Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 13, NWS Boston/Norton, MA

June 8, 2021Capitol Planning Region, Connecticut; Hampden County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 8, 2021, 2:56 PM EDT for Capitol Planning Region, Connecticut; Hampden County, Massachusetts. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 8, 2021, 2:56 PM EDT (18:56 UTC)
Expired: Jun 8, 2021, 3:39 PM EDT
In force: 43 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Capitol Planning Region, CT, Hampden County, MA

The radar

The Albany radar (KENX), 104 km from the middle of the area, began a volume at 18:58 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

Albany, NY (KALY), launched 12:00Z, 6.9 hours before the alert went out and 97 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: 289 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

139 
WUUS51 KBOX 081856
SVRBOX
CTC003-MAC013-082000-
/O.NEW.KBOX.SV.W.0013.210608T1856Z-210608T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
256 PM EDT Tue Jun 8 2021

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  Northwestern Hartford County in northern Connecticut...
  Southwestern Hampden County in western Massachusetts...

* Until 400 PM EDT.

* At 256 PM EDT, a severe thunderstorm was located over Winsted, or 8
  miles north of Torrington, moving northeast at 10 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Suffield, Granby, Southwick, Hartland, Granville, Blandford and
  Tolland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4212 7306 4215 7305 4215 7303 4217 7303
      4220 7301 4202 7273 4196 7289 4197 7289
      4197 7303 4204 7301 4204 7306 4206 7305
      4211 7307
TIME...MOT...LOC 1856Z 223DEG 9KT 4195 7309 

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

Chai

1 follow-up statement

642 
WWUS51 KBOX 081939
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
339 PM EDT Tue Jun 8 2021

CTC003-MAC013-081949-
/O.CAN.KBOX.SV.W.0013.000000T0000Z-210608T2000Z/
Hartford CT-Hampden MA-
339 PM EDT Tue Jun 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HARTFORD AND
SOUTHWESTERN HAMPDEN COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 4212 7306 4215 7305 4215 7303 4217 7303
      4220 7301 4202 7273 4196 7289 4197 7289
      4197 7303 4204 7301 4204 7306 4206 7305
      4211 7307
TIME...MOT...LOC 1938Z 223DEG 9KT 4203 7299 

$$

Chai

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 12:45 PM EDT	Special Weather Statement	BOX		45 min
Jun 8, 12:54 PM EDT	Flash Flood Watch	BOX	Capitol Planning Region	8 hr
Jun 8, 2:10 PM EDT	Special Weather Statement	BOX		50 min
Jun 8, 2:29 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	61 min
Jun 8, 3:24 PM EDT	Special Weather Statement	BOX		51 min
Jun 8, 3:28 PM EDT	Special Weather Statement	BOX		47 min
Jun 8, 4:13 PM EDT	Special Weather Statement	BOX		47 min
Jun 8, 12:35 PM EDT	Special Weather Statement	BOX	Hampshire	40 min
Jun 8, 1:02 PM EDT	Flash Flood Warning	BOX	Hampshire	55 min
Jun 8, 1:13 PM EDT	Special Weather Statement	BOX	Hampden	47 min
Jun 8, 1:34 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	41 min
Jun 8, 1:39 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	67 min
Jun 8, 2:40 PM EDT	Special Weather Statement	BOX	Hampshire	50 min
Jun 8, 3:09 PM EDT	Special Weather Statement	BOX	Worcester	51 min
Jun 8, 3:12 PM EDT	Special Weather Statement	BOX	Essex	48 min
Jun 8, 3:32 PM EDT	Special Marine Warning	BOX		43 min
Jun 8, 3:37 PM EDT	Special Weather Statement	BOX	Hampshire	38 min
Jun 8, 3:42 PM EDT	Special Weather Statement	BOX	Essex	48 min
Jun 8, 3:51 PM EDT	Special Weather Statement	BOX	Hampshire	39 min
Jun 8, 3:52 PM EDT	Special Marine Warning	BOX		53 min
Jun 8, 4:02 PM EDT	Special Weather Statement	BOX	Norfolk	43 min
Jun 8, 4:04 PM EDT	Special Weather Statement	BOX	Hampshire	41 min
Jun 8, 4:13 PM EDT	Special Weather Statement	BOX	Essex	47 min
Jun 8, 4:38 PM EDT	Special Marine Warning	BOX		52 min
Jun 8, 5:17 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Middlesex, Norfolk, Worcester	58 min
Jun 8, 5:33 PM EDT	Special Marine Warning	BOX		42 min
Jun 8, 5:59 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth, Suffolk	35 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2021 Severe Thunderstorm Warnings in Massachusetts, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.