Alert archive / Vermont / Tornado Warnings in 2007

Tornado Warning 3, NWS Burlington, VT

August 16, 2007Chittenden County, Franklin County, Lamoille County, Vermont

NWS Burlington, VT issued this tornado warning at Aug 16, 2007, 4:14 PM EDT for Chittenden County, Franklin County, Lamoille County, Vermont. It was in force for 31 min. 3 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: Aug 16, 2007, 4:14 PM EDT (20:14 UTC)
Expired: Aug 16, 2007, 4:45 PM EDT
In force: 31 min
Issued by: NWS Burlington, VT
Area: Counties, with a storm outline in the text

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

The radar

The Burlington radar (KCXX), 39 km from the middle of the area, began a volume at 20:17 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
Aug 16, 4:20 PM EDT	TSTM WND DMG	Cambridge, VT	NUMEROUS TREES DOWN ALONG ROUTE 15 AND BRYCE ROAD IN THE TOWN OF CAMBRIDGE
Aug 16, 4:30 PM EDT	TSTM WND DMG	Jeffersonville, VT	SEVERAL TREES DOWN ON ROUTE 108.
Aug 16, 4:40 PM EDT	HAIL 0.75	Jeffersonville, VT

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 12:00Z, 8.2 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS51 KBTV 162015
TORBTV
VTC007-011-015-162045-
/O.NEW.KBTV.TO.W.0003.070816T2014Z-070816T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
414 PM EDT THU AUG 16 2007

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  CHITTENDEN COUNTY IN NORTHWEST VERMONT
  FRANKLIN COUNTY IN NORTHWEST VERMONT
  LAMOILLE COUNTY IN NORTHWEST VERMONT

* UNTIL 445 PM EDT.

* AT 413 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  CAMBRIDGE..MOVING EAST AT 50 MPH. THIS STORM HAS ALREADY PRODUCED 
  SIGNIFICANT WIND DAMAGE. 

* THE TORNADO IS WILL BE NEAR...
  JEFFERSONVILLE...4 MILES NORTH OF UNDERHILL STATE PARK AND 6 MILES
  SOUTH OF WATERVILLE AROUND 420 PM EDT.
  5 MILES SOUTH OF JOHNSON AROUND 425 PM EDT.
  6 MILES NORTH OF STOWE AROUND 430 PM EDT.

THIS IS A DANGEROUS STORM...AND IS ALSO CAPABLE OF PRODUCING LARGE 
HAIL AND STRAIGHT LINE WINDS IN EXCESS OF 70 MPH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. IF NO 
BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE 
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE 
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM 
WINDOWS.

LAT...LON 4480 7261 4442 7265 4458 7297 4475 7281
TIME...MOT...LOC 2014Z 292DEG 44KT 4462 7291

$$
NASH

1 follow-up statement

000 
WWUS51 KBTV 162028
SVSBTV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
426 PM EDT THU AUG 16 2007

VTC007-011-015-162045-
/O.CON.KBTV.TO.W.0003.000000T0000Z-070816T2045Z/
LAMOILLE VT-CHITTENDEN VT-FRANKLIN VT-
426 PM EDT THU AUG 16 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR SOUTH
CENTRAL FRANKLIN...NORTHEASTERN CHITTENDEN AND WESTERN LAMOILLE
COUNTIES IN VERMONT...

AT 425 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE 
STORM WAS NEAR SOUTH CAMBRIDGE..MOVING EAST AT 50 MPH.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS IN EXCESS OF 
70 MPH. 

THIS IS A DANGEROUS STORM. MANY REPORTS OF TREES BLOWN DOWN...ROOFS 
OFF HOMES AND LARGE HAIL CONTINUE TO BE RECEIVED.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. IF NO 
BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE 
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET.

LAT...LON 4480 7261 4442 7265 4458 7297 4475 7281
TIME...MOT...LOC 2026Z 291DEG 45KT 4457 7270

$$
NASH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 3:39 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	51 min
Aug 16, 3:52 PM EDT	Tornado Warning	BTV	Chittenden, Franklin, Grand Isle	38 min
Aug 16, 4:40 PM EDT	Tornado Warning	BTV	Caledonia, Lamoille, Orleans, Washington	35 min
Aug 16, 5:14 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex	31 min
Aug 16, 5:29 PM EDT	Severe Thunderstorm Warning	BTV	Rutland	31 min
Aug 16, 5:36 PM EDT	Severe Thunderstorm Warning	BTV	Addison	24 min
Aug 16, 6:00 PM EDT	Tornado Warning	BTV	Rutland	35 min
Aug 16, 6:06 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	39 min
Aug 16, 6:25 PM EDT	Tornado Warning	BTV	Windsor	35 min

Nearby

Tornado Warnings in Vermont, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.