New York, 2025

Flash Flood and Flooding in New York, April 21, 2025

April 21, 2025 · NWS BUF · 8 events in 2 counties and zones

A mid level trough and cold front tracking across the region caused showers and thunderstorms to develop on the afternoon of Monday April 21st. Some of the thunderstorms caused gusty winds and heavy rainfall, with at least one of the storms causing enough heavy rainfall to prompt the need for a Flash Flood Warning.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$15,000
Crop damage
None recorded
Events
8

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS BUF wrote it up.

A mid level trough and cold front tracking across the region caused showers and thunderstorms to develop on the afternoon of Monday April 21st. Some of the thunderstorms caused gusty winds and heavy rainfall, with at least one of the storms causing enough heavy rainfall to prompt the need for a Flash Flood Warning.

The radar

The Buffalo radar (KBUF), 104 km away, was scanning. The volume nearest the first event began at 22:09 UTC.

Open the radar archive at this moment

Event by event

4 thunderstorm wind, 3 flood, 1 flash flood. Local standard time, as filed.

Thunderstorm Wind, Chautauqua

When
April 21, 5:07 PM EST
Where
Chautauqua County, 0.86 mi NW of Stow
Measured
50 kt (58 mph) estimated gust
Property damage
$5,000
Reported by
911 Call Center
Coordinates
42.160, -79.410

Multiple trees downed in the town of Stow.

Thunderstorm Wind, Chautauqua

When
April 21, 5:15 PM EST
Where
Chautauqua County, Lakewood
Measured
50 kt (58 mph) estimated gust
Reported by
Trained Spotter
Coordinates
42.100, -79.320

Tree downed on a house. Multiple wires downed.

Thunderstorm Wind, Chautauqua

When
April 21, 5:15 PM EST
Where
Chautauqua County, 0.51 mi E of Jamestown Arpt
Measured
50 kt (58 mph) estimated gust
Property damage
$5,000
Reported by
911 Call Center
Coordinates
42.150, -79.240

Multiple trees downed on Route 60 near the Jamestown Airport.

Thunderstorm Wind, Chautauqua

When
April 21, 5:18 PM EST
Where
Chautauqua County, 0.86 mi SW of Gerry
Measured
50 kt (58 mph) estimated gust
Property damage
$5,000
Reported by
911 Call Center
Coordinates
42.170, -79.260

Multiple trees downed near the town line between Gerry and Ellicott.

Flood, Erie

When
April 21, 5:30 PM EST to 6:30 PM EST
Where
Erie County, 0.71 mi NE of Falconwood to 0.68 mi NE of Falconwood
Cause
Heavy Rain
Reported by
Public
Coordinates
42.988, -78.921

Flooding on interstate 190 exit 16, at the interchange with interstate 290.

Flood, Erie

When
April 21, 5:30 PM EST to 6:30 PM EST
Where
Erie County, 1.65 mi SW of Willow Ridge Estates to 1.12 mi SE of Tonawanda
Cause
Heavy Rain
Reported by
Public
Coordinates
43.001, -78.819

Several residential roads flooded in the Town of Tonawanda and in the Town of Amherst.

Flood, Chautauqua

When
April 21, 5:33 PM EST to 6:30 PM EST
Where
Chautauqua County, 0.82 mi S of Gerry to 0.96 mi SSW of Gerry
Cause
Heavy Rain
Reported by
911 Call Center
Coordinates
42.168, -79.250

Flooding in the area of Chautauqua County Route 380 and Route 60, with additional flooding along Route 60 toward the Jamestown Airport.

Flash Flood, Chautauqua

When
April 21, 6:05 PM EST to 8:30 PM EST
Where
Chautauqua County, 0.51 mi W of Ellington to 0.8 mi SSW of Ellington
Cause
Heavy Rain
Reported by
Trained Spotter
Coordinates
42.220, -79.110

Multiple roads closed in the Town of Ellington.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in New York in 2025Every state in 2025This day in weather historyWarnings in New York, April 2025

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1257282, 1257283, 1257284, 1257285, 1257286, 1257289, 1257288, 1256975.