Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 13, NWS Burlington, VT

June 21, 20214 counties in Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jun 21, 2021, 4:40 PM EDT for 4 counties in Vermont; Essex County, New York. It was in force for 65 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, 4:40 PM EDT (20:40 UTC)
Expired: Jun 21, 2021, 5:45 PM EDT
In force: 65 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Essex County, NY, Addison County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 86 km from the middle of the area, began a volume at 20:40 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, 5:20 PM EDT	HAIL 1.25	Bristol, VT	PUBLIC REPORTED HAIL OF AT LEAST QUARTER SIZE.

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, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.7 hours before the alert went out and 124 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: 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.

924 
WUUS51 KBTV 212040
SVRBTV
NYC031-VTC001-021-023-027-212145-
/O.NEW.KBTV.SV.W.0013.210621T2040Z-210621T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
440 PM EDT Mon Jun 21 2021

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Southeastern Essex County in northern New York...
  Addison County in central Vermont...
  Northwestern Rutland County in southern Vermont...
  Northwestern Windsor County in southern Vermont...
  Southwestern Washington County in central Vermont...

* Until 545 PM EDT.

* At 439 PM EDT, a severe thunderstorm was located near Benson
  Landing, moving northeast at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and powerlines.

* Locations impacted include...
  Middlebury, Cornwall, Sudbury, Weybridge, Waltham, Salisbury,
  Bristol, Lincoln, Orwell, Monkton, Benson, Whiting, New Haven,
  Granville, Goshen, Hancock, Hubbardton, Shoreham, Ripton and
  Brandon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters on Lake Champlain should seek safe harbor now! Strong winds
will cause higher waves and sudden wind shifts may overturn boats.

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

&&

LAT...LON 4362 7342 4364 7343 4369 7341 4373 7337
      4374 7337 4377 7335 4379 7336 4381 7338
      4379 7358 4424 7315 4399 7279 4361 7330
      4363 7331 4363 7337 4360 7338
TIME...MOT...LOC 2039Z 227DEG 31KT 4372 7343 

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

Neiles

1 follow-up statement

678 
WWUS51 KBTV 212139
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
539 PM EDT Mon Jun 21 2021

NYC031-VTC001-021-023-027-212149-
/O.EXP.KBTV.SV.W.0013.000000T0000Z-210621T2145Z/
Essex NY-Addison VT-Rutland VT-Windsor VT-Washington VT-
539 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ESSEX...
ADDISON...NORTHWESTERN RUTLAND...NORTHWESTERN WINDSOR AND
SOUTHWESTERN WASHINGTON COUNTIES WILL EXPIRE AT 545 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern New York...and central and southern Vermont.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Burlington.

Remember, a Severe Thunderstorm Warning still remains in effect for
Rutland County. 

LAT...LON 4362 7342 4364 7343 4369 7341 4373 7337
      4374 7337 4377 7335 4379 7336 4381 7338
      4379 7358 4424 7315 4399 7279 4361 7330
      4363 7331 4363 7337 4360 7338
TIME...MOT...LOC 2139Z 227DEG 31KT 4407 7291 

$$

Neiles

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 10:08 AM EDT	Special Weather Statement	BTV	Grand Isle	37 min
Jun 21, 3:07 PM EDT	Special Weather Statement	BTV	Franklin	23 min
Jun 21, 3:13 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Washington	62 min
Jun 21, 3:47 PM EDT	Special Weather Statement	BTV	Lamoille	58 min
Jun 21, 4:15 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Lamoille, Orange, Washington	60 min
Jun 21, 4:54 PM EDT	Special Weather Statement	BTV	Chittenden, Franklin, Lamoille	51 min
Jun 21, 5:12 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Orange, Rutland, Windsor	63 min
Jun 21, 5:17 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Caledonia, Chittenden, Lamoille, Orange, Orleans and 2 more	58 min
Jun 21, 5:39 PM EDT	Special Weather Statement	BTV	Essex	36 min
Jun 21, 6:01 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex	59 min
Jun 21, 6:18 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	57 min
Jun 21, 6:47 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Windsor	28 min
Jun 21, 7:04 PM EDT	Special Weather Statement	BTV	Caledonia	26 min
Jun 21, 7:29 PM EDT	Special Weather Statement	BTV	Caledonia	16 min
Jun 21, 7:50 PM EDT	Special Weather Statement	BTV	Rutland	25 min
Jun 21, 7:59 AM EDT	Special Weather Statement	BTV	St. Lawrence	61 min
Jun 21, 9:12 AM EDT	Special Weather Statement	BTV	Clinton, Franklin	48 min
Jun 21, 1:06 PM EDT	Special Weather Statement	BTV	St. Lawrence	39 min
Jun 21, 1:28 PM EDT	Special Weather Statement	BTV	St. Lawrence	62 min
Jun 21, 1:41 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, St. Lawrence	49 min
Jun 21, 2:08 PM EDT	Special Weather Statement	BTV	St. Lawrence	67 min
Jun 21, 2:35 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, St. Lawrence	55 min
Jun 21, 3:25 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex, Franklin, St. Lawrence	54 min
Jun 21, 4:57 PM EDT	Special Weather Statement	BTV	Essex	48 min
Jun 21, 7:50 PM EDT	Special Weather Statement	BTV	Essex	25 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2021 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.