Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS New York, NY

July 6, 2021Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Jul 6, 2021, 5:35 PM EDT for Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut. It was in force for 40 min. 2 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 6, 2021, 5:35 PM EDT (21:35 UTC)
Expired: Jul 6, 2021, 6:15 PM EDT
In force: 40 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lower Connecticut River Valley Planning Region, CT, Southeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 96 km from the middle of the area, began a volume at 21:36 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 6, 5:40 PM EDT	TSTM WND DMG	Cromwell, CT	POLICE REPORT SEVERAL TREES DOWN AROUND THE TOWN.
Jul 6, 5:45 PM EDT	TSTM WND DMG	1 Nnw East Hampton, CT	POLICE REPORT TREES AND POWER LINES DOWN.

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 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.6 hours before the alert went out and 96 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: 230 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1202 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

178 
WUUS51 KOKX 062135
SVROKX
CTC007-011-062215-
/O.NEW.KOKX.SV.W.0035.210706T2135Z-210706T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
535 PM EDT Tue Jul 6 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Northwestern New London County in southern Connecticut...
  Northern Middlesex County in southern Connecticut...

* Until 615 PM EDT.

* At 534 PM EDT, a severe thunderstorm was located near Glastonbury,
  moving east at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Jewett City, Middletown, Norwich, Colchester, East Hampton, Salem,
  Ledyard, Cromwell, Griswold, Portland, East Haddam, Lebanon,
  Preston, Lisbon and Sprague.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4166 7216 4166 7213 4163 7195 4142 7201
      4158 7270 4163 7269 4165 7250 4158 7247
      4160 7241 4159 7239 4160 7238 4161 7233
      4164 7233 4167 7227 4169 7227 4171 7224
TIME...MOT...LOC 2134Z 281DEG 30KT 4166 7259 

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

Goodman

1 follow-up statement

195 
WWUS51 KOKX 062207
SVSOKX

Severe Weather Statement
National Weather Service New York NY
607 PM EDT Tue Jul 6 2021

CTC007-011-062216-
/O.EXP.KOKX.SV.W.0035.000000T0000Z-210706T2215Z/
New London CT-Middlesex CT-
607 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NEW LONDON AND
NORTHERN MIDDLESEX COUNTIES WILL EXPIRE AT 615 PM EDT...
                
The storm which prompted the warning has weakened and no longer 
poses an immediate threat to life or property, so the warning will 
be allowed to expire. However gusty winds up to 40 mph are still 
likely. 

A Severe Thunderstorm Watch remains in effect until 10 PM. 

LAT...LON 4166 7216 4166 7213 4163 7195 4142 7201
      4158 7270 4163 7269 4165 7250 4158 7247
      4160 7241 4159 7239 4160 7238 4161 7233
      4164 7233 4167 7227 4169 7227 4171 7224
TIME...MOT...LOC 2206Z 274DEG 75KT 4161 7208 

$$

Goodman

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 4:54 PM EDT	Special Weather Statement	OKX		51 min
Jul 6, 5:49 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	56 min
Jul 6, 6:28 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	47 min
Jul 6, 6:32 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	27 min
Jul 6, 6:48 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	3 hr

Nearby

Severe Thunderstorm Warnings in Connecticut, 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.