Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 13, NWS Buffalo, NY

June 9, 2021Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 9, 2021, 5:13 PM EDT for Chautauqua County, New York. It was in force for 47 min. 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: Jun 9, 2021, 5:13 PM EDT (21:13 UTC)
Expired: Jun 9, 2021, 6:00 PM EDT
In force: 47 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 107 km from the middle of the area, began a volume at 21:16 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 9, 5:25 PM EDT	TSTM WND DMG	2 Se Jamestown West, NY	TREES DOWN ON GARFIELD ROAD.
Jun 9, 5:30 PM EDT	TSTM WND DMG	4 Sse Jamestown West, NY	TREES DOWN ON POWER LINES EAST OF BUSTI BETWEEN FOREST AVENUE AND SOUTH MAIN STREET EXTENSION.

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, 9.2 hours before the alert went out and 106 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: 68 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

251 
WUUS51 KBUF 092113
SVRBUF
NYC013-092200-
/O.NEW.KBUF.SV.W.0013.210609T2113Z-210609T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
513 PM EDT Wed Jun 9 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Chautauqua County in western New York...

* Until 600 PM EDT..

* At 511 PM EDT, a severe thunderstorm was located over Jamestown,
  moving west 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...
  Jamestown, Lakewood, Falconer, Long Point State Park, Jamestown
  West, Frewsburg, Busti, Gerry, Celoron and Bemus Point.

 This includes Interstate 86 between exits 8 and 13.

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

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

&&

LAT...LON 4200 7937 4218 7943 4221 7913 4203 7908
      4200 7916
TIME...MOT...LOC 2111Z 075DEG 15KT 4210 7923 

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

JLA

2 follow-up statements

163 
WWUS51 KBUF 092133
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
533 PM EDT Wed Jun 9 2021

NYC013-092200-
/O.CON.KBUF.SV.W.0013.000000T0000Z-210609T2200Z/
Chautauqua NY-
533 PM EDT Wed Jun 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL CHAUTAUQUA COUNTY...

At 533 PM EDT, a severe thunderstorm was located over Long Point
State Park, or 7 miles northwest of Jamestown, moving west at 20 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Jamestown, Lakewood, Jamestown West, Long Point State Park, Busti,
Celoron, Bemus Point, Ellery Center, Ashville and Stow.

 This includes Interstate 86 between exits 8 and 11.
 
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 4200 7937 4218 7943 4220 7926 4205 7923
      4200 7919
TIME...MOT...LOC 2133Z 107DEG 17KT 4215 7937 

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

JLA

545 
WWUS51 KBUF 092158
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
558 PM EDT Wed Jun 9 2021

NYC013-092207-
/O.EXP.KBUF.SV.W.0013.000000T0000Z-210609T2200Z/
Chautauqua NY-
558 PM EDT Wed Jun 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHAUTAUQUA
COUNTY WILL EXPIRE AT 600 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will 
be allowed to expire.  However heavy rain is still possible with 
this storm.

LAT...LON 4200 7937 4218 7943 4220 7926 4205 7923
      4200 7919
TIME...MOT...LOC 2157Z 075DEG 15KT 4213 7949 

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 1:28 PM EDT	Special Weather Statement	BUF	Cattaraugus	92 min
Jun 9, 2:33 PM EDT	Special Weather Statement	BUF	Allegany	27 min
Jun 9, 2:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	25 min
Jun 9, 3:02 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	43 min
Jun 9, 3:09 PM EDT	Special Weather Statement	BUF	Cattaraugus	66 min
Jun 9, 3:18 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus	57 min
Jun 9, 3:32 PM EDT	Flash Flood Warning	BUF	Allegany	3 hr
Jun 9, 4:00 PM EDT	Flash Flood Warning	BUF	Cattaraugus	3 hr
Jun 9, 4:14 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	61 min
Jun 9, 4:35 PM EDT	Special Weather Statement	BUF	Chautauqua	40 min
Jun 9, 5:04 PM EDT	Flash Flood Warning	BUF	Chautauqua	3 hr
Jun 9, 5:41 PM EDT	Special Weather Statement	BUF	Cattaraugus	64 min
Jun 9, 5:56 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	33 min
Jun 9, 6:22 PM EDT	Flash Flood Warning	BUF	Cattaraugus	116 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.