Alert archive / Connecticut / Tornado Warnings in 2019

Tornado Warning 11, NWS Boston/Norton, MA

September 4, 2019Capitol Planning Region, Connecticut; Hampden County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Sep 4, 2019, 4:53 PM EDT for Capitol Planning Region, Connecticut; Hampden County, Massachusetts. It was in force for 37 min. 6 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: Sep 4, 2019, 4:53 PM EDT (20:53 UTC)
Expired: Sep 4, 2019, 5:30 PM EDT
In force: 37 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Capitol Planning Region, CT, Hampden County, MA

The radar

The Brookhaven radar (KOKX), 122 km from the middle of the area, began a volume at 20:51 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
Sep 4, 5:10 PM EDT	TSTM WND DMG	Enfield, CT	POWER LINES DOWN SOUTH ROAD AT PHOENIX AVE
Sep 4, 5:10 PM EDT	HAIL 0.75	Enfield, CT
Sep 4, 5:31 PM EDT	HAIL 1	Ellington, CT	CRYSTAL LAKE VILLAGE
Sep 4, 5:35 PM EDT	TSTM WND DMG	Vernon, CT	TREE AND WIRES DOWN ON HIGH STREET AND TRACY DRIVE
Sep 4, 5:35 PM EDT	TSTM WND DMG	Vernon, CT	TREE DOWN BLOCKING TOWER ROAD
Sep 4, 5:35 PM EDT	TSTM WND DMG	Vernon, CT	TREES AND WIRES DOWN ON PROSPECT 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
Sep 4, 12:53 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 122 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: 17 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

162 
WFUS51 KBOX 042053
TORBOX
CTC003-013-MAC013-042130-
/O.NEW.KBOX.TO.W.0011.190904T2053Z-190904T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
453 PM EDT Wed Sep 4 2019

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Northwestern Tolland County in northern Connecticut...
  Northeastern Hartford County in northern Connecticut...
  South central Hampden County in western Massachusetts...

* Until 530 PM EDT.
    
* At 452 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Granby, or 7 miles southwest of Agawam, moving
  east at 30 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Suffield around 500 PM EDT.
  Windsor, Longmeadow and Windsor Locks around 510 PM EDT.
  Enfield and Somers around 515 PM EDT.
  East Windsor around 520 PM EDT.
  South Windsor around 525 PM EDT.
  Manchester, Vernon and Ellington around 530 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 4193 7285 4207 7279 4202 7239 4180 7248
TIME...MOT...LOC 2052Z 290DEG 24KT 4199 7276 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Loconto

3 follow-up statements

115 
WWUS51 KBOX 042105
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
505 PM EDT Wed Sep 4 2019

MAC013-042115-
/O.CAN.KBOX.TO.W.0011.000000T0000Z-190904T2130Z/
Hampden MA-
505 PM EDT Wed Sep 4 2019

...THE TORNADO WARNING FOR SOUTH CENTRAL HAMPDEN COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

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

LAT...LON 4203 7267 4202 7239 4180 7248 4190 7277
TIME...MOT...LOC 2105Z 290DEG 24KT 4196 7265 

$$

CTC003-013-042130-
/O.CON.KBOX.TO.W.0011.000000T0000Z-190904T2130Z/
Tolland CT-Hartford CT-
505 PM EDT Wed Sep 4 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHWESTERN TOLLAND AND NORTHEASTERN HARTFORD COUNTIES...
    
At 505 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Windsor Locks, or near Enfield, moving east at 30
mph.

HAZARD...Tornado and quarter size hail.

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...
  Longmeadow around 510 PM EDT.
  Enfield and Somers around 515 PM EDT.
  East Windsor around 520 PM EDT.
  South Windsor around 525 PM EDT.
  Manchester, Vernon and Ellington around 530 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 4203 7267 4202 7239 4180 7248 4190 7277
TIME...MOT...LOC 2105Z 290DEG 24KT 4196 7265 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Loconto

684 
WWUS51 KBOX 042120
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
520 PM EDT Wed Sep 4 2019

CTC003-013-042130-
/O.CON.KBOX.TO.W.0011.000000T0000Z-190904T2130Z/
Tolland CT-Hartford CT-
520 PM EDT Wed Sep 4 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHWESTERN TOLLAND AND NORTHEASTERN HARTFORD COUNTIES...
    
At 519 PM EDT, a severe thunderstorm capable of producing a tornado
was located over East Windsor, or near Vernon, moving southeast at 30
mph.

HAZARD...Tornado and half dollar size hail.

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...
  Ellington around 525 PM EDT.
  Vernon around 530 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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4201 7257 4199 7241 4180 7248 4190 7268
TIME...MOT...LOC 2119Z 297DEG 28KT 4190 7251 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Loconto

707 
WWUS51 KBOX 042127
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
527 PM EDT Wed Sep 4 2019

CTC003-013-042136-
/O.EXP.KBOX.TO.W.0011.000000T0000Z-190904T2130Z/
Tolland CT-Hartford CT-
527 PM EDT Wed Sep 4 2019

...THE TORNADO WARNING FOR NORTHWESTERN TOLLAND AND NORTHEASTERN
HARTFORD COUNTIES WILL EXPIRE AT 530 PM EDT...
    
The Tornado Warning that was previously in effect has been reissued 
for northeastern Hartford and northwestern Tolland Counties and is 
in effect until 545 PM. 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.

Remember, a Tornado Warning still remains in effect for northeastern 
Hartford and northwestern Tolland Counties until 545 PM. 


LAT...LON 4201 7257 4199 7241 4180 7248 4190 7268
TIME...MOT...LOC 2126Z 290DEG 24KT 4190 7252 

$$

Loconto

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 4:17 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	58 min
Sep 4, 5:13 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	62 min
Sep 4, 5:22 PM EDT	Tornado Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	23 min
Sep 4, 5:43 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	32 min
Sep 4, 6:11 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	49 min
Sep 4, 3:09 PM EDT	Special Weather Statement	BOX	Franklin	51 min
Sep 4, 3:58 PM EDT	Special Weather Statement	BOX	Franklin	47 min
Sep 4, 4:12 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	48 min
Sep 4, 5:23 PM EDT	Special Weather Statement	BOX	Middlesex	37 min
Sep 4, 6:18 PM EDT	Special Weather Statement	BOX	Suffolk	57 min
Sep 4, 6:39 PM EDT	Special Marine Warning	BOX		66 min
Sep 4, 6:59 PM EDT	Special Marine Warning	BOX		46 min

Nearby

Tornado Warnings in Connecticut, 2019 Tornado Warnings in Massachusetts, 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.