Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 42, NWS Burlington, VT

September 15, 2021Rutland County, Windsor County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Sep 15, 2021, 1:15 PM EDT for Rutland County, Windsor County, Vermont. It was in force for 60 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: Sep 15, 2021, 1:15 PM EDT (17:15 UTC)
Expired: Sep 15, 2021, 2:15 PM EDT
In force: 60 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 109 km from the middle of the area, began a volume at 17:16 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, 1:26 PM EDT	TSTM WND DMG	Middletown Springs, VT	SEVERAL TREES DOWN IN MIDDLETON SPRINGS.

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

Albany, NY (KALY), launched 12:00Z, 5.3 hours before the alert went out and 113 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: 856 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

As transmitted.

366 
WUUS51 KBTV 151715
SVRBTV
VTC021-027-151815-
/O.NEW.KBTV.SV.W.0042.210915T1715Z-210915T1815Z/

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

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Central Rutland County in southern Vermont...
  Central Windsor County in southern Vermont...

* Until 215 PM EDT.

* At 115 PM EDT, a severe thunderstorm was located over Middletown
  Springs, moving northeast at 25 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...
  Rutland, Woodstock, Killington, Poultney Village, Tinmouth,
  Shrewsbury, Rutland City, Middletown Springs, Lake St. Catherine,
  Rutland - Southern Vermont Airport, Poultney, Plymouth, Mendon,
  Clarendon, Ira, Wells, Reading, West Rutland, Wallingford and
  Bridgewater.

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 4353 7325 4353 7324 4371 7284 4351 7252
      4340 7325
TIME...MOT...LOC 1715Z 245DEG 21KT 4350 7316 

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

$$

Hammond

2 follow-up statements

469 
WWUS51 KBTV 151740
SVSBTV

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

VTC021-027-151815-
/O.CON.KBTV.SV.W.0042.000000T0000Z-210915T1815Z/
Rutland VT-Windsor VT-
140 PM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR CENTRAL RUTLAND AND CENTRAL WINDSOR COUNTIES...

At 140 PM EDT, a severe thunderstorm was located over East Clarendon,
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...
Rutland, Woodstock, Killington, Poultney Village, Tinmouth,
Shrewsbury, Rutland City, Middletown Springs, Lake St. Catherine,
Rutland - Southern Vermont Airport, Poultney, Plymouth, Mendon,
Clarendon, Ira, Wells, Reading, West Rutland, Wallingford and
Bridgewater.

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 4353 7325 4353 7324 4371 7284 4351 7252
      4340 7325
TIME...MOT...LOC 1740Z 252DEG 27KT 4356 7292 

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

$$

Hammond

038 
WWUS51 KBTV 151808
SVSBTV

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

VTC021-027-151818-
/O.EXP.KBTV.SV.W.0042.000000T0000Z-210915T1815Z/
Rutland VT-Windsor VT-
208 PM EDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL RUTLAND AND CENTRAL
WINDSOR COUNTIES WILL EXPIRE AT 215 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 800 PM EDT for
southern Vermont.

LAT...LON 4353 7325 4353 7324 4371 7284 4351 7252
      4340 7325
TIME...MOT...LOC 1808Z 245DEG 21KT 4363 7273 

$$

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, 1:54 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, 2:32 PM EDT	Severe Thunderstorm Warning	BTV	Orange	34 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.