Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Buffalo, NY

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

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 21, 2021, 4:35 PM EDT for Cayuga County, Oswego County, Wayne County, New York. It was in force for 55 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, 4:35 PM EDT (20:35 UTC)
Expired: Jun 21, 2021, 5:30 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cayuga County, NY, Oswego County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 72 km from the middle of the area, began a volume at 20:36 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, 5:15 PM EDT	TSTM WND DMG	1 Ene Sand Ridge, NY	TREES AND WIRES 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, 8.6 hours before the alert went out and 200 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.

065 
WUUS51 KBUF 212035
SVRBUF
NYC011-075-117-212130-
/O.NEW.KBUF.SV.W.0035.210621T2035Z-210621T2130Z/

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

The National Weather Service in Buffalo has issued a

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

* Until 530 PM EDT..

* At 433 PM EDT, severe thunderstorms were located along a line
  extending from near Chimney Bluffs State Park to near Lehigh
  Valley Junction, moving east at 50 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...
  Oswego, Fulton, Fair Haven Beach State Park, Sandy Island Beach
  State Park, Central Square, Weedsport, Cato, Selkirk Shores State
  Park, Mexico Point State Park and Nine Mile Point.

 This includes the following highways...
 Interstate 90 near exit 40.
 Interstate 81 between exits 32 and 33.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7627 4322 7626
      4320 7627 4323 7631 4323 7648 4303 7649
      4302 7672 4336 7680 4357 7638 4356 7628
      4363 7626 4366 7619 4320 7604
TIME...MOT...LOC 2033Z 253DEG 44KT 4332 7693 4300 7678 

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

Zaff

2 follow-up statements

532 
WWUS51 KBUF 212110
SVSBUF

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

NYC117-212119-
/O.CAN.KBUF.SV.W.0035.000000T0000Z-210621T2130Z/
Wayne NY-
510 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WAYNE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

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

LAT...LON 4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4324 7627
      4320 7627 4323 7631 4323 7648 4303 7649
      4303 7670 4316 7671 4341 7659 4357 7638
      4356 7628 4363 7626 4366 7619 4320 7604
TIME...MOT...LOC 2109Z 253DEG 44KT 4345 7636 4313 7621 

$$

NYC011-075-212130-
/O.CON.KBUF.SV.W.0035.000000T0000Z-210621T2130Z/
Cayuga NY-Oswego NY-
510 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR CAYUGA AND WESTERN OSWEGO COUNTIES...

At 509 PM EDT, severe thunderstorms were located along a line
extending from near Nine Mile Point to Liverpool, moving east at 50
mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Oswego, Fulton, Sandy Island Beach State Park, Central Square,
Weedsport, Cato, Selkirk Shores State Park, Mexico Point State Park,
Nine Mile Point and Battle Island State Park.

 This includes the following highways...
 Interstate 90 near exit 40.
 Interstate 81 between exits 32 and 33.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
&&

LAT...LON 4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4324 7627
      4320 7627 4323 7631 4323 7648 4303 7649
      4303 7670 4316 7671 4341 7659 4357 7638
      4356 7628 4363 7626 4366 7619 4320 7604
TIME...MOT...LOC 2109Z 253DEG 44KT 4345 7636 4313 7621 

HAIL...0.75IN
WIND...70MPH
 
$$

Apffel

139 
WWUS51 KBUF 212131
SVSBUF

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

NYC011-075-212141-
/O.EXP.KBUF.SV.W.0035.000000T0000Z-210621T2130Z/
Cayuga NY-Oswego NY-
531 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR CAYUGA AND WESTERN OSWEGO
COUNTIES HAS EXPIRED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been allowed to expire.

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

LAT...LON 4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4324 7627
      4320 7627 4323 7631 4323 7648 4303 7649
      4303 7670 4316 7671 4341 7659 4357 7638
      4356 7628 4363 7626 4366 7619 4320 7604
TIME...MOT...LOC 2131Z 253DEG 44KT 4351 7607 4319 7592 

$$

EAJ

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	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, 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.