Alert archive / Vermont / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Burlington, VT

May 29, 20126 counties in Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at May 29, 2012, 2:46 PM EDT for 6 counties in Vermont; Essex County, New York. It was in force for 59 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: May 29, 2012, 2:46 PM EDT (18:46 UTC)
Expired: May 29, 2012, 3:45 PM EDT
In force: 59 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Essex County, NY, Addison County, VT, Chittenden County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 86 km from the middle of the area, began a volume at 18:49 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
May 29, 2:54 PM EDT	HAIL 1	Crown Point, NY
May 29, 3:28 PM EDT	HAIL 0.75	3 Nne Shoreham, VT
May 29, 3:45 PM EDT	HAIL 1.25	Shoreham, VT

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
May 29, 12:26 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.8 hours before the alert went out and 127 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: 1908 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

084 
WUUS51 KBTV 291846
SVRBTV
NYC031-VTC001-007-017-021-023-027-291945-
/O.NEW.KBTV.SV.W.0021.120529T1846Z-120529T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
246 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WINDSOR COUNTY IN SOUTHERN VERMONT...
  WESTERN ORANGE COUNTY IN CENTRAL VERMONT...
  SOUTHWESTERN WASHINGTON COUNTY IN CENTRAL VERMONT...
  SOUTHEASTERN ESSEX COUNTY IN NORTHERN NEW YORK...
  SOUTHEASTERN CHITTENDEN COUNTY IN NORTHWEST VERMONT...
  ADDISON COUNTY IN CENTRAL VERMONT...
  NORTHERN RUTLAND COUNTY IN SOUTHERN VERMONT...

* UNTIL 345 PM EDT.

* AT 242 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR CORNWALL...
  MOVING EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...
  RIPTON...BRISTOL...SOUTH LINCOLN...LINCOLN...GRANVILLE...WARREN...
  ROXBURY...WEST BROOKFIELD...BROOKFIELD...NORTHFIELD...

THIS SEVERE THUNDERSTORM IS ALSO PRODUCING DEADLY CLOUD TO GROUND
LIGHTNING.

WHEN YOU CAN DO SO SAFELY...PLEASE REPORT DAMAGING WINDS OR HAIL TO
THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1 800 8 6 3 4 2 7
9...OR BY SUBMITTING A STORM REPORT AT WEATHER.GOV/BURLINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET TO SAFETY IMMEDIATELY WHEN THREATENING WEATHER APPROACHES. WINDS
MAY KNOCK DOWN TREES AND POWER LINES AND DAMAGE BUILDINGS. LARGE HAIL
MAY CAUSE INJURY AND DAMAGE PROPERTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM TUESDAY EVENING FOR
NORTHERN NEW YORK AND VERMONT.

&&

LAT...LON 4349 7311 4359 7331 4360 7330 4362 7332
      4362 7337 4365 7343 4376 7336 4380 7338
      4377 7368 4380 7373 4409 7366 4434 7266
      4393 7244 4352 7239
TIME...MOT...LOC 1846Z 253DEG 26KT 4397 7317

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 12:00 AM EDT	Special Weather Statement	BTV	Orange, Windsor	60 min
May 29, 12:06 AM EDT	Severe Thunderstorm Warning	BTV	Orange, Windsor	39 min
May 29, 1:12 AM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Orange, Washington	63 min
May 29, 1:30 AM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex, Orange, Washington	60 min
May 29, 2:29 AM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Washington	41 min
May 29, 2:48 AM EDT	Special Weather Statement	BTV	Franklin, Orleans	57 min
May 29, 4:12 AM EDT	Special Weather Statement	BTV	Chittenden	63 min
May 29, 4:28 AM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden	62 min
May 29, 4:46 AM EDT	Special Weather Statement	BTV	Grand Isle	29 min
May 29, 5:05 AM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle, Lamoille, Orleans	55 min
May 29, 6:26 AM EDT	Severe Thunderstorm Warning	BTV	Addison	64 min
May 29, 7:07 AM EDT	Flash Flood Watch	BTV	Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle and 5 more	15 hr
May 29, 8:52 AM EDT	Special Weather Statement	BTV	Caledonia, Chittenden, Orange, Washington	53 min
May 29, 9:42 AM EDT	Special Weather Statement	BTV	Caledonia	63 min
May 29, 9:47 AM EDT	Special Weather Statement	BTV	Essex	28 min
May 29, 12:56 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Grand Isle	34 min
May 29, 1:29 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Grand Isle, Orleans	61 min
May 29, 1:48 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland, Windsor	57 min
May 29, 1:51 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Washington	84 min
May 29, 1:56 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland	64 min
May 29, 2:18 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	57 min
May 29, 2:18 PM EDT	Tornado Warning	BTV	Franklin, Lamoille, Orleans	57 min
May 29, 2:31 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Lamoille, Washington	23 min
May 29, 2:50 PM EDT	Tornado Warning	BTV	Caledonia, Franklin, Lamoille, Orleans	25 min
May 29, 2:59 PM EDT	Flash Flood Warning	BTV	Addison	4 hr
May 29, 3:09 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle, Lamoille	66 min
May 29, 3:12 PM EDT	Tornado Warning	BTV	Caledonia, Essex, Lamoille, Orleans	42 min
May 29, 3:28 PM EDT	Flash Flood Warning	BTV	Addison, Chittenden, Orange, Rutland, Washington, Windsor	4 hr
May 29, 3:30 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Orleans	30 min
May 29, 3:41 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Caledonia, Orange, Rutland, Washington, Windsor	64 min
May 29, 3:43 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle, Lamoille, Orleans, Washington	47 min
May 29, 4:02 PM EDT	Tornado Warning	BTV	Addison, Orange, Rutland, Washington, Windsor	29 min
May 29, 4:22 PM EDT	Flash Flood Warning	BTV	Caledonia, Chittenden, Essex, Franklin, Lamoille, Orleans and 1 more	4 hr
May 29, 4:54 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Rutland, Windsor	66 min
May 29, 5:41 PM EDT	Special Weather Statement	BTV	Rutland, Windsor	2 hr
May 29, 6:06 PM EDT	Special Weather Statement	BTV	Windsor	24 min
May 28, 11:46 PM EDT	Special Weather Statement	BTV	Essex	59 min
May 29, 12:57 PM EDT	Severe Thunderstorm Warning	BTV	Essex, Franklin, St. Lawrence	63 min
May 29, 2:15 PM EDT	Special Weather Statement	BTV	Essex	3 hr
May 29, 2:39 PM EDT	Severe Thunderstorm Warning	BTV	Essex, Franklin, St. Lawrence	66 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2012 Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning in 2012

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.