Alert archive / New York / Flash Flood Warnings in 2025

Flash Flood Warning 9, NWS Buffalo, NY

June 18, 2025Chautauqua County, New York

NWS Buffalo, NY issued this flash flood warning at Jun 18, 2025, 12:41 PM EDT for Chautauqua County, New York. It was in force for 4 hr. 1 report 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, 12:41 PM EDT (16:41 UTC)
Expired: Jun 18, 2025, 4:45 PM EDT
In force: 4 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 16:40 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, 2:40 PM EDT	FLASH FLOOD	4 Ssw Ripley, NY	Water over Irish Road in Ripley.

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, 4.7 hours before the alert went out and 113 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.

774 
WGUS51 KBUF 181641
FFWBUF
NYC013-182045-
/O.NEW.KBUF.FF.W.0009.250618T1641Z-250618T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
1241 PM EDT Wed Jun 18 2025

The National Weather Service in Buffalo has issued a

* Flash Flood Warning for...
  West Central Chautauqua County in western New York...

* Until 445 PM EDT.

* At 1241 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...
  Ripley.

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 4229 7969 4223 7964 4218 7962 4214 7974
      4214 7976 4227 7976 4228 7973

FLASH FLOOD...RADAR INDICATED

$$

Brothers

3 follow-up statements

813 
WGUS71 KBUF 181747
FFSBUF

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

NYC013-182045-
/O.CON.KBUF.FF.W.0009.000000T0000Z-250618T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
147 PM EDT Wed Jun 18 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM EDT THIS 
AFTERNOON FOR WEST CENTRAL CHAUTAUQUA COUNTY...

At 147 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1.5 and 2.5 inches of rain have 
fallen. Additional rainfall amounts of 1 to 2 inches 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...
  Ripley.

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 4229 7969 4223 7964 4218 7962 4214 7974
      4214 7976 4227 7976 4228 7973

FLASH FLOOD...RADAR INDICATED

$$

Brothers

266 
WGUS71 KBUF 181914
FFSBUF

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

NYC013-182045-
/O.CON.KBUF.FF.W.0009.000000T0000Z-250618T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
314 PM EDT Wed Jun 18 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM EDT THIS 
AFTERNOON FOR WEST CENTRAL CHAUTAUQUA COUNTY...

At 314 PM EDT, local law enforcement reported water over roads south 
of Ripley and washing out portions of Irish Road due to heavy 
rainfall from earlier thunderstorms. Between 2 and 3 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...Law enforcement 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...
  Ripley.

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 4229 7969 4223 7964 4218 7962 4214 7974
      4214 7976 4227 7976 4228 7973

FLASH FLOOD...OBSERVED

$$

Brothers

768 
WGUS71 KBUF 182039
FFSBUF

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

NYC013-182049-
/O.EXP.KBUF.FF.W.0009.000000T0000Z-250618T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
439 PM EDT Wed Jun 18 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 445 PM EDT THIS AFTERNOON FOR 
WEST CENTRAL CHAUTAUQUA COUNTY...

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

&&

LAT...LON 4229 7969 4223 7964 4218 7962 4214 7974
      4214 7976 4227 7976 4228 7973

$$

Brothers

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 12:23 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Erie	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.