Alert archive / Vermont / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 18, NWS Burlington, VT

June 29, 20194 counties in Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jun 29, 2019, 8:20 PM EDT for 4 counties in Vermont. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 29, 2019, 8:20 PM EDT (00:20 UTC)
Expired
Jun 29, 2019, 8:33 PM EDT
In force
13 min
Issued by
NWS Burlington, VT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Caledonia County, VT, Franklin County, VT, Lamoille County, VT, Orleans County, VT

The radar

The Burlington radar (KCXX), 58 km from the middle of the area, began a volume at 00:19 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.

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 0.3 hours before the alert went out and 197 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-pSkew-T log-p diagram, Gray, ME at 00:00Z on 2019-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 765 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 00:00Z on 2019-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
765 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1210 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 7:53 PM EDT, 27 minutes earlier.

Area forecast discussion, Jun 29, 7:53 PM EDT, 27 minutes before
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Hazardous weather outlook, Jun 29, 5:35 AM EDT, 14 hours 45 minutes before
Hazardous Weather Outlook
National Weather Service Burlington VT
535 AM EDT Sat Jun 29 2019

NYZ026>031-034-035-087-VTZ001>012-016>019-300945-
Northern St. Lawrence-Northern Franklin-Eastern Clinton-
Southeastern St. Lawrence-Southern Franklin-Western Clinton-
Western Essex-Eastern Essex-Southwestern St. Lawrence-Grand Isle-
Western Franklin-Orleans-Essex-Western Chittenden-Lamoille-Caledonia-
Washington-Western Addison-Orange-Western Rutland-Windsor-
Eastern Franklin-Eastern Chittenden-Eastern Addison-Eastern Rutland-
535 AM EDT Sat Jun 29 2019

This Hazardous Weather Outlook is for northern New York, central
Vermont, northeast Vermont, northwest Vermont and southern Vermont.

.DAY ONE...Today and tonight.

Showers and thunderstorms will redevelop across the North Country
this afternoon as a cold front pushes through. A few of the
thunderstorms could be strong to severe with the potential for gusty
winds and small hail. The potential for strong to severe
thunderstorms will diminish heading into this evening with the loss
of instability but continued rain showers and a few rumbles of
thunder are expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jun 29, 7:02 PM EDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Burlington VT
702 PM EDT Sat Jun 29 2019

VTZ001>007-016-300000-
Essex-Caledonia-Western Franklin-Grand Isle-Western
Chittenden-Eastern Franklin-Orleans-Lamoille-
702 PM EDT Sat Jun 29 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN LAMOILLE...
NORTHEASTERN CALEDONIA...ORLEANS...WEST CENTRAL ESSEX...NORTHEASTERN
GRAND ISLE...NORTH CENTRAL CHITTENDEN AND CENTRAL FRANKLIN
COUNTIES...

At 702 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Lewis to near Westmore to near St. Albans
City. Movement was southeast at 15 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Newport City, Island Pond, Enosburg Falls, Orleans, Derby Center,
Charleston, Johnson Village, Newport Town, Glover, Montgomery Center,
Albany, Burke, Montgomery, St. Albans City, Fairfax, Troy, Sheldon,
Belvidere Center, Newark and Brownington Village.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4474 7181 4461 7180 4464 7301 4491 7321
      4495 7219 4496 7202
TIME...MOT...LOC 2302Z 320DEG 11KT 4485 7177 4479 7200 4485 7309

Haynes
Special weather statement, Jun 29, 7:16 PM EDT, 1 hour 4 minutes before
Special Weather Statement
National Weather Service Burlington VT
716 PM EDT Sat Jun 29 2019

NYZ029-087-300015-
Southeastern St. Lawrence-Southwestern St. Lawrence-
716 PM EDT Sat Jun 29 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN ST. LAWRENCE
COUNTY...

At 716 PM EDT, a strong thunderstorm was located near Gouverneur,
moving southeast at 30 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Gouverneur, Rossie, Pitcairn, Balmat, West Fowler and Nelson Corner.

LAT...LON 4440 7556 4409 7516 4437 7577
TIME...MOT...LOC 2316Z 313DEG 25KT 4429 7554

Haynes
Special weather statement, Jun 29, 7:22 PM EDT, 58 minutes before
Special Weather Statement
National Weather Service Burlington VT
722 PM EDT Sat Jun 29 2019

VTZ005-006-008-017-300015-
Eastern Chittenden-Western Chittenden-Washington-Lamoille-
722 PM EDT Sat Jun 29 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN LAMOILLE...
NORTHEASTERN CHITTENDEN AND NORTHWESTERN WASHINGTON COUNTIES...

At 722 PM EDT, a strong thunderstorm was located near Milton, moving
southeast at 20 mph.

Wind gusts up to 50 mph are possible with this storm.

Locations impacted include...
Westford, Jericho Village, Underhill, Jericho, Underhill State Park,
Stowe, Bolton, Essex, Milton, Waterbury, Richmond, Worcester,
Colchester, Cambridge, Nashville, West Bolton, Moscow, Chimney
Corner, Jericho Center and North Underhill.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4461 7321 4466 7309 4446 7255 4439 7292
TIME...MOT...LOC 2322Z 305DEG 19KT 4459 7311

Haynes
Special weather statement, Jun 29, 7:33 PM EDT, 47 minutes before
Special Weather Statement
National Weather Service Burlington VT
733 PM EDT Sat Jun 29 2019

VTZ010-012-300000-
Windsor-Orange-
733 PM EDT Sat Jun 29 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ORANGE AND
NORTHEASTERN WINDSOR COUNTIES...

At 733 PM EDT, a strong thunderstorm was located over Thetford Hill
State Park, moving southeast at 20 mph.

Locations impacted include...
Norwich, Thetford, Thetford Hill State Park, Thetford Center, Sharon,
Strafford, Thetford Hill, North Thetford, South Strafford, East
Thetford, Union Village, Pompanoosuc, Post Mills and Union Village
Dam Recreation Area.

LAT...LON 4381 7244 4389 7226 4386 7219 4384 7218
      4382 7219 4381 7218 4379 7220 4377 7220
      4376 7222 4375 7222 4374 7225 4371 7229
TIME...MOT...LOC 2333Z 308DEG 19KT 4377 7225

Haynes
Special weather statement, Jun 29, 7:52 PM EDT, 28 minutes before
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Special weather statement, Jun 29, 7:56 PM EDT, 24 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 8:07 PM EDTSevere Thunderstorm WarningBTVAddison, Chittenden, Orange, Washington, Windsor53 min
Jun 29, 8:15 PM EDTSevere Thunderstorm WarningBTVChittenden, Franklin, Grand Isle60 min
Jun 29, 8:37 PM EDTSpecial Weather StatementBTVOrange68 min
Jun 29, 8:53 PM EDTSpecial Weather StatementBTVFranklin52 min
Jun 29, 9:25 PM EDTSpecial Weather StatementBTVOrange35 min
Jun 29, 10:09 PM EDTSevere Thunderstorm WarningBTVAddison, Rutland, Windsor66 min
Jun 30, 10:21 AM EDTSpecial Weather StatementBTVEssex54 min
Jun 30, 11:08 AM EDTSpecial Weather StatementBTVRutland52 min
Jun 30, 6:17 PM EDTSpecial Weather StatementBTVAddison43 min
Jun 29, 8:01 PM EDTSevere Thunderstorm WarningBTVSt. Lawrence59 min
Jun 29, 8:11 PM EDTSevere Thunderstorm WarningBTVClinton, Essex, Franklin, St. Lawrence64 min
Jun 30, 7:08 AM EDTSpecial Weather StatementBTVFranklin37 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2019Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.