Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Buffalo, NY

July 14, 2021Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 14, 2021, 4:07 AM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 3 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: Jul 14, 2021, 4:07 AM EDT (08:07 UTC)
Expired: Jul 14, 2021, 7:15 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 65 km from the middle of the area, began a volume at 08:10 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 14, 4:46 AM EDT	FLASH FLOOD	4 Ne Dunkirk, NY	ROUTE 5 CLOSED IN BOTH DIRECTIONS FROM HARRINGTON ROAD TO CENTER ROAD IN THE TOWN OF SHERIDAN BECAUSE OF FLOODING.
Jul 14, 7:04 AM EDT	FLASH FLOOD	1 Ene Silver Creek, NY	ROAD CLOSED DUE TO FLOODING.

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, 8.1 hours before the alert went out and 65 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -60 m²/s²
0-3 km storm-relative helicity: -49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

660 
WGUS51 KBUF 140807
FFWBUF
NYC009-013-029-141115-
/O.NEW.KBUF.FF.W.0010.210714T0807Z-210714T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Buffalo NY
407 AM EDT Wed Jul 14 2021

The National Weather Service in Buffalo has issued a

* Flash Flood Warning for...
  Northwestern Cattaraugus County in western New York...
  Northeastern Chautauqua County in western New York...
  Southwestern Erie County in western New York...

* Until 715 AM EDT.

* At 407 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. 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...
  Dunkirk, Fredonia, Evans, Silver Creek, Angola, North Collins, 
  Evangola State Park, Angola on the Lake, SUNY Fredonia, Lake Erie 
  State Park, Collins, Sheridan, Forestville, Perrysburg, Farnham, 
  Silver Creek Reservoir, Versailles and Langford.

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.

&&

LAT...LON 4242 7945 4245 7949 4247 7948 4258 7926
      4260 7918 4262 7917 4267 7908 4257 7868
      4246 7902 4241 7940 4241 7943

FLASH FLOOD...RADAR INDICATED

$$

TMA

2 follow-up statements

957 
WGUS71 KBUF 140926
FFSBUF

Flash Flood Statement
National Weather Service Buffalo NY
526 AM EDT Wed Jul 14 2021

NYC009-013-029-141115-
/O.CON.KBUF.FF.W.0010.000000T0000Z-210714T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-Chautauqua NY-Erie NY-
526 AM EDT Wed Jul 14 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 AM EDT THIS 
MORNING FOR NORTHWESTERN CATTARAUGUS, NORTHEASTERN CHAUTAUQUA AND 
SOUTHWESTERN ERIE COUNTIES...

At 526 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1.5 and 2.5 inches of rain have 
fallen. Flash flooding is already occurring.

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...
Dunkirk, Fredonia, Evans, Silver Creek, Angola, North Collins, 
Evangola State Park, Angola on the Lake, SUNY Fredonia, Lake Erie 
State Park, Collins, Sheridan, Forestville, Perrysburg, Farnham, 
Silver Creek Reservoir, Versailles and Langford.

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.

&&

LAT...LON 4242 7945 4245 7949 4247 7948 4258 7926
      4260 7918 4262 7917 4267 7908 4257 7868
      4246 7902 4241 7940 4241 7943

FLASH FLOOD...RADAR INDICATED

$$

TMA

039 
WGUS71 KBUF 141117
FFSBUF

Flash Flood Statement
National Weather Service Buffalo NY
717 AM EDT Wed Jul 14 2021

NYC009-013-029-141127-
/O.EXP.KBUF.FF.W.0010.000000T0000Z-210714T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cattaraugus NY-Chautauqua NY-Erie NY-
717 AM EDT Wed Jul 14 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN CATTARAUGUS, 
NORTHEASTERN CHAUTAUQUA AND SOUTHWESTERN ERIE COUNTIES...

The heavy rain has ended but areal flooding remains. Significant 
flash flooding is no longer expected to pose a threat. Please 
continue to heed remaining road closures. An areal flood warning is 
in effect over the area through 1015 AM EDT.

LAT...LON 4242 7945 4245 7949 4247 7948 4258 7926
      4260 7918 4262 7917 4267 7908 4257 7868
      4246 7902 4241 7940 4241 7943

$$

JLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:00 PM EDT	Special Marine Warning	BUF		45 min
Jul 13, 8:04 PM EDT	Areal Flood Warning	BUF	Monroe	3 hr
Jul 13, 8:04 PM EDT	Special Weather Statement	BUF	Jefferson	41 min
Jul 13, 8:16 PM EDT	Special Weather Statement	BUF	Ontario, Wayne	44 min
Jul 13, 8:28 PM EDT	Special Marine Warning	BUF		2 hr
Jul 13, 8:35 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	55 min
Jul 13, 9:03 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	27 min
Jul 13, 9:25 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Lewis, Oswego	65 min
Jul 13, 9:38 PM EDT	Special Marine Warning	BUF		82 min
Jul 13, 10:17 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	73 min
Jul 14, 5:45 AM EDT	Special Weather Statement	BUF	Wyoming	60 min
Jul 14, 7:15 AM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	3 hr
Jul 14, 2:16 PM EDT	Special Weather Statement	BUF	Niagara	59 min
Jul 14, 3:26 PM EDT	Special Weather Statement	BUF	Genesee	49 min
Jul 14, 5:03 PM EDT	Special Weather Statement	BUF	Ontario	57 min

Nearby

Flash Flood Warnings in New York, 2021 Every flash flood warning in 2021

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.