Alert archive / Vermont / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Burlington, VT

June 18, 2017Chittenden County, Franklin County, Lamoille County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jun 18, 2017, 11:27 PM EDT for Chittenden County, Franklin County, Lamoille County, Vermont. It was in force for 48 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 18, 2017, 11:27 PM EDT (03:27 UTC)
Expired: Jun 19, 2017, 12:15 AM EDT
In force: 48 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chittenden County, VT, Franklin County, VT, Lamoille County, VT

The radar

The Burlington radar (KCXX), 28 km from the middle of the area, began a volume at 03:31 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 18, 11:27 PM EDT	TSTM WND DMG	2 Ne Westford, VT	TREES DOWN
Jun 18, 11:30 PM EDT	TSTM WND DMG	2 Ene Fairfax, VT	TREE DOWN ON POWER LINES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 3.5 hours before the alert went out and 223 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: 157 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 954 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

183 
WUUS51 KBTV 190327
SVRBTV
VTC007-011-015-190415-
/O.NEW.KBTV.SV.W.0021.170619T0327Z-170619T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
1127 PM EDT SUN JUN 18 2017

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Northern Lamoille County in northwestern Vermont...
  Northeastern Chittenden County in northwestern Vermont...
  Southeastern Franklin County in northwestern Vermont...

* Until 1215 AM EDT

* At 1126 PM EDT, a severe thunderstorm was located over Cloverdale,
  moving northeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to trees and powerlines. 

* Locations impacted include...
  Waterville, Johnson Village, Underhill, Cambridge, Bakersfield,
  Cambridge Village, Westford, Johnson, Jeffersonville Village, Hyde
  Park, Underhill State Park, Fairfax, Belvidere Center, Fletcher,
  Belvidere, Fairfield, Hyde Park Village, Eden, Enosburg Falls
  Village and Jericho.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4449 7295 4465 7312 4490 7281 4465 7247
TIME...MOT...LOC 0326Z 229DEG 46KT 4464 7296 

HAIL...<.75IN
WIND...60MPH
 
$$

JMG

2 follow-up statements

333 
WWUS51 KBTV 190338
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
1138 PM EDT SUN JUN 18 2017

VTC007-190348-
/O.CAN.KBTV.SV.W.0021.000000T0000Z-170619T0415Z/
Chittenden VT-
1138 PM EDT SUN JUN 18 2017

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

LAT...LON 4465 7247 4454 7281 4455 7282 4455 7283
      4462 7290 4463 7292 4475 7300 4490 7281
TIME...MOT...LOC 0338Z 229DEG 46KT 4474 7280 

$$

VTC011-015-190415-
/O.CON.KBTV.SV.W.0021.000000T0000Z-170619T0415Z/
Lamoille VT-Franklin VT-
1138 PM EDT SUN JUN 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR NORTHERN LAMOILLE AND SOUTHEASTERN FRANKLIN COUNTIES...

At 1138 PM EDT, a severe thunderstorm was located over Waterville,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to trees and powerlines. 

Locations impacted include...
Waterville, Johnson Village, Cambridge, Bakersfield, Cambridge
Village, Johnson, Jeffersonville Village, Hyde Park, Belvidere
Center, Fletcher, Belvidere, Fairfield, Hyde Park Village, Eden,
Enosburg Falls Village, Enosburg, Fairfax, Morristown, Jeffersonville
and East Fletcher.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4465 7247 4454 7281 4455 7282 4455 7283
      4462 7290 4463 7292 4475 7300 4490 7281
TIME...MOT...LOC 0338Z 229DEG 46KT 4474 7280 

HAIL...<.75IN
WIND...60MPH
 
$$

JMG

284 
WWUS51 KBTV 190407
SVSBTV

Severe Weather Statement
National Weather Service Burlington VT
1207 AM EDT MON JUN 19 2017

VTC011-015-190416-
/O.EXP.KBTV.SV.W.0021.000000T0000Z-170619T0415Z/
Lamoille VT-Franklin VT-
1207 AM EDT MON JUN 19 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LAMOILLE AND
SOUTHEASTERN FRANKLIN COUNTIES WILL EXPIRE AT 1215 AM EDT...
        
The storm which prompted the warning has weakened and will be moving 
out of the warned area in the next 10 minutes. Therefore the warning 
will be allowed to expire.

LAT...LON 4465 7247 4454 7281 4455 7282 4455 7283
      4462 7290 4463 7292 4475 7300 4490 7281
TIME...MOT...LOC 0406Z 229DEG 46KT 4496 7244 

$$

JMG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 8:23 PM EDT	Special Weather Statement	BTV	Chittenden	52 min
Jun 18, 10:25 PM EDT	Special Weather Statement	BTV	Addison	50 min
Jun 18, 10:47 PM EDT	Special Weather Statement	BTV	Chittenden	43 min
Jun 18, 11:23 PM EDT	Special Weather Statement	BTV	Addison, Washington	67 min
Jun 18, 11:36 PM EDT	Special Weather Statement	BTV	Lamoille	24 min
Jun 18, 11:56 PM EDT	Special Weather Statement	BTV	Caledonia, Lamoille, Orange, Orleans, Washington	64 min
Jun 19, 1:00 AM EDT	Special Weather Statement	BTV	Orange	45 min
Jun 19, 3:24 PM EDT	Special Weather Statement	BTV	Essex	66 min
Jun 19, 3:43 PM EDT	Special Weather Statement	BTV	Rutland	62 min
Jun 19, 4:02 PM EDT	Flash Flood Warning	BTV	Essex	3 hr
Jun 19, 4:04 PM EDT	Special Weather Statement	BTV	Windsor	41 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2017 Every severe thunderstorm warning in 2017

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.