Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Burlington, VT

June 21, 2021Orange County, Windsor County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jun 21, 2021, 6:47 PM EDT for Orange County, Windsor County, Vermont. It was in force for 28 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, 6:47 PM EDT (22:47 UTC)
Expired: Jun 21, 2021, 7:15 PM EDT
In force: 28 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Orange County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 116 km from the middle of the area, began a volume at 22:46 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, 6:53 PM EDT	TSTM WND DMG	Queechee State Park, VT	NUMEROUS TRESS AND POWERLINES DOWN ACROSS QUEECHEE, HARTFORD AND NORWICH. POWER OUTAGE MAPS SHOWS GREATER THAN 6000 PEOPLE WITHOUT POWER.

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, 10.8 hours before the alert went out and 160 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.

406 
WUUS51 KBTV 212247
SVRBTV
VTC017-027-212315-
/O.NEW.KBTV.SV.W.0018.210621T2247Z-210621T2315Z/

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

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Southeastern Orange County in central Vermont...
  Northeastern Windsor County in southern Vermont...

* Until 715 PM EDT.

* At 647 PM EDT, severe thunderstorms were located along a line
  extending from near Strafford to South Woodstock, moving east 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...
  Woodstock, Hartland Four Corners, Windsor, Woodstock Village,
  Sharon, Thetford Hill State Park, Thetford Center, Quechee,
  Ascutney, Strafford, Pomfret, Norwich, Thetford, Hartland,
  Hartford, West Windsor, Reading, Tunbridge, Fairlee and Royalton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4354 7266 4391 7246 4390 7215 4386 7219
      4381 7218 4379 7220 4377 7220 4370 7231
      4360 7234 4357 7238 4354 7238 4351 7240
      4350 7238 4348 7238 4340 7240
TIME...MOT...LOC 2247Z 281DEG 17KT 4387 7231 4356 7252 

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

Neiles

2 follow-up statements

015 
WWUS51 KBTV 212307
SVSBTV

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

VTC017-027-212315-
/O.CON.KBTV.SV.W.0018.000000T0000Z-210621T2315Z/
Orange VT-Windsor VT-
707 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN ORANGE AND NORTHEASTERN WINDSOR COUNTIES...

At 707 PM EDT, severe thunderstorms were located along a line
extending from Thetford to Hartland Four Corners, moving east 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...
Woodstock, Hartland Four Corners, Windsor, Thetford Hill State Park,
Thetford Center, Quechee, Ascutney, Strafford, Norwich, Thetford,
Hartland, Hartford, West Windsor, Sharon, Reading, Fairlee, Pomfret,
West Fairlee, Weathersfield and Queechee State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Burlington.

&&

LAT...LON 4349 7257 4391 7236 4390 7215 4386 7219
      4381 7218 4379 7220 4377 7220 4370 7231
      4360 7234 4357 7238 4354 7238 4351 7240
      4350 7238 4348 7238 4340 7240
TIME...MOT...LOC 2307Z 281DEG 17KT 4386 7223 4355 7244 

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

Neiles

451 
WWUS51 KBTV 212316
SVSBTV

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

VTC017-027-212326-
/O.EXP.KBTV.SV.W.0018.000000T0000Z-210621T2315Z/
Orange VT-Windsor VT-
716 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ORANGE AND
NORTHEASTERN WINDSOR COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.

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

LAT...LON 4349 7257 4391 7236 4390 7215 4386 7219
      4381 7218 4379 7220 4377 7220 4370 7231
      4360 7234 4357 7238 4354 7238 4351 7240
      4350 7238 4348 7238 4340 7240
TIME...MOT...LOC 2316Z 281DEG 17KT 4385 7218 4354 7239 

$$

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, 4:40 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, 6:01 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, 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.