Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Buffalo, NY

June 21, 2021Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 21, 2021, 2:18 PM EDT for Erie County, New York. It was in force for 42 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 21, 2021, 2:18 PM EDT (18:18 UTC)
Expired: Jun 21, 2021, 3:00 PM EDT
In force: 42 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Erie County, NY

The radar

The Buffalo radar (KBUF), 27 km from the middle of the area, began a volume at 18:17 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 21, 2:45 PM EDT	TSTM WND DMG	East Aurora, NY	LARGE BRANCHES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 12:31 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.3 hours before the alert went out and 27 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: 9 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

279 
WUUS51 KBUF 211818
SVRBUF
NYC029-211900-
/O.NEW.KBUF.SV.W.0028.210621T1818Z-210621T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
218 PM EDT Mon Jun 21 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Central Erie County in western New York...

* Until 300 PM EDT..

* At 217 PM EDT, severe thunderstorms were located along a line
  extending from near Erie Basin Marina to Angola, moving northeast
  at 60 mph.0

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Buffalo, Cheektowaga, West Seneca, Clarence, Lackawanna, Depew,
  Amherst, Lancaster, Hamburg and East Aurora.

 This includes Interstate 90 between exits 57A and 49.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4274 7905 4276 7898 4280 7892 4284 7893
      4289 7891 4293 7891 4306 7847 4258 7860
      4254 7907 4256 7910 4257 7912
TIME...MOT...LOC 1817Z 239DEG 54KT 4284 7895 4264 7904 

HAIL...0.75IN
WIND...60MPH
 
$$

HSK

2 follow-up statements

259 
WWUS51 KBUF 211846
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
246 PM EDT Mon Jun 21 2021

NYC029-211900-
/O.CON.KBUF.SV.W.0028.000000T0000Z-210621T1900Z/
Erie NY-
246 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR EASTERN ERIE COUNTY...

At 246 PM EDT, severe thunderstorms were located along a line
extending from near Akron to Marilla, moving northeast at 60 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
West Seneca, Clarence, Lancaster, East Aurora, Elma, Boston, Marilla,
Colden, Orchard Park and Akron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4282 7872 4290 7867 4299 7865 4306 7847
      4258 7860 4257 7885
TIME...MOT...LOC 1846Z 239DEG 54KT 4305 7847 4285 7856 

HAIL...0.75IN
WIND...60MPH
 
$$

HSK

368 
WWUS51 KBUF 211851
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
251 PM EDT Mon Jun 21 2021

NYC029-211900-
/O.EXP.KBUF.SV.W.0028.000000T0000Z-210621T1900Z/
Erie NY-
251 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ERIE COUNTY WILL
EXPIRE AT 300 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
western New York.

Remember, a Severe Thunderstorm Warning still remains in effect for 
far eastern Erie county until 330 PM.

LAT...LON 4282 7872 4290 7867 4299 7865 4306 7847
      4258 7860 4257 7885
TIME...MOT...LOC 1850Z 239DEG 54KT 4307 7842 4287 7851 

$$

HSK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 9:04 PM EDT	Special Weather Statement	BUF	Livingston	26 min
Jun 20, 9:18 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Wyoming	42 min
Jun 20, 9:55 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	39 min
Jun 20, 11:23 PM EDT	Special Marine Warning	BUF		67 min
Jun 20, 11:23 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	52 min
Jun 21, 12:07 AM EDT	Special Marine Warning	BUF		53 min
Jun 21, 12:17 AM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	43 min
Jun 21, 12:30 AM EDT	Special Marine Warning	BUF		34 min
Jun 21, 1:47 AM EDT	Special Marine Warning	BUF		43 min
Jun 21, 2:14 AM EDT	Special Weather Statement	BUF	Erie	46 min
Jun 21, 2:30 AM EDT	Special Marine Warning	BUF		45 min
Jun 21, 2:54 AM EDT	Special Weather Statement	BUF	Erie, Genesee	51 min
Jun 21, 3:20 AM EDT	Special Marine Warning	BUF		55 min
Jun 21, 3:36 AM EDT	Special Weather Statement	BUF	Monroe, Orleans	39 min
Jun 21, 3:42 AM EDT	Special Weather Statement	BUF	Chautauqua	63 min
Jun 21, 3:50 AM EDT	Special Marine Warning	BUF		55 min
Jun 21, 4:12 AM EDT	Special Weather Statement	BUF	Chautauqua	48 min
Jun 21, 4:19 AM EDT	Special Marine Warning	BUF		26 min
Jun 21, 4:28 AM EDT	Beach Hazards Statement	BUF	Cayuga, Chautauqua, Erie, Jefferson, Monroe, Niagara and 3 more	42 hr
Jun 21, 4:31 AM EDT	Special Weather Statement	BUF	Cattaraugus, Erie, Genesee, Wyoming	44 min
Jun 21, 4:48 AM EDT	Special Marine Warning	BUF		42 min
Jun 21, 5:15 AM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Livingston, Wyoming	75 min
Jun 21, 5:48 AM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	42 min
Jun 21, 6:25 AM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	50 min
Jun 21, 6:33 AM EDT	Special Marine Warning	BUF		57 min
Jun 21, 6:55 AM EDT	Special Weather Statement	BUF	Oswego	50 min
Jun 21, 7:15 AM EDT	Special Marine Warning	BUF		30 min
Jun 21, 7:20 AM EDT	Special Weather Statement	BUF	Jefferson, Lewis, Oswego	55 min
Jun 21, 7:25 AM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	50 min
Jun 21, 1:31 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	43 min
Jun 21, 1:34 PM EDT	Special Marine Warning	BUF		56 min
Jun 21, 1:53 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	67 min
Jun 21, 2:01 PM EDT	Special Marine Warning	BUF		44 min
Jun 21, 2:18 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	42 min
Jun 21, 2:44 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	46 min
Jun 21, 3:07 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	53 min
Jun 21, 3:18 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Wyoming	57 min
Jun 21, 3:55 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	50 min
Jun 21, 3:58 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	47 min
Jun 21, 4:25 PM EDT	Special Marine Warning	BUF		77 min
Jun 21, 4:35 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	55 min
Jun 21, 5:02 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	58 min
Jun 21, 5:26 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	64 min
Jun 21, 6:21 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	26 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.