Alert archive / Vermont / Tornado Warnings in 2007

Tornado Warning 4, NWS Burlington, VT

August 16, 20074 counties in Vermont

NWS Burlington, VT issued this tornado warning at Aug 16, 2007, 4:40 PM EDT for 4 counties in Vermont. It was in force for 35 min. 5 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, 4:40 PM EDT (20:40 UTC)
Expired: Aug 16, 2007, 5:15 PM EDT
In force: 35 min
Issued by: NWS Burlington, VT
Area: Counties, with a storm outline in the text

Counties Caledonia County, VT, Lamoille County, VT, Orleans County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 64 km from the middle of the area, began a volume at 20:43 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, 4:50 PM EDT	TSTM WND DMG	Hardwick, VT	TREES DOWN IN HARDWICK.
Aug 16, 4:55 PM EDT	TSTM WND DMG	4 Nnw Cabot, VT	TREES DOWN WITH SOME DAMAGE TO FARMSTEAD
Aug 16, 4:55 PM EDT	TSTM WND DMG	Greensboro Bend, VT	TREES DOWN AND POWER OUTAGE
Aug 16, 4:55 PM EDT	TSTM WND DMG	Hardwick, VT	TREES AND POWERLINES BLOWN DOWN.
Aug 16, 5:15 PM EDT	TSTM WND DMG	Lyndonville, VT	TREES REPORTED BLOWN DOWN.

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, 8.7 hours before the alert went out and 181 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 162041
TORBTV
VTC005-015-019-023-162115-
/O.NEW.KBTV.TO.W.0004.070816T2040Z-070816T2115Z/

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

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  WASHINGTON COUNTY IN CENTRAL VERMONT
  CALEDONIA COUNTY IN NORTHEAST VERMONT
  ORLEANS COUNTY IN NORTHEAST VERMONT
  LAMOILLE COUNTY IN NORTHWEST VERMONT

* UNTIL 515 PM EDT.

* AT 435 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  WOLCOTT..MOVING EAST AT 45 MPH. THIS IS A DANGEROUS STORM...AND 
  HAS A HISTORY OF PRODUCING WIDESPREAD SIGNIFICANT WIND DAMAGE AND 
  LARGE HAIL. 

* THE TORNADO IS WILL BE NEAR...
  HARDWICK AROUND 445 PM EDT.
  EAST HARDWICK AROUND 450 PM EDT.
  WALDEN AROUND 455 PM EDT.
  DANVILLE AND NORTH DANVILLE AROUND 500 PM EDT.
  ST. JOHNSBURY AND PASSUMPSIC AROUND 510 PM EDT.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
QUARTER SIZE HAIL AND DESTRUCTIVE 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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. 

LAT...LON 4468 7252 4450 7187 4419 7211 4453 7276
TIME...MOT...LOC 2040Z 292DEG 42KT 4454 7245

$$

NASH

1 follow-up statement

000 
WWUS51 KBTV 162102
SVSBTV

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

VTC015-162110-
/O.CAN.KBTV.TO.W.0004.000000T0000Z-070816T2115Z/
LAMOILLE VT-
500 PM EDT THU AUG 16 2007

...THE TORNADO WARNING FOR SOUTHEASTERN LAMOILLE COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO HAS MOVED 
EAST OF THE AREA.

LAT...LON 4462 7235 4450 7188 4448 7188 4444 7193
      4443 7193 4421 7210 4419 7211 4447 7245
TIME...MOT...LOC 2100Z 290DEG 33KT 4449 7223

$$

VTC005-019-023-162115-
/O.CON.KBTV.TO.W.0004.000000T0000Z-070816T2115Z/
CALEDONIA VT-WASHINGTON VT-ORLEANS VT-
500 PM EDT THU AUG 16 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR EXTREME
SOUTH CENTRAL ORLEANS...NORTHEASTERN WASHINGTON AND SOUTHERN
CALEDONIA COUNTIES...

AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS 
STORM WAS LOCATED NEAR EAST HARDWICK..MOVING EAST AT 40 MPH. THIS IS 
A DANGEROUS STORM...AND HAS A HISTORY OF PRODUCING SIGNIFICANT WIND 
DAMAGE.

THE TORNADO WILL BE NEAR...
  WEST DANVILLE AND SOUTH OF SOUTH WHEELOCK AROUND 505 PM
  EDT.
  DANVILLE AROUND 510 PM EDT.
  EXITS 21 AND 22 OF I91...ST. JOHNSBURY AROUND 515 PM EDT.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
LARGE HAIL AND DESTRUCTIVE 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. IF IN 
MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. 

LAT...LON 4462 7235 4450 7188 4448 7188 4444 7193
      4443 7193 4421 7210 4419 7211 4447 7245
TIME...MOT...LOC 2100Z 290DEG 33KT 4449 7223

$$
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, 4:14 PM EDT	Tornado Warning	BTV	Chittenden, Franklin, Lamoille	31 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.