Alert archive / Vermont / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Albany, NY

July 20, 2021Bennington County, Windham County, Vermont

NWS Albany, NY issued this severe thunderstorm warning at Jul 20, 2021, 10:00 PM EDT for Bennington County, Windham County, Vermont. It was in force for 45 min. 1 report 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 20, 2021, 10:00 PM EDT (02:00 UTC)
Expired: Jul 20, 2021, 10:45 PM EDT
In force: 45 min
Issued by: NWS Albany, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bennington County, VT, Windham County, VT

The radar

The Albany radar (KENX), 130 km from the middle of the area, began a volume at 02:00 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 20, 10:27 PM EDT	TSTM WND DMG	Putney, VT	TREES AND WIRES DOWN. TIME ESTIMATED BY RADAR.

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
Jul 20, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 2.0 hours before the alert went out and 109 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: 1226 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

941 
WUUS51 KALY 210200
SVRALY
VTC003-025-210245-
/O.NEW.KALY.SV.W.0128.210721T0200Z-210721T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Albany NY
1000 PM EDT Tue Jul 20 2021

The National Weather Service in Albany has issued a

* Severe Thunderstorm Warning for...
  Southeastern Bennington County in southern Vermont...
  Windham County in southern Vermont...

* Until 1045 PM EDT.

* At 1000 PM EDT, severe thunderstorms were located along a line
  extending from near Chester to near Monroe, moving east at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Brattleboro, Bellows Falls, Townshend, Putney, Vernon, Wilmington,
  Readsboro, Saxtons River, Westminster, Newfane, Guilford Center,
  Rockingham, Guilford, Whitingham, Dover, Marlboro, Wardsboro,
  Halifax, Grafton and Brookline.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

Please report hail size...damaging winds and reports of trees down to
the National Weather Service by email at Alb.Stormreport@noaa.gov...
On Facebook at www.facebook.com/nwsalbany or twitter @nwsalbany

LAT...LON 4308 7244 4305 7247 4300 7244 4297 7247
      4295 7253 4292 7252 4288 7255 4281 7254
      4278 7251 4277 7252 4277 7249 4273 7246
      4274 7301 4275 7301 4323 7266 4323 7243
      4315 7246 4312 7243
TIME...MOT...LOC 0200Z 280DEG 22KT 4322 7259 4274 7302 

HAIL...<.75IN
WIND...60MPH
 
$$

Rathbun

1 follow-up statement

985 
WWUS51 KALY 210243 RRA
SVSALY

Severe Weather Statement
National Weather Service Albany NY
1043 PM EDT Tue Jul 20 2021

VTC003-025-210253-
/O.EXP.KALY.SV.W.0128.000000T0000Z-210721T0245Z/
Bennington VT-Windham VT-
1043 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENNINGTON AND
WINDHAM COUNTIES WILL EXPIRE AT 1045 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern Vermont.

LAT...LON 4308 7244 4305 7247 4300 7244 4297 7247
      4295 7253 4292 7252 4288 7255 4281 7254
      4278 7251 4277 7252 4277 7249 4273 7246
      4274 7301 4275 7301 4323 7266 4323 7243
      4315 7246 4312 7243
TIME...MOT...LOC 0243Z 280DEG 22KT 4318 7226 4270 7269 

$$

Rathbun

The office that day

Everything else NWS Albany, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 9:24 PM EDT	Severe Thunderstorm Warning	ALY	Bennington, Windham	51 min
Jul 20, 9:38 PM EDT	Severe Thunderstorm Warning	ALY	Bennington	52 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2021 Every severe thunderstorm warning in 2021

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.