Alert archive / Vermont / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Burlington, VT

June 18, 2018Addison County, Chittenden County, Washington County, Vermont; Essex County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jun 18, 2018, 3:37 PM EDT for Addison County, Chittenden County, Washington County, Vermont; Essex County, New York. It was in force for 53 min. 4 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, 2018, 3:37 PM EDT (19:37 UTC)
Expired: Jun 18, 2018, 4:30 PM EDT
In force: 53 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Essex County, NY, Addison County, VT, Chittenden County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 39 km from the middle of the area, began a volume at 19:38 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, 3:47 PM EDT	TSTM WND DMG	3 E Upper Jay, NY	TREE DOWN ON POWERLINE
Jun 18, 4:05 PM EDT	TSTM WND DMG	2 Ssw Hinesburg, VT	TREE DOWN ON WIRES ON BALDWIN RD
Jun 18, 4:05 PM EDT	TSTM WND DMG	3 Ssw Hinesburg, VT	TREES DOWN WITH POWERLINES ON DRINKWATER RD
Jun 18, 4:36 PM EDT	TSTM WND DMG	1 Sse Waitsfield, VT	BARN DAMAGED. MULTIPLE TREES SNAPPED

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
Jun 18, 2:49 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.6 hours before the alert went out and 185 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: 1 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 1389 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

554 
WUUS51 KBTV 181937
SVRBTV
NYC031-VTC001-007-023-182030-
/O.NEW.KBTV.SV.W.0021.180618T1937Z-180618T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
337 PM EDT MON JUN 18 2018

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Northern Essex County in northern New York...
  Addison County in central Vermont...
  Southern Chittenden County in northwestern Vermont...
  Southern Washington County in central Vermont...

* Until 430 PM EDT.

* At 336 PM EDT, severe thunderstorms were located along a line
  extending from near Willsboro Bay to Lake Placid, moving east at 45
  mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and powerlines.

* Locations impacted include...
  Barre, Montpelier, Middlebury, Vergennes, Lake Placid, Essex,
  Moriah, Willsboro, Crown Point, Westport, Elizabethtown, Keene,
  Salisbury, Waterbury Village, Middlesex, Addison, Ripton, Jay In
  Essex County, Shelburne and Charlotte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

If on or near Lake Champlain, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4429 7232 4427 7232 4424 7234 4415 7253
      4416 7259 4412 7261 4385 7319 4420 7411
      4430 7412 4444 7351
TIME...MOT...LOC 1936Z 281DEG 40KT 4441 7349 4431 7399 

HAIL...0.75IN
WIND...60MPH
 
$$

RSD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 1:21 PM EDT	Special Weather Statement	BTV	Chittenden, Washington	39 min
Jun 18, 2:13 PM EDT	Special Weather Statement	BTV	Chittenden	62 min
Jun 18, 2:17 PM EDT	Special Weather Statement	BTV	Addison	58 min
Jun 18, 2:23 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Grand Isle, Lamoille, Washington	52 min
Jun 18, 3:10 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Chittenden, Essex, Lamoille, Orange, Washington	65 min
Jun 18, 4:15 PM EDT	Special Weather Statement	BTV	Rutland, Windsor	60 min
Jun 18, 4:31 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Caledonia, Orange, Washington, Windsor	59 min
Jun 18, 5:28 PM EDT	Special Weather Statement	BTV	Orange	62 min
Jun 18, 10:53 AM EDT	Special Weather Statement	BTV	Franklin	37 min
Jun 18, 3:18 PM EDT	Special Weather Statement	BTV	Essex	57 min
Jun 18, 4:24 PM EDT	Special Weather Statement	BTV	Franklin	66 min
Jun 18, 4:37 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Franklin, St. Lawrence	53 min
Jun 18, 5:34 PM EDT	Special Weather Statement	BTV	Clinton	56 min
Jun 18, 6:41 PM EDT	Flash Flood Warning	BTV	Franklin, St. Lawrence	3 hr

Nearby

Severe Thunderstorm Warnings in Vermont, 2018 Severe Thunderstorm Warnings in New York, 2018 Every severe thunderstorm warning in 2018

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.