Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 24, NWS Buffalo, NY

June 21, 2021Cayuga County, Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 21, 2021, 6:25 AM EDT for Cayuga County, Ontario County, Wayne County, New York. It was in force for 50 min. 4 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 21, 2021, 6:25 AM EDT (10:25 UTC)
Expired: Jun 21, 2021, 7:15 AM EDT
In force: 50 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cayuga County, NY, Ontario County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 121 km from the middle of the area, began a volume at 10:28 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, 6:25 AM EDT	TSTM WND DMG	4 Se Canandaigua, NY	REPORTS OF 2 DIFFERENT AREAS OF DOWNED TREES AND POWERLINES AROUND THE INTERSECTION OF TURNER RD AND MIDDLE ROAD IN GORHAM.
Jun 21, 6:27 AM EDT	TSTM WND DMG	1 Nw Marion, NY	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 NW MARION. TREES DOWN ON BUFFALO ST AND RT 21.
Jun 21, 6:29 AM EDT	TSTM WND DMG	2 Nne Marion, NY	TREES DOWN AT FARNSWORTH RD AND WITHERDEN AND TREES DOWN AT BUFFALO ST AND RT 21.
Jun 21, 6:35 AM EDT	TSTM WND DMG	2 Ene Newark, NY	TREES DOWN ON BRUM RD.

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, 10.4 hours before the alert went out and 151 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: 315 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1222 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

758 
WUUS51 KBUF 211025
SVRBUF
NYC011-069-117-211115-
/O.NEW.KBUF.SV.W.0024.210621T1025Z-210621T1115Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Wayne County in western New York...
  Cayuga County in central New York...
  Northeastern Ontario County in western New York...

* Until 715 AM EDT..

* At 624 AM EDT, a severe thunderstorm was located near Clifton
  Springs, or near Canandaigua, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Geneva, Canandaigua, Newark, Williamson, Marion, Lyons, Palmyra,
  Clifton Springs, Clyde and Phelps.

 This includes Interstate 90 between exits 43 and 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4326 7728 4331 7664 4328 7660 4325 7660
      4326 7657 4323 7653 4303 7649 4301 7696
      4287 7696 4286 7698 4276 7697 4276 7728
TIME...MOT...LOC 1024Z 242DEG 48KT 4295 7721 

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

Apffel

2 follow-up statements

235 
WWUS51 KBUF 211052
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
652 AM EDT Mon Jun 21 2021

NYC069-211102-
/O.CAN.KBUF.SV.W.0024.000000T0000Z-210621T1115Z/
Ontario NY-
652 AM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ONTARIO COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4302 7693 4328 7697 4331 7664 4328 7660
      4325 7660 4326 7657 4323 7653 4303 7649
TIME...MOT...LOC 1052Z 242DEG 48KT 4313 7675 

$$

NYC011-117-211115-
/O.CON.KBUF.SV.W.0024.000000T0000Z-210621T1115Z/
Wayne NY-Cayuga NY-
652 AM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM EDT
FOR EASTERN WAYNE AND CAYUGA COUNTIES...

At 652 AM EDT, a severe thunderstorm was located near Clyde, or 15
miles south of Fair Haven Beach State Park, moving northeast at 55
mph.

HAZARD...60 mph wind gusts.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Clyde, Weedsport, Cato, Chimney Bluffs State Park, Rose, Ira, Huron,
Conquest, Savannah and Wolcott.

 This includes Interstate 90 near exit 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4302 7693 4328 7697 4331 7664 4328 7660
      4325 7660 4326 7657 4323 7653 4303 7649
TIME...MOT...LOC 1052Z 242DEG 48KT 4313 7675 

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

Apffel

294 
WWUS51 KBUF 211111
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
711 AM EDT Mon Jun 21 2021

NYC011-117-211120-
/O.EXP.KBUF.SV.W.0024.000000T0000Z-210621T1115Z/
Wayne NY-Cayuga NY-
711 AM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WAYNE AND CAYUGA
COUNTIES WILL EXPIRE AT 715 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4302 7693 4328 7697 4331 7664 4328 7660
      4325 7660 4326 7657 4323 7653 4303 7649
TIME...MOT...LOC 1110Z 242DEG 48KT 4323 7649 

$$

Apffel

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, 6:33 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	Erie	42 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.