Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Buffalo, NY

June 21, 2021Jefferson County, Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 21, 2021, 5:02 PM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 58 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 21, 2021, 5:02 PM EDT (21:02 UTC)
Expired
Jun 21, 2021, 6:00 PM EDT
In force
58 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Jefferson County, NY, Lewis County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 49 km from the middle of the area, began a volume at 21:06 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

TimeReportWhereRemark
Jun 21, 5:25 PM EDTTSTM WND DMG6 N Cleveland, NYTREES AND WIRES DOWN.
Jun 21, 5:30 PM EDTTSTM WND DMG3 Nw Constantia, NYTREES 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.

IssuedProductOfficeLasted
Jun 21, 12:31 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.0 hours before the alert went out and 180 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2021-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 524 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2021-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
524 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
990 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

386 
WUUS51 KBUF 212102
SVRBUF
NYC045-049-075-212200-
/O.NEW.KBUF.SV.W.0036.210621T2102Z-210621T2200Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  South central Jefferson County in central New York...
  Southwestern Lewis County in central New York...
  Eastern Oswego County in central New York...

* Until 600 PM EDT..

* At 501 PM EDT, severe thunderstorms were located along a line
  extending from near Nine Mile Point to Baldwinsville, moving east
  at 55 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...
  Pulaski, Redfield, Barnes Corners, Richland, Constantia, West
  Monroe, Williamstown, Orwell, Lorraine and Sandy Creek.

 This includes Interstate 81 between exits 33 and 39.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms have a history of 
producing damage. SEEK SHELTER NOW inside a sturdy structure and 
stay away from windows! 

&&

LAT...LON 4342 7554 4348 7581 4333 7589 4332 7586
      4315 7588 4316 7592 4317 7593 4317 7595
      4318 7599 4318 7600 4320 7604 4320 7606
      4368 7619 4390 7575 4345 7548
TIME...MOT...LOC 2101Z 253DEG 47KT 4356 7644 4317 7634 

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

Zaff
2 follow-up statements
227 
WWUS51 KBUF 212132
SVSBUF

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

NYC045-049-075-212200-
/O.CON.KBUF.SV.W.0036.000000T0000Z-210621T2200Z/
Jefferson NY-Lewis NY-Oswego NY-
532 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL JEFFERSON...SOUTHWESTERN LEWIS AND EASTERN OSWEGO
COUNTIES...

At 532 PM EDT, severe thunderstorms were located along a line
extending from 10 miles southeast of Adams to near Camden, moving
east at 55 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...
Pulaski, Redfield, Barnes Corners, Richland, Constantia, West Monroe,
Williamstown, Orwell, Lorraine and Sandy Creek.

 This includes Interstate 81 between exits 33 and 39.
 
LAT...LON 4342 7554 4348 7581 4333 7589 4332 7586
      4315 7588 4316 7592 4317 7593 4317 7595
      4318 7599 4318 7600 4320 7604 4320 7606
      4368 7619 4390 7575 4345 7548
TIME...MOT...LOC 2132Z 253DEG 47KT 4367 7592 4328 7582 

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

Zaff
154 
WWUS51 KBUF 212159
SVSBUF

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

NYC045-049-075-212209-
/O.EXP.KBUF.SV.W.0036.000000T0000Z-210621T2200Z/
Jefferson NY-Lewis NY-Oswego NY-
559 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JEFFERSON...
SOUTHWESTERN LEWIS AND EASTERN OSWEGO COUNTIES WILL EXPIRE AT 600 PM
EDT...
    
The storms which prompted the warning have moved out of the area or 
been replaced by another warning. Therefore, the warning will be 
allowed to expire.

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

LAT...LON 4342 7554 4348 7581 4333 7589 4332 7586
      4315 7588 4316 7592 4317 7593 4317 7595
      4318 7599 4318 7600 4320 7604 4320 7606
      4368 7619 4390 7575 4345 7548
TIME...MOT...LOC 2159Z 253DEG 47KT 4376 7550 4337 7540 

$$

Apffel

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 9:04 PM EDTSpecial Weather StatementBUFLivingston26 min
Jun 20, 9:18 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Wyoming42 min
Jun 20, 9:55 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario, Wayne39 min
Jun 20, 11:23 PM EDTSpecial Marine WarningBUF67 min
Jun 20, 11:23 PM EDTSevere Thunderstorm WarningBUFChautauqua52 min
Jun 21, 12:07 AM EDTSpecial Marine WarningBUF53 min
Jun 21, 12:17 AM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie43 min
Jun 21, 12:30 AM EDTSpecial Marine WarningBUF34 min
Jun 21, 1:47 AM EDTSpecial Marine WarningBUF43 min
Jun 21, 2:14 AM EDTSpecial Weather StatementBUFErie46 min
Jun 21, 2:30 AM EDTSpecial Marine WarningBUF45 min
Jun 21, 2:54 AM EDTSpecial Weather StatementBUFErie, Genesee51 min
Jun 21, 3:20 AM EDTSpecial Marine WarningBUF55 min
Jun 21, 3:36 AM EDTSpecial Weather StatementBUFMonroe, Orleans39 min
Jun 21, 3:42 AM EDTSpecial Weather StatementBUFChautauqua63 min
Jun 21, 3:50 AM EDTSpecial Marine WarningBUF55 min
Jun 21, 4:12 AM EDTSpecial Weather StatementBUFChautauqua48 min
Jun 21, 4:19 AM EDTSpecial Marine WarningBUF26 min
Jun 21, 4:28 AM EDTBeach Hazards StatementBUFCayuga, Chautauqua, Erie, Jefferson, Monroe, Niagara and 3 more42 hr
Jun 21, 4:31 AM EDTSpecial Weather StatementBUFCattaraugus, Erie, Genesee, Wyoming44 min
Jun 21, 4:48 AM EDTSpecial Marine WarningBUF42 min
Jun 21, 5:15 AM EDTSpecial Weather StatementBUFAllegany, Cattaraugus, Livingston, Wyoming75 min
Jun 21, 5:48 AM EDTSevere Thunderstorm WarningBUFLivingston, Ontario42 min
Jun 21, 6:25 AM EDTSevere Thunderstorm WarningBUFCayuga, Ontario, Wayne50 min
Jun 21, 6:33 AM EDTSpecial Marine WarningBUF57 min
Jun 21, 6:55 AM EDTSpecial Weather StatementBUFOswego50 min
Jun 21, 7:15 AM EDTSpecial Marine WarningBUF30 min
Jun 21, 7:20 AM EDTSpecial Weather StatementBUFJefferson, Lewis, Oswego55 min
Jun 21, 7:25 AM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego50 min
Jun 21, 1:31 PM EDTSevere Thunderstorm WarningBUFJefferson43 min
Jun 21, 1:34 PM EDTSpecial Marine WarningBUF56 min
Jun 21, 1:53 PM EDTSevere Thunderstorm WarningBUFLewis67 min
Jun 21, 2:01 PM EDTSpecial Marine WarningBUF44 min
Jun 21, 2:18 PM EDTSevere Thunderstorm WarningBUFErie42 min
Jun 21, 2:18 PM EDTSevere Thunderstorm WarningBUFLewis42 min
Jun 21, 2:44 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Wyoming46 min
Jun 21, 3:07 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus53 min
Jun 21, 3:18 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Ontario, Wyoming57 min
Jun 21, 3:55 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario50 min
Jun 21, 3:58 PM EDTSevere Thunderstorm WarningBUFMonroe, Ontario, Wayne47 min
Jun 21, 4:25 PM EDTSpecial Marine WarningBUF77 min
Jun 21, 4:35 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego, Wayne55 min
Jun 21, 5:26 PM EDTSevere Thunderstorm WarningBUFLewis64 min
Jun 21, 6:21 PM EDTSevere Thunderstorm WarningBUFLewis26 min

Nearby

Severe Thunderstorm Warnings in New York, 2021Every 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.