Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Buffalo, NY

July 13, 2021Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2021, 5:38 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 13, 2021, 5:38 PM EDT (21:38 UTC)
Expired: Jul 13, 2021, 6:30 PM EDT
In force: 52 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Buffalo radar (KBUF), 66 km from the middle of the area, began a volume at 21:37 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 13, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.6 hours before the alert went out and 66 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: 610 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

475 
WUUS51 KBUF 132138
SVRBUF
NYC009-013-029-132230-
/O.NEW.KBUF.SV.W.0064.210713T2138Z-210713T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
538 PM EDT Tue Jul 13 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Western Cattaraugus County in western New York...
  Southwestern Erie County in western New York...
  Eastern Chautauqua County in western New York...

* Until 630 PM EDT..

* At 537 PM EDT, severe thunderstorms were located along a line
  extending from near Dunkirk to near Falconer to near Russell,
  moving northeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Dunkirk, Fredonia, Hamburg, Salamanca, Allegany State Park, Evans,
  Eden, Gowanda, Silver Creek and Falconer.

 This includes the following highways...
 Interstate 90 between exits 59 and 57A.
 Interstate 86 between exits 14 and 18, and near exit 20.	

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7914 4213 7919 4249 7945 4253 7939
      4260 7919 4272 7909 4276 7898 4280 7892
      4260 7874 4223 7868 4200 7888
TIME...MOT...LOC 2137Z 215DEG 30KT 4250 7937 4219 7915 4199 7912 

HAIL...<.75IN
WIND...60MPH
 
$$

Welch

2 follow-up statements

594 
WWUS51 KBUF 132226
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
626 PM EDT Tue Jul 13 2021

NYC013-029-132233-
/O.CAN.KBUF.SV.W.0064.000000T0000Z-210713T2230Z/
Erie NY-Chautauqua NY-
626 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ERIE AND EASTERN
CHAUTAUQUA COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened and 
moved out of the warned area. Therefore, the warning has been 
cancelled. A Severe Thunderstorm Warning is still in effect for 
portions of northwestern Erie County

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
western New York.

LAT...LON 4221 7884 4233 7870 4223 7868 4200 7888
TIME...MOT...LOC 2223Z 225DEG 39KT 4222 7872 

$$

NYC009-132230-
/O.CON.KBUF.SV.W.0064.000000T0000Z-210713T2230Z/
Cattaraugus NY-
626 PM EDT Tue Jul 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTH CENTRAL CATTARAUGUS COUNTY...

At 623 PM EDT, a severe thunderstorm was located near Salamanca,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Salamanca, Allegany State Park and Little Valley. 

 This includes Interstate 86 exit 18 and near exit 20.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4221 7884 4233 7870 4223 7868 4200 7888
TIME...MOT...LOC 2223Z 225DEG 39KT 4222 7872 

HAIL...<.75IN
WIND...60MPH
 
$$

Welch

100 
WWUS51 KBUF 132234
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
634 PM EDT Tue Jul 13 2021

NYC009-132244-
/O.EXP.KBUF.SV.W.0064.000000T0000Z-210713T2230Z/
Cattaraugus NY-
634 PM EDT Tue Jul 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CATTARAUGUS
COUNTY HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
western New York.

LAT...LON 4221 7884 4233 7870 4223 7868 4200 7888
TIME...MOT...LOC 2234Z 215DEG 30KT 4228 7867 

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:40 AM EDT	Special Weather Statement	BUF	Lewis	50 min
Jul 13, 1:29 PM EDT	Special Weather Statement	BUF	Erie	46 min
Jul 13, 1:56 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 2:45 PM EDT	Special Weather Statement	BUF	Monroe	30 min
Jul 13, 3:40 PM EDT	Special Marine Warning	BUF		50 min
Jul 13, 4:34 PM EDT	Special Marine Warning	BUF		56 min
Jul 13, 4:41 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	64 min
Jul 13, 4:46 PM EDT	Special Weather Statement	BUF	Wayne	44 min
Jul 13, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	55 min
Jul 13, 4:59 PM EDT	Special Marine Warning	BUF		46 min
Jul 13, 5:23 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	45 min
Jul 13, 5:26 PM EDT	Special Marine Warning	BUF		64 min
Jul 13, 5:33 PM EDT	Special Marine Warning	BUF		42 min
Jul 13, 5:41 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	64 min
Jul 13, 5:43 PM EDT	Special Weather Statement	BUF	Monroe	32 min
Jul 13, 5:57 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	63 min
Jul 13, 6:05 PM EDT	Special Marine Warning	BUF		55 min
Jul 13, 6:07 PM EDT	Special Marine Warning	BUF		38 min
Jul 13, 6:08 PM EDT	Special Marine Warning	BUF		52 min
Jul 13, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	53 min
Jul 13, 6:19 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	41 min
Jul 13, 6:46 PM EDT	Special Marine Warning	BUF		89 min
Jul 13, 6:55 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	50 min
Jul 13, 7:02 PM EDT	Special Marine Warning	BUF		58 min
Jul 13, 7:05 PM EDT	Special Weather Statement	BUF	Jefferson	25 min
Jul 13, 7:07 PM EDT	Special Marine Warning	BUF		53 min
Jul 13, 7:15 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wayne	60 min
Jul 13, 7:27 PM EDT	Special Marine Warning	BUF		93 min
Jul 13, 7:41 PM EDT	Special Marine Warning	BUF		94 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.