Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Burlington, VT

June 21, 2021Caledonia County, Essex County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jun 21, 2021, 6:01 PM EDT for Caledonia County, Essex County, Vermont. It was in force for 59 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, 6:01 PM EDT (22:01 UTC)
Expired: Jun 21, 2021, 7:00 PM EDT
In force: 59 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caledonia County, VT, Essex County, VT

The radar

The Burlington radar (KCXX), 118 km from the middle of the area, began a volume at 22:01 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, 6:10 PM EDT	HAIL 1	1 Sw St. Johnsbury, VT	HALF INCH TO QUARTER SIZED HAIL FELL FOR ABOUT 10 MINUTES.

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

Gray, ME (KGYX), launched 12:00Z, 10.0 hours before the alert went out and 131 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: 20 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

167 
WUUS51 KBTV 212201
SVRBTV
VTC005-009-212300-
/O.NEW.KBTV.SV.W.0016.210621T2201Z-210621T2300Z/

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

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  East central Caledonia County in northeastern Vermont...
  Southern Essex County in northeastern Vermont...

* Until 700 PM EDT.

* At 600 PM EDT, a severe thunderstorm was located over Passumpsic,
  moving northeast at 20 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...
  St. Johnsbury, Guildhall, Waterford, Concord, Lunenburg, Maidstone,
  Kirby, Lower Waterford, Victory, Barnet, Granby, Danville, Peacham,
  St. Johnsbury Center, Concord Corner, West Waterford, East St.
  Johnsbury, North Concord, East Concord and Miles Pond.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4456 7156 4456 7160 4454 7157 4452 7159
      4450 7158 4448 7160 4448 7163 4449 7163
      4447 7165 4446 7164 4442 7170 4440 7179
      4438 7181 4435 7182 4432 7210 4441 7214
      4466 7158 4465 7156 4460 7156 4458 7154
TIME...MOT...LOC 2200Z 246DEG 17KT 4437 7205 

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

Kutikoff

4 follow-up statements

093 
WWUS51 KBTV 212215
SVSBTV

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

VTC005-009-212300-
/O.CON.KBTV.SV.W.0016.000000T0000Z-210621T2300Z/
Caledonia VT-Essex VT-
615 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EAST CENTRAL CALEDONIA AND SOUTHERN ESSEX COUNTIES...

At 613 PM EDT, a severe thunderstorm was located over Waterford,
moving northeast at 20 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...
St. Johnsbury, Guildhall, Waterford, Concord, Lunenburg, Maidstone,
Kirby, Victory, Granby, Concord Corner, East St. Johnsbury, North
Concord, East Concord, Miles Pond and South Kirby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4456 7156 4456 7160 4454 7157 4452 7159
      4450 7158 4448 7160 4448 7163 4449 7163
      4447 7165 4446 7164 4442 7170 4440 7179
      4438 7181 4435 7182 4437 7196 4448 7198
      4466 7158 4465 7156 4460 7156 4458 7154
TIME...MOT...LOC 2213Z 246DEG 17KT 4440 7197 

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

Kutikoff

112 
WWUS51 KBTV 212233
SVSBTV

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

VTC005-009-212300-
/O.CON.KBTV.SV.W.0016.000000T0000Z-210621T2300Z/
Caledonia VT-Essex VT-
633 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EAST CENTRAL CALEDONIA AND SOUTHERN ESSEX COUNTIES...

At 632 PM EDT, a severe thunderstorm was located over East Concord,
moving northeast at 30 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...
Guildhall, Concord, Lunenburg, Maidstone, Kirby, Victory, Granby,
Waterford, Concord Corner, North Concord, East Concord, Miles Pond
and South Kirby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4436 7189 4450 7193 4466 7158 4465 7156
      4460 7156 4458 7154 4456 7156 4456 7160
      4454 7157 4452 7159 4450 7158 4448 7160
      4448 7163 4449 7163 4447 7165 4446 7164
      4442 7170 4440 7179 4438 7181 4435 7182
TIME...MOT...LOC 2232Z 239DEG 28KT 4441 7177 

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

Kutikoff

566 
WWUS51 KBTV 212242
SVSBTV

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

VTC005-212251-
/O.CAN.KBTV.SV.W.0016.000000T0000Z-210621T2300Z/
Caledonia VT-
642 PM EDT Mon Jun 21 2021

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

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northeastern Vermont.

LAT...LON 4438 7181 4447 7186 4461 7156 4460 7156
      4458 7154 4456 7156 4456 7160 4454 7157
      4452 7159 4450 7158 4448 7160 4448 7163
      4449 7163 4447 7165 4446 7164 4442 7170
      4440 7179
TIME...MOT...LOC 2241Z 246DEG 17KT 4443 7172 

$$

VTC009-212300-
/O.CON.KBTV.SV.W.0016.000000T0000Z-210621T2300Z/
Essex VT-
642 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHEASTERN ESSEX COUNTY...

At 641 PM EDT, a severe thunderstorm was located over Gilman, moving
northeast at 20 mph.

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

SOURCE...Public.

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

Locations impacted include...
Guildhall, Concord, Lunenburg, Maidstone, Miles Pond, North Concord
and East Concord.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4438 7181 4447 7186 4461 7156 4460 7156
      4458 7154 4456 7156 4456 7160 4454 7157
      4452 7159 4450 7158 4448 7160 4448 7163
      4449 7163 4447 7165 4446 7164 4442 7170
      4440 7179
TIME...MOT...LOC 2241Z 246DEG 17KT 4443 7172 

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

Kutikoff

088 
WWUS51 KBTV 212256
SVSBTV

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

VTC009-212306-
/O.EXP.KBTV.SV.W.0016.000000T0000Z-210621T2300Z/
Essex VT-
656 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ESSEX COUNTY WILL
EXPIRE AT 700 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
northeastern Vermont.

LAT...LON 4438 7181 4447 7186 4461 7156 4460 7156
      4458 7154 4456 7156 4456 7160 4454 7157
      4452 7159 4450 7158 4448 7160 4448 7163
      4449 7163 4447 7165 4446 7164 4442 7170
      4440 7179
TIME...MOT...LOC 2256Z 246DEG 17KT 4445 7166 

$$

Kutikoff

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, 4:40 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland, Washington, Windsor	65 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, 6:18 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

Nearby

Severe Thunderstorm Warnings in Vermont, 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.