Alert archive / Connecticut / Tornado Warnings in 2019

Tornado Warning 9, NWS Boston/Norton, MA

August 21, 2019Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Aug 21, 2019, 5:54 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 51 min. 5 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: Aug 21, 2019, 5:54 PM EDT (21:54 UTC)
Expired: Aug 21, 2019, 6:45 PM EDT
In force: 51 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 103 km from the middle of the area, began a volume at 21:54 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
Aug 21, 6:05 PM EDT	TSTM WND DMG	1 S Manchester, CT	TREE DOWN ON BISSELL STREET. WIRES DOWN ON SPRUCE AT BISSELL STREET.
Aug 21, 6:05 PM EDT	TSTM WND DMG	1 S Manchester, CT	TREE DOWN ON HOUSE ON PEARL STREET.
Aug 21, 6:05 PM EDT	TSTM WND DMG	1 Wnw Highland Park, CT	BRANCH DOWN ON WIRES ON CLINTON STREET IN MANCHESTER CT.
Aug 21, 6:05 PM EDT	TSTM WND DMG	1 Wnw Highland Park, CT	LARGE BRANCHES DOWN ON WIRES ON FLORENCE STREET IN MANCHESTER CT.
Aug 21, 6:05 PM EDT	TSTM WND DMG	Manchester, CT	POWER LINES DOWN ON SUMMIT STREET.

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
Aug 21, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.9 hours before the alert went out and 103 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: 2157 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

590 
WFUS51 KBOX 212154
TORBOX
CTC003-013-015-212245-
/O.NEW.KBOX.TO.W.0009.190821T2154Z-190821T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
554 PM EDT Wed Aug 21 2019

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Southwestern Windham County in northern Connecticut...
  Central Tolland County in northern Connecticut...
  Southeastern Hartford County in northern Connecticut...

* Until 645 PM EDT.
    
* At 554 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Glastonbury, 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...
  Manchester and Bolton around 605 PM EDT.
  Hebron around 610 PM EDT.
  Vernon around 615 PM EDT.
  Columbia and Andover around 620 PM EDT.
  Willimantic and Coventry around 625 PM EDT.
  Mansfield and Tolland around 630 PM EDT.
  Windham around 635 PM EDT.
  Chaplin around 645 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 4165 7260 4173 7264 4189 7226 4175 7214
TIME...MOT...LOC 2154Z 247DEG 24KT 4171 7255 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
Field

1 follow-up statement

099 
WWUS51 KBOX 212210
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
610 PM EDT Wed Aug 21 2019

CTC003-013-015-212245-
/O.CON.KBOX.TO.W.0009.000000T0000Z-190821T2245Z/
Windham CT-Tolland CT-Hartford CT-
610 PM EDT Wed Aug 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
SOUTHWESTERN WINDHAM...CENTRAL TOLLAND AND EAST CENTRAL HARTFORD
COUNTIES...
    
At 609 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Bolton, or near Manchester, moving northeast at 30
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...
  Columbia around 620 PM EDT.
  Coventry around 625 PM EDT.
  Mansfield and Tolland around 630 PM EDT.
  Windham around 635 PM EDT.
  Chaplin around 645 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 4168 7247 4176 7251 4189 7226 4175 7214
TIME...MOT...LOC 2209Z 247DEG 24KT 4175 7242 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
Field

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 12:59 PM EDT	Special Weather Statement	BOX		61 min
Aug 21, 1:25 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	65 min
Aug 21, 2:26 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	43 min
Aug 21, 2:57 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	38 min
Aug 21, 5:34 PM EDT	Special Weather Statement	BOX		41 min
Aug 21, 5:47 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	58 min
Aug 21, 6:34 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	56 min
Aug 21, 6:42 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	33 min
Aug 21, 6:45 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	30 min
Aug 21, 6:48 PM EDT	Tornado Warning	BOX	Capitol Planning Region	42 min
Aug 21, 7:14 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	38 min

Nearby

Tornado Warnings in Connecticut, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.