Alert archive / New York / Flash Flood Warnings in 2026

Flash Flood Warning 14, NWS Buffalo, NY

August 23, 2026Chautauqua County, New York

NWS Buffalo, NY issued this flash flood warning at Aug 23, 2026, 7:03 AM EDT for Chautauqua County, New York. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 23, 2026, 7:03 AM EDT (11:03 UTC)
Expired: Aug 23, 2026, 12:30 PM EDT
In force: 5 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 87 km from the middle of the area, began a volume at 11:03 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 11.1 hours before the alert went out and 88 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: 558 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

061 
WGUS51 KBUF 231103
FFWBUF
NYC013-231500-
/O.NEW.KBUF.FF.W.0014.260823T1103Z-260823T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
703 AM EDT Sun Aug 23 2026

The National Weather Service in Buffalo has issued a

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

* Until 1100 AM EDT.

* At 703 AM 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 0.5 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 indicated.

  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...
  Dunkirk, Fredonia, Westfield, Silver Creek, Mayville, Lake Erie
  State Park, SUNY Fredonia, Chautauqua Institution, Findley Lake,
  Chautauqua, Portland, Sheridan, Ripley, Stockton, Brocton, Mina,
  Arkwright, Sherman, Forestville and Cassadaga.

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 7975 4242 7954 4244 7949 4246 7948
      4249 7942 4259 7924 4260 7918 4251 7907
      4243 7908 4235 7919 4218 7949 4206 7976
      4227 7976 4228 7973

FLASH FLOOD...RADAR INDICATED

$$

Thomas

1 follow-up statement

645 
WGUS51 KBUF 231304
FFWBUF
NYC013-231630-
/O.EXT.KBUF.FF.W.0014.000000T0000Z-260823T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
904 AM EDT Sun Aug 23 2026

The National Weather Service in Buffalo has extended the

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

* Until 1230 PM EDT.

* At 904 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 3 and 5 inches of rain
  have fallen. Additional rainfall amounts of 1.5 to 3 inches are
  possible in the warned area. Flash flooding is ongoing or expected
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Radar indicated.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Dunkirk, Fredonia, Westfield, Silver Creek, Mayville, Lake Erie
  State Park, SUNY Fredonia, Chautauqua Institution, Findley Lake,
  Chautauqua, Portland, Sheridan, Ripley, Stockton, Brocton, Mina,
  Arkwright, Sherman, Forestville and Cassadaga.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

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 7975 4242 7954 4244 7949 4246 7948
      4249 7942 4259 7924 4260 7918 4251 7907
      4243 7908 4235 7919 4218 7949 4206 7976
      4227 7976 4228 7973

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

SGK

The office that day

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

Issued	Product	Office	Lasted
Aug 23, 2:54 PM EDT	Special Marine Warning	BUF	66 min
Aug 23, 4:26 PM EDT	Special Marine Warning	BUF	34 min
Aug 23, 7:55 PM EDT	Special Marine Warning	BUF	56 min

Nearby

Flash Flood Warnings in New York, 2026 Every flash flood warning in 2026

Sources

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