Alert archive / New York / Flash Flood Warnings in 2026

Flash Flood Warning 9, NWS Buffalo, NY

July 28, 2026Cattaraugus County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 28, 2026, 2:23 AM EDT for Cattaraugus County, New York. It was in force for 3 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: Jul 28, 2026, 2:23 AM EDT (06:23 UTC)
Expired: Jul 28, 2026, 5:30 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 101 km from the middle of the area, began a volume at 06:27 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
Jul 28, 3:00 AM EDT	FLASH FLOOD	1 Wnw Allegany, NY	NY Route 417 flooded on the west side of Allegany. Location approximated. The flood waters had receded by 5 AM EDT on July 28th.

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 00:00Z, 6.4 hours before the alert went out and 99 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: 1867 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

465 
WGUS51 KBUF 280623
FFWBUF
NYC009-280930-
/O.NEW.KBUF.FF.W.0009.260728T0623Z-260728T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
223 AM EDT Tue Jul 28 2026

The National Weather Service in Buffalo has issued a

* Flash Flood Warning for...
  Southeastern Cattaraugus County in western New York...

* Until 530 AM EDT.

* At 223 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 0.5 to 1.5 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...
  Olean, Allegany State Park, Allegany, St. Bonaventure, Weston 
  Mills, Knapp Creek, Rock City Park, Vandalia and Limestone.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

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 4212 7855 4209 7839 4200 7837 4200 7851
      4200 7855 4200 7860 4200 7866 4210 7866

FLASH FLOOD...RADAR INDICATED

$$

Jaszka

1 follow-up statement

947 
WGUS71 KBUF 280921
FFSBUF

Flash Flood Statement
National Weather Service Buffalo NY
521 AM EDT Tue Jul 28 2026

NYC009-280931-
/O.EXP.KBUF.FF.W.0009.000000T0000Z-260728T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-
521 AM EDT Tue Jul 28 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 530 AM EDT EARLY THIS MORNING 
FOR SOUTHEASTERN CATTARAUGUS COUNTY...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed any remaining road closures.

&&

LAT...LON 4212 7855 4209 7839 4200 7837 4200 7851
      4200 7855 4200 7860 4200 7866 4210 7866

$$

Jaszka

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:20 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	55 min
Jul 28, 1:35 AM EDT	Special Marine Warning	BUF		85 min
Jul 28, 2:26 AM EDT	Flash Flood Warning	BUF	Niagara	4 hr
Jul 28, 4:03 AM EDT	Small Craft Advisory	BUF		24 hr
Jul 28, 4:04 AM EDT	Beach Hazards Statement	BUF	Cayuga, Chautauqua, Monroe, Niagara, Orleans, Oswego and 1 more	24 hr
Jul 28, 8:06 AM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus	4 hr
Jul 28, 4:00 PM EDT	Small Craft Advisory	BUF		12 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.