Alert archive / New York / Flash Flood Warnings in 2025

Flash Flood Warning 8, NWS Buffalo, NY

June 18, 2025Cattaraugus County, Erie County, New York

NWS Buffalo, NY issued this flash flood warning at Jun 18, 2025, 12:23 PM EDT for Cattaraugus County, Erie County, New York. It was in force for 4 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 18, 2025, 12:23 PM EDT (16:23 UTC)
Expired: Jun 18, 2025, 4:30 PM EDT
In force: 4 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Cattaraugus County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 53 km from the middle of the area, began a volume at 16:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 18, 12:30 PM EDT	FLASH FLOOD	1 N Gowanda, NY	Water flowing down Sand Hill over US Route 62 in Gowanda.
Jun 18, 1:00 PM EDT	FLASH FLOOD	Gowanda, NY	Report of numerous streets in Gowanda with flooding, including Route 39.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.4 hours before the alert went out and 52 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 823 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

068 
WGUS51 KBUF 181623
FFWBUF
NYC009-029-182030-
/O.NEW.KBUF.FF.W.0008.250618T1623Z-250618T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
1223 PM EDT Wed Jun 18 2025

The National Weather Service in Buffalo has issued a

* Flash Flood Warning for...
  Northwestern Cattaraugus County in western New York...
  South Central Erie County in western New York...

* Until 430 PM EDT.

* At 1223 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 1.5 inches of 
  rain have fallen. Additional rainfall amounts up to 1 inch are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Gowanda, Collins, Dayton, Perrysburg and Versailles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4247 7906 4254 7900 4256 7893 4259 7885
      4255 7877 4248 7875 4243 7880 4240 7897
      4239 7904

FLASH FLOOD...RADAR INDICATED

$$

Brothers

2 follow-up statements

380 
WGUS71 KBUF 181745
FFSBUF

Flash Flood Statement
National Weather Service Buffalo NY
145 PM EDT Wed Jun 18 2025

NYC009-029-182030-
/O.CON.KBUF.FF.W.0008.000000T0000Z-250618T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-Erie NY-
145 PM EDT Wed Jun 18 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM EDT THIS 
AFTERNOON FOR NORTHWESTERN CATTARAUGUS AND SOUTH CENTRAL ERIE 
COUNTIES...

At 145 PM EDT, emergency management reported thunderstorms producing 
heavy rain across the warned area with water flowing over numerous 
streets near Gowanda. Between 1.5 and 2.5 inches of rain have 
fallen. Additional rainfall amounts up to 0.25 inches are possible 
in the warned area. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Gowanda, Collins, Dayton, Perrysburg and Versailles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4247 7906 4254 7900 4256 7893 4259 7885
      4255 7877 4248 7875 4243 7880 4240 7897
      4239 7904

FLASH FLOOD...OBSERVED

$$

Brothers

672 
WGUS71 KBUF 182022
FFSBUF

Flash Flood Statement
National Weather Service Buffalo NY
422 PM EDT Wed Jun 18 2025

NYC009-029-182032-
/O.EXP.KBUF.FF.W.0008.000000T0000Z-250618T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-Erie NY-
422 PM EDT Wed Jun 18 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 430 PM EDT THIS AFTERNOON FOR 
NORTHWESTERN CATTARAUGUS AND SOUTH CENTRAL ERIE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4247 7906 4254 7900 4256 7893 4259 7885
      4255 7877 4248 7875 4243 7880 4240 7897
      4239 7904

$$

Brothers

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 12:41 PM EDT	Flash Flood Warning	BUF	Chautauqua	4 hr
Jun 18, 2:17 PM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario	4 hr
Jun 18, 2:46 PM EDT	Flash Flood Warning	BUF	Allegany, Livingston	95 min
Jun 18, 3:09 PM EDT	Flash Flood Warning	BUF	Monroe, Wayne	4 hr
Jun 18, 3:18 PM EDT	Flash Flood Warning Considerable damage threat	BUF	Ontario	3 hr
Jun 18, 6:13 PM EDT	Areal Flood Warning	BUF	Livingston, Monroe, Ontario	5 hr
Jun 18, 7:14 PM EDT	Areal Flood Warning	BUF	Monroe	3 hr

Nearby

Flash Flood Warnings in New York, 2025 Every flash flood warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.