Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Burlington, VT

September 15, 2021Orange County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Sep 15, 2021, 2:32 PM EDT for Orange County, Vermont. It was in force for 34 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: Sep 15, 2021, 2:32 PM EDT (18:32 UTC)
Expired: Sep 15, 2021, 3:06 PM EDT
In force: 34 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Orange County, VT

The radar

The Burlington radar (KCXX), 101 km from the middle of the area, began a volume at 18:36 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
Sep 15, 2:39 PM EDT	TSTM WND DMG	Newbury, VT	TREES AND POWERLINES DOWN ALONG US 5.
Sep 15, 2:41 PM EDT	TSTM WND DMG	Bradford, VT	TREES AND POWERLINES DOWN ALONG US 5.

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
Sep 15, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 6.5 hours before the alert went out and 149 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: 101 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 299 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

190 
WUUS51 KBTV 151832
SVRBTV
VTC017-151930-
/O.NEW.KBTV.SV.W.0044.210915T1832Z-210915T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
232 PM EDT Wed Sep 15 2021

The National Weather Service in Burlington has issued a

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

* Until 330 PM EDT.

* At 230 PM EDT, a severe thunderstorm was located over West Fairlee,
  moving east 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...
  West Fairlee, Newbury Village, Bradford, Vershire, Fairlee,
  Strafford, Thetford, Newbury, Corinth, South Vershire, Bradford
  Center, West Fairlee Center, Ely, Post Mills and South Newbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4407 7205 4404 7208 4402 7208 4402 7209
      4399 7212 4397 7211 4396 7210 4395 7212
      4392 7212 4389 7217 4387 7217 4386 7233
      4394 7238 4410 7203 4409 7203 4409 7204
      4408 7203
TIME...MOT...LOC 1830Z 248DEG 25KT 4394 7223 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hammond

2 follow-up statements

862 
WWUS51 KBTV 151848
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
248 PM EDT Wed Sep 15 2021

VTC017-151930-
/O.CON.KBTV.SV.W.0044.000000T0000Z-210915T1930Z/
Orange VT-
248 PM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHEASTERN ORANGE COUNTY...

At 247 PM EDT, a severe thunderstorm was located near South Newbury,
moving east 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...
Newbury Village, Bradford, Fairlee, West Fairlee, Thetford, Newbury,
Bradford Center, Ely and South Newbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4407 7205 4404 7208 4402 7208 4402 7209
      4399 7212 4397 7211 4396 7210 4395 7212
      4392 7212 4389 7217 4387 7217 4387 7224
      4402 7220 4410 7203 4409 7203 4409 7204
      4408 7203
TIME...MOT...LOC 1847Z 248DEG 25KT 4399 7208 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hammond

633 
WWUS51 KBTV 151906
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
306 PM EDT Wed Sep 15 2021

VTC017-151916-
/O.CAN.KBTV.SV.W.0044.000000T0000Z-210915T1930Z/
Orange VT-
306 PM EDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ORANGE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

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

LAT...LON 4407 7205 4404 7208 4402 7208 4402 7209
      4399 7212 4397 7211 4396 7210 4395 7212
      4392 7212 4389 7217 4387 7217 4387 7224
      4402 7220 4410 7203 4409 7203 4409 7204
      4408 7203
TIME...MOT...LOC 1903Z 248DEG 25KT 4404 7191 

$$

Hammond

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 4:22 AM EDT	Special Weather Statement	BTV	Grand Isle	23 min
Sep 15, 4:50 AM EDT	Special Weather Statement	BTV	Grand Isle	40 min
Sep 15, 5:33 AM EDT	Special Weather Statement	BTV	Chittenden, Franklin, Lamoille	42 min
Sep 15, 7:20 AM EDT	Special Weather Statement	BTV	Orleans	25 min
Sep 15, 7:54 AM EDT	Special Weather Statement	BTV	Essex	36 min
Sep 15, 1:08 PM EDT	Special Weather Statement	BTV	Rutland	52 min
Sep 15, 1:15 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	60 min
Sep 15, 1:54 PM EDT	Special Weather Statement	BTV	Washington	66 min
Sep 15, 2:03 PM EDT	Special Weather Statement	BTV	Orange	27 min
Sep 15, 2:07 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	53 min
Sep 15, 2:23 PM EDT	Special Weather Statement	BTV	Lamoille	37 min
Sep 15, 3:02 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	28 min
Sep 15, 3:16 PM EDT	Special Weather Statement	BTV	Essex	29 min
Sep 15, 3:30 PM EDT	Special Weather Statement	BTV	Windsor	30 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.