontario county. Flash flooding also occurred in portions of Lewis County into the early evening. Numerous roads in these counties were flooded and impassable with some washed out. A weak wave of low pressure stalled along a trough combined with increasing moisture and instability to focus waves of showers and thunderstorms with very heavy rain. The axis of heaviest rain stretched from Ontario County to Lewis County. Rainfall amounts along this axis were uneven, but there were pockets of extreme rainfall with over 5.5 inches near Canandaigua in Ontario county and over 4 inches between Lowville and Croghan in Lewis county.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 16:30:00 to 09-JUL-23 18:30:00 (EST-5)
Location: MENTETH PT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A water rescue occurred on Barnes Road.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 16:30:00 to 09-JUL-23 18:30:00 (EST-5)
Location: CHESHIRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Smith Road flooded and impassable.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 16:30:00 to 09-JUL-23 16:30:00 (EST-5)
Location: CANANDAIGUA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Building collapsed on Parrish Street extension as foundation eroded away due to flooding. Nobody was inside.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:15:00 to 09-JUL-23 17:15:00 (EST-5)
Location: PADDELFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Yerkes Road was impassable due to a large volume of water rushing over the road.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:20:00 to 09-JUL-23 19:20:00 (EST-5)
Location: CANANDAIGUA FLD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large volume of water was reported flowing across Cooley Road and Short Road with both roads impassable.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:30:00 to 09-JUL-23 19:30:00 (EST-5)
Location: CANANDAIGUA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Numerous road closures reported in Canandaigua, including roads near the shoreline of Canandaigua Lake.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:30:00 to 09-JUL-23 19:30:00 (EST-5)
Location: CANANDAIGUA FLD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County road 30 closed due to flooding. Evacuations occurring at the Happiness House on Independence Lane.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:30:00 to 09-JUL-23 19:30:00 (EST-5)
Location: HOLCOMB CREEKSIDE AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Yerkes Road is flooded and completely impassable.

Flash Flood in LEWIS, NEW YORK
From 09-JUL-23 17:45:00 to 09-JUL-23 20:45:00 (EST-5)
Location: BEACHES BRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Snell Road was washed out due to flooding.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 17:45:00 to 09-JUL-23 19:45:00 (EST-5)
Location: CANANDAIGUA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Buffalo street and surrounding streets are impassable due to flooding.

Flash Flood in ONTARIO, NEW YORK
From 09-JUL-23 18:00:00 to 09-JUL-23 19:45:00 (EST-5)
Location: CANANDAIGUA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Residents are kayaking on Arlington Park and Dorset Drive in flooded roadways.

Flash Flood in LEWIS, NEW YORK
From 09-JUL-23 18:10:00 to 09-JUL-23 21:00:00 (EST-5)
Location: BELFORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Erie Canal Road is washed out with water still flowing over the road.

Flash Flood in LEWIS, NEW YORK
From 09-JUL-23 18:30:00 to 09-JUL-23 21:00:00 (EST-5)
Location: BELFORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Effely Falls Road closed due to water flowing over it.

Heavy Rain in ONTARIO, NEW YORK
From 09-JUL-23 19:00:00 to 09-JUL-23 19:55:00 (EST-5)
Location: CANANDAIGUA FLD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Rainfall was measured this afternoon at the Canandaigua Airport.

Flash Flood in LEWIS, NEW YORK
From 09-JUL-23 19:00:00 to 09-JUL-23 21:00:00 (EST-5)
Location: BEACHES BRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

River Road between State Route 812 and Number Four Road is closed due to flooding.

Flash Flood in LEWIS, NEW YORK
From 09-JUL-23 19:45:00 to 09-JUL-23 21:05:00 (EST-5)
Location: NEW BREMEN DUFLO ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Deveines Road is closed due to flash flooding.