Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS New York, NY

July 16, 2021Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Jul 16, 2021, 5:26 PM EDT for Southeastern Connecticut Planning Region, Connecticut. It was in force for 49 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: Jul 16, 2021, 5:26 PM EDT (21:26 UTC)
Expired: Jul 16, 2021, 6:15 PM EDT
In force: 49 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Southeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 97 km from the middle of the area, began a volume at 21:30 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

Brookhaven, NY (KOKX), launched 12:00Z, 9.4 hours before the alert went out and 101 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: 1044 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

788 
WUUS51 KOKX 162126
SVROKX
CTC011-162215-
/O.NEW.KOKX.SV.W.0052.210716T2126Z-210716T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
526 PM EDT Fri Jul 16 2021

The National Weather Service in Upton NY has issued a

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

* Until 615 PM EDT.

* At 525 PM EDT, a severe thunderstorm was located over Andover, or 8
  miles southeast of Manchester, moving east at 20 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Colchester around 540 PM EDT.
  Lebanon and Bozrah around 605 PM EDT.
  Sprague around 610 PM EDT.
  Norwich, Preston and Lisbon around 615 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4166 7216 4166 7213 4164 7197 4147 7206
      4160 7237 4160 7234 4161 7233 4164 7233
      4167 7227 4169 7227 4170 7225 4171 7224
TIME...MOT...LOC 2125Z 291DEG 17KT 4171 7238 

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

Goodman

2 follow-up statements

167 
WWUS51 KOKX 162148
SVSOKX

Severe Weather Statement
National Weather Service New York NY
548 PM EDT Fri Jul 16 2021

CTC011-162215-
/O.CON.KOKX.SV.W.0052.000000T0000Z-210716T2215Z/
New London CT-
548 PM EDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN NEW LONDON COUNTY...

At 548 PM EDT, a severe thunderstorm was located over Lebanon, or
near Windham, moving southeast at 20 mph.

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

SOURCE...Radar indicated.

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

This severe storm will be near...
  Bozrah around 605 PM EDT.
  Sprague around 610 PM EDT.
  Norwich around 625 PM EDT.
  Preston and Lisbon around 630 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading 
killers. If you can hear thunder, you are close enough to the storm 
to be struck by lightning. 

&&

LAT...LON 4166 7216 4166 7213 4164 7197 4147 7206
      4160 7237 4160 7234 4161 7233 4164 7233
      4167 7227 4169 7227 4171 7224
TIME...MOT...LOC 2148Z 296DEG 16KT 4166 7226 

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

Goodman

382 
WWUS51 KOKX 162208
SVSOKX

Severe Weather Statement
National Weather Service New York NY
608 PM EDT Fri Jul 16 2021

CTC011-162217-
/O.EXP.KOKX.SV.W.0052.000000T0000Z-210716T2215Z/
New London CT-
608 PM EDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NEW LONDON COUNTY
WILL EXPIRE AT 615 PM EDT...
                
The storm which prompted the warning is weakening, but may still be 
capable of producing gusty winds. 

LAT...LON 4166 7216 4166 7213 4164 7197 4147 7206
      4160 7237 4160 7234 4161 7233 4164 7233
      4167 7227 4169 7227 4171 7224
TIME...MOT...LOC 2207Z 318DEG 10KT 4161 7225 

$$

Goodman

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 2:43 PM EDT	Flash Flood Watch	OKX	Greater Bridgeport Planning Region	37 hr
Jul 16, 5:32 PM EDT	Special Weather Statement	OKX		43 min
Jul 16, 6:04 PM EDT	Special Weather Statement	OKX		41 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.