Alert archive / Connecticut / Tornado Warnings in 2023

Tornado Warning 5, NWS Boston/Norton, MA

July 29, 2023Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Jul 29, 2023, 7:21 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 24 min. 3 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 29, 2023, 7:21 PM EDT (23:21 UTC)
Expired: Jul 29, 2023, 7:45 PM EDT
In force: 24 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 86 km from the middle of the area, began a volume at 23:22 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 29, 7:35 PM EDT	TSTM WND DMG	2 Ene Willimantic Ap, CT	In Chaplin, there were three reports (two from the public and one from amateur radio) of small branches down along Route 6.
Jul 29, 7:42 PM EDT	TSTM WND DMG	3 Nne Scotland, CT	In Hampton, near the Pomfret line, several trees and wires were down with the fire dept. responding. Report per CT DEMHS. Time approximate based on radar.
Jul 29, 7:55 PM EDT	TSTM WND DMG	2 N Brooklyn, CT	In Brooklyn, a tree was down on the 200 block of Pomfret Road. Time approximate. Report relayed by amateur radio.

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 29, 1:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.4 hours before the alert went out and 117 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: 90 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1183 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

267 
WFUS51 KBOX 292321
TORBOX
CTC013-015-292345-
/O.NEW.KBOX.TO.W.0005.230729T2321Z-230729T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
721 PM EDT Sat Jul 29 2023

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Southwestern Windham County in northern Connecticut...
  East central Tolland County in northern Connecticut...

* Until 745 PM EDT.
    
* At 720 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Mansfield, moving east at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Mansfield, Windham, Canterbury, Chaplin, Hampton and Scotland 
  around 725 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4176 7226 4181 7224 4182 7192 4166 7201
TIME...MOT...LOC 2320Z 279DEG 20KT 4179 7221 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

KP

2 follow-up statements

519 
WWUS51 KBOX 292334
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
734 PM EDT Sat Jul 29 2023

CTC013-015-292345-
/O.CON.KBOX.TO.W.0005.000000T0000Z-230729T2345Z/
Windham CT-Tolland CT-
734 PM EDT Sat Jul 29 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
SOUTHWESTERN WINDHAM AND SOUTHEASTERN TOLLAND COUNTIES...
        
At 733 PM EDT, a confirmed tornado was located over Chaplin, or near
Windham, moving east at 20 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Brooklyn, Canterbury, Pomfret, Hampton and Scotland around 740 PM 
  EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4176 7217 4181 7215 4182 7192 4166 7201
TIME...MOT...LOC 2333Z 276DEG 20KT 4178 7211 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

KP

240 
WWUS51 KBOX 292344
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
744 PM EDT Sat Jul 29 2023

CTC013-015-292354-
/O.EXP.KBOX.TO.W.0005.000000T0000Z-230729T2345Z/
Windham CT-Tolland CT-
744 PM EDT Sat Jul 29 2023

...THE TORNADO WARNING FOR SOUTHWESTERN WINDHAM AND SOUTHEASTERN
TOLLAND COUNTIES WILL EXPIRE AT 745 PM EDT...
    
The Tornado Warning that was previously in effect has been reissued. 
Please refer to that bulletin for the latest severe weather 
information.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern Connecticut.

LAT...LON 4176 7217 4181 7215 4182 7192 4166 7201
TIME...MOT...LOC 2344Z 279DEG 20KT 4177 7205 

$$

KP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:08 AM EDT	Flood Watch	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	19 hr
Jul 29, 1:43 PM EDT	Special Weather Statement	BOX		62 min
Jul 29, 2:38 PM EDT	Special Weather Statement	BOX		67 min
Jul 29, 2:50 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	43 min
Jul 29, 6:35 PM EDT	Special Weather Statement	BOX		85 min
Jul 29, 7:09 PM EDT	Special Weather Statement	BOX		66 min
Jul 29, 7:17 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	58 min
Jul 29, 7:43 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	17 min
Jul 29, 7:59 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	32 min

Nearby

Tornado Warnings in Connecticut, 2023 Every tornado warning in 2023 Tornadoes in 2023

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.