Alert archive / Vermont / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 43, NWS Burlington, VT

July 17, 2017Rutland County, Windsor County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jul 17, 2017, 5:18 PM EDT for Rutland County, Windsor County, Vermont. It was in force for 57 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: Jul 17, 2017, 5:18 PM EDT (21:18 UTC)
Expired: Jul 17, 2017, 6:15 PM EDT
In force: 57 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 124 km from the middle of the area, began a volume at 21:21 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
Jul 17, 5:20 PM EDT	HAIL 1	Ludlow, VT
Jul 17, 6:00 PM EDT	TSTM WND DMG	3 S Ludlow, VT	TREES AND POWERLINES DOWN ON SOUTH HILL ROAD
Jul 17, 6:00 PM EDT	HAIL 1	3 S Ludlow, VT
Jul 17, 6:18 PM EDT	HAIL 0.75	Cavendish, VT
Jul 17, 6:22 PM EDT	HAIL 1	Proctorsville, VT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 17, 12:48 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.3 hours before the alert went out and 141 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: 171 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

760 
WUUS51 KBTV 172118
SVRBTV
VTC021-027-172215-
/O.NEW.KBTV.SV.W.0043.170717T2118Z-170717T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Burlington VT
518 PM EDT MON JUL 17 2017

The National Weather Service in Burlington has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rutland County in southern Vermont...
  Southern Windsor County in southern Vermont...

* Until 615 PM EDT

* At 518 PM EDT, a severe thunderstorm was located over Ludlow,
  moving northeast at 20 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and powerlines. 

* Locations impacted include...
  Woodstock, Chester, Hartland Four Corners, Windsor, Woodstock
  Village, Mount Holly, Ludlow, Cavendish, Ludlow Village, Plymouth,
  Hartland, Reading, Baltimore, West Windsor, Quechee, Pomfret,
  Andover, Weathersfield, Bridgewater and Hartford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4340 7286 4371 7253 4360 7234 4358 7236
      4357 7238 4354 7238 4353 7240 4351 7240
      4350 7238 4348 7238 4328 7268
TIME...MOT...LOC 2118Z 221DEG 19KT 4340 7271 

HAIL...1.00IN
WIND...60MPH
 
$$

Lahiff

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 Jul 17, 4:33 PM EDT, 45 minutes earlier.

Area forecast discussion, Jul 17, 4:33 PM EDT, 45 minutes before

Area Forecast Discussion
National Weather Service Burlington VT
433 PM EDT Mon Jul 17 2017

.SYNOPSIS...
A slow moving upper level disturbance continues to push east
along the international border, scattered showers and embedded
thunderstorms will continue into the evening hours. The upper
level disturbance will move east on Tuesday but still a few
additional showers or thunderstorms are possible especially over
eastern Vermont. A ridge of high pressure will bring warmer and
drier conditions to the area on Wednesday before another
frontal system moves in on Thursday and Friday with a chance of
showers and thunderstorms. Cooler and drier weather are likely
by Saturday under high pressure.

&&

.NEAR TERM /THROUGH TUESDAY NIGHT/...
As of 415 PM EDT Monday...Severe thunderstorm watch only
remains for Rutland and Windsor counties in Vermont until 8 pm.

Upper level trough very slowly pushing eastward along the
international border currently. Scattered showers with embedded
thunderstorms will continue into the evening hours. Convective
activity will be ending with loss of daytime heating following
sunset. After midnight expect mainly dry conditions with mild
temperatures under partly cloudy skies. Areas of dense of fog
are expected after 06z, especially at locations where heavy rain
fell with thunderstorms today and at the typically fog prone
spots. Upper level trough continues to push eastward overnight
and into Tuesday morning. Some showers are possible east of the
Greens Tuesday morning, but as trough pushes east will lose the
forcing and the rest of the day should be drier. Tuesday will be
the start of a short lived warm up with surface and upper level
ridging beginning. 850 temps will reach the upper teens and
temperatures push into the 80s across our forecast area. Tuesday
night will be dry and slightly warmer than seasonal normals.

&&

.SHORT TERM /WEDNESDAY/...
As of 430 PM EDT Monday...Ridge of high pressure will be over
the North Country most of Wednesday, keeping things dry into the
late afternoon/early evening hours. Clouds will be increasing
from the northwest ahead of approaching frontal boundary.
There's a slight chance that precipitation may reach northern St
Lawrence county through the Champlain Valley around the
international border during the afternoon. 925mb temperatures
will reach 20C-22C with plentiful sunshine during most of the
day allowing max temperatures to reach the 80s.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
As of 430 PM EDT Monday...Overall active pattern continues
throughout the long term. Frontal boundary looks to weaken as it
moves into the North Country Wednesday night. Expect showers
and possible thunderstorms to dissipate by Thursday morning.
This brief break will see more showers and thunderstorms
developing Thursday afternoon into evening as a mid-level
shortwave moves across the region. Model guidance differs on the
timing and strength of this shortwave and the surface trough
reflected at the surface. Surface trough and showers could
linger into Friday before high pressure builds in Friday night
into early Saturday. Yet another shortwave looks to affect the
northeast for the latter half of Saturday into Sunday. Model
guidance then differ on a more significant vort and associated
trough tracking across the Great Lakes and the exact timing and
track it takes Sunday. Lots of uncertainty, however with the
southward progression of vorticity on GFS and ECMWF, leaning
toward a wetter solution Sunday into Sunday night. There is a
large surface ridge building into the region from
Canada...extending from James Bay for the beginning of the work
week that could provide a period of drier weather.

Overall temperatures throughout the period will be withing 5
degrees of normal for this time of year.

&&

&&

.AVIATION /20Z MONDAY THROUGH SATURDAY/...
Through 18Z Tuesday...Locally MVFR/IFR visibilities in heavier
SHRA/TSRA+ this afternoon, as upper level trof moves eastward.
Could be some hail, gusty winds, and heavy rain with any TSRA.
Storms are pretty much past MSS and SLK but have TS mentioned at
all other TAF sites over the next couple hours. Winds light and
variable trending southerly 10 kts or less except higher near
TSRA. Some areas of IFR Fog developing toward 04-07Z after all
the rain with partial clearing and light winds.

Outlook...

Tuesday Night: VFR. NO SIG WX.
Wednesday: VFR. Slight Chance SHRA...Slight Chance TSRA.
Wednesday Night: VFR. Chance SHRA...Slight Chance TSRA.
Thursday: VFR. Chance SHRA...Slight Chance TSRA.
Thursday Night: VFR. Chance SHRA...Slight Chance TSRA.
Friday: VFR. Chance SHRA...Slight Chance TSRA.
Friday Night: VFR. Slight Chance SHRA...Slight Chance TSRA.
Saturday: VFR. Slight Chance SHRA.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...None.
NY...None.

&&

SYNOPSIS...Neiles
NEAR TERM...Neiles
SHORT TERM...KGM
LONG TERM...KGM
AVIATION...Neiles

Hazardous weather outlook, Jul 17, 3:44 AM EDT, 13 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Burlington VT
344 AM EDT Mon Jul 17 2017

NYZ026>031-034-035-087-VTZ001>012-016>019-180745-
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-
344 AM EDT Mon Jul 17 2017

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

.DAY ONE...Today and Tonight.

Numerous showers and thunderstorms are expected to develop across
Vermont and northern New York today. A few stronger storms are
expected, containing locally frequent lightning, strong gusty winds,
hail, and brief heavy rainfall causing isolated flash flooding.
Activity should decrease in areal coverage and intensity during this
evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

SPOTTER activation will likely be needed.

In the hours before

Local storm report, Jul 17, 2:16 PM EDT, 3 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
216 PM EDT MON JUL 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0110 PM     LIGHTNING        PERU                    44.58N  73.53W
07/17/2017                   CLINTON            NY   PUBLIC

            LIGHTNING HIT A TREE

&&

EVENT NUMBER BTV1702074

NEILES

Special weather statement, Jul 17, 3:12 PM EDT, 2 hours 6 minutes before

Special Weather Statement
National Weather Service Burlington VT
312 PM EDT MON JUL 17 2017

VTZ003-004-007-008-010-012-019-172015-
Essex-Caledonia-Eastern Rutland-Windsor-Washington-Orleans-Orange-
312 PM EDT MON JUL 17 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ORANGE...CALEDONIA...
EASTERN ORLEANS...WESTERN ESSEX...NORTHERN WINDSOR AND NORTHEASTERN
WASHINGTON COUNTIES...

At 310 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Derby Line Village to near
Killington. Movement was northeast at 20 mph.

Locations impacted include...
Barre, St. Johnsbury, Island Pond, Lyndon, Charleston, Bradford,
Orange, Thetford Hill State Park, Glover, Websterville, Burke,
Thetford, Greensboro Bend, Averill, Marshfield, Newark, Cabot
Village, West Burke Village, Tunbridge and Sharon.

Torrential rainfall is occurring with these storms, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is also occurring with these
storms. Lightning can strike 10 miles away from a thunderstorm. Seek
a safe shelter inside a building or vehicle.

LAT...LON 4434 7196 4432 7203 4428 7207 4416 7205
      4376 7225 4365 7284 4501 7206 4501 7162
TIME...MOT...LOC 1910Z 226DEG 17KT 4500 7204 4369 7280

Lahiff

Local storm report, Jul 17, 3:34 PM EDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
334 PM EDT MON JUL 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     HAIL             4 NW KILLINGTON         43.72N  72.82W
07/17/2017  E1.00 INCH       RUTLAND            VT   PUBLIC

            HAIL SIZE OF QUARTERS ALONG THE KILLINGTON/PITTSFIELD
            TOWN LINE ALONG RT 100

&&

EVENT NUMBER BTV1702075

NASH

Local storm report, Jul 17, 3:49 PM EDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
349 PM EDT MON JUL 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 PM     FLASH FLOOD      1 ESE WAITSFIELD        44.18N  72.80W
07/17/2017                   WASHINGTON         VT   CO-OP OBSERVER

            MINOR CULVERT DAMAGE... TIME ESTIMATED BASED ON
            PICTURES/RADAR.

&&

EVENT NUMBER BTV1702076

TABER

Special weather statement, Jul 17, 3:54 PM EDT, 1 hour 24 minutes before

Special Weather Statement
National Weather Service Burlington VT
354 PM EDT MON JUL 17 2017

NYZ029-172100-
Southeastern St. Lawrence-
354 PM EDT MON JUL 17 2017

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

At 353 PM EDT, a strong thunderstorm was located 12 miles southwest
of Star Lake, moving northeast at 20 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Oswegatchie, Cranberry Lake, Star Lake, Degrasse, Fine, Lower
Oswegatchie, Aldrich, Newton Falls, Shurtleff, Wanakena and South
Russell.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 4437 7515 4441 7513 4426 7466 4407 7488
      4405 7507 4413 7524
TIME...MOT...LOC 1953Z 207DEG 18KT 4400 7515

Lahiff

Special weather statement, Jul 17, 5:04 PM EDT, 14 minutes before

Special Weather Statement
National Weather Service Burlington VT
504 PM EDT MON JUL 17 2017

VTZ012-019-172200-
Eastern Rutland-Windsor-
504 PM EDT MON JUL 17 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN RUTLAND AND
SOUTHWESTERN WINDSOR COUNTIES...

At 504 PM EDT, a strong thunderstorm was located over Ludlow, moving
northeast at 10 mph.

Locations impacted include...
Chester, Woodstock, Mount Holly, Ludlow, Cavendish, Andover, Weston,
Ludlow Village, Perkinsville Village, Mt. Holly, Ascutney, Plymouth,
Reading, Baltimore, Weathersfield, West Windsor, Mount Tabor,
Bridgewater, Windsor and Shrewsbury.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4325 7282 4330 7282 4330 7288 4334 7293
      4363 7269 4341 7240 4340 7240 4339 7241
      4323 7274
TIME...MOT...LOC 2104Z 233DEG 7KT 4339 7273

Lahiff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 8:11 PM EDT	Special Weather Statement	BTV	Addison	64 min
Jul 16, 8:30 PM EDT	Flash Flood Warning	BTV	Addison	2 hr
Jul 17, 11:04 AM EDT	Special Weather Statement	BTV	Lamoille	56 min
Jul 17, 1:10 PM EDT	Special Weather Statement	BTV	Addison, Chittenden, Franklin	65 min
Jul 17, 2:02 PM EDT	Flash Flood Warning	BTV	Lamoille, Washington	6 hr
Jul 17, 2:09 PM EDT	Special Weather Statement	BTV	Caledonia, Essex, Lamoille, Orange, Orleans, Washington	66 min
Jul 17, 2:10 PM EDT	Special Weather Statement	BTV	Windsor	35 min
Jul 17, 2:16 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	59 min
Jul 17, 3:12 PM EDT	Special Weather Statement	BTV	Caledonia, Orange	63 min
Jul 17, 5:04 PM EDT	Special Weather Statement	BTV	Windsor	56 min
Jul 17, 5:29 PM EDT	Flash Flood Warning	BTV	Rutland, Windsor	3 hr
Jul 17, 6:13 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	62 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2017 Every severe thunderstorm warning in 2017

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.