Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 40, NWS Buffalo, NY

June 29, 2021Cattaraugus County, Erie County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 29, 2021, 2:49 PM EDT for Cattaraugus County, Erie County, Wyoming County, New York. It was in force for 56 min. 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 29, 2021, 2:49 PM EDT (18:49 UTC)
Expired: Jun 29, 2021, 3:45 PM EDT
In force: 56 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Erie County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 50 km from the middle of the area, began a volume at 18:54 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 29, 3:35 PM EDT	TSTM WND DMG	Fowlerville, NY	DEPARTMENT OF HIGHWAYS CLEANING UP A TREE DOWN ON BOSTON STATE ROAD. DELAYED REPORT FROM JUNE 29.

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, 6.8 hours before the alert went out and 47 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: 627 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

832 
WUUS51 KBUF 291849
SVRBUF
NYC009-029-121-291945-
/O.NEW.KBUF.SV.W.0040.210629T1849Z-210629T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
249 PM EDT Tue Jun 29 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Wyoming County in western New York...
  Northeastern Cattaraugus County in western New York...
  Southeastern Erie County in western New York...

* Until 345 PM EDT..

* At 249 PM EDT, a severe thunderstorm was located near Springville,
  or 15 miles south of Hamburg, moving east at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Springville, Arcade, East Concord, Chaffee, Concord, Yorkshire,
  Holland, Sardinia, Delevan and Sandusky.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4240 7880 4253 7889 4272 7849 4247 7833
TIME...MOT...LOC 1849Z 264DEG 13KT 4250 7877 

HAIL...1.00IN
WIND...60MPH
 
$$

Reynolds

2 follow-up statements

057 
WWUS51 KBUF 291920
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
320 PM EDT Tue Jun 29 2021

NYC009-029-121-291945-
/O.CON.KBUF.SV.W.0040.000000T0000Z-210629T1945Z/
Wyoming NY-Cattaraugus NY-Erie NY-
320 PM EDT Tue Jun 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR SOUTHWESTERN WYOMING...NORTHEASTERN CATTARAUGUS AND SOUTHEASTERN
ERIE COUNTIES...

At 320 PM EDT, a severe thunderstorm was located over Springville, or
17 miles south of East Aurora, moving east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Springville, Arcade, East Concord, Chaffee, Concord, Yorkshire,
Holland, Sardinia, Delevan and Sandusky.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4241 7875 4256 7882 4266 7847 4247 7833
TIME...MOT...LOC 1920Z 264DEG 13KT 4251 7862 

HAIL...1.00IN
WIND...60MPH
 
$$

Reynolds

167 
WWUS51 KBUF 291937
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
337 PM EDT Tue Jun 29 2021

NYC009-029-121-291946-
/O.EXP.KBUF.SV.W.0040.000000T0000Z-210629T1945Z/
Wyoming NY-Cattaraugus NY-Erie NY-
337 PM EDT Tue Jun 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WYOMING...
NORTHEASTERN CATTARAUGUS AND SOUTHEASTERN ERIE COUNTIES WILL EXPIRE
AT 345 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4241 7875 4256 7882 4266 7847 4247 7833
TIME...MOT...LOC 1936Z 264DEG 13KT 4252 7855 

$$

Reynolds

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 2:05 PM EDT	Special Weather Statement	BUF	Erie	40 min
Jun 29, 2:16 PM EDT	Special Weather Statement	BUF	Cayuga	29 min
Jun 29, 3:13 PM EDT	Special Weather Statement	BUF	Livingston, Wyoming	47 min
Jun 29, 3:18 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Wyoming	45 min
Jun 29, 3:45 PM EDT	Special Marine Warning	BUF		60 min
Jun 29, 4:08 PM EDT	Special Weather Statement	BUF	Livingston	67 min
Jun 29, 4:39 PM EDT	Special Marine Warning	BUF		66 min
Jun 29, 4:54 PM EDT	Special Weather Statement	BUF	Erie	51 min
Jun 29, 5:47 PM EDT	Special Weather Statement	BUF	Wyoming	43 min
Jun 29, 6:01 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	29 min
Jun 29, 7:26 PM EDT	Special Weather Statement	BUF	Allegany	34 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every severe thunderstorm 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.