Alert archive / Connecticut / Tornado Warnings in 2019

Tornado Warning 13, NWS Boston/Norton, MA

September 4, 2019Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Sep 4, 2019, 5:43 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 32 min. 8 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, 5:43 PM EDT (21:43 UTC)
Expired: Sep 4, 2019, 6:15 PM EDT
In force: 32 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 93 km from the middle of the area, began a volume at 21:42 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, 5:44 PM EDT	HAIL 1	Willington, CT
Sep 4, 5:45 PM EDT	TSTM WND DMG	1 Wsw Merrow, CT	TREE AND WIRES DOWN ON MERROW ROAD IN COVENTRY CT.
Sep 4, 5:45 PM EDT	TSTM WND DMG	2 W Merrow, CT	APPROXIMATELY 100 TREES DOWNED AT THE SKUNGAMAUG RIVER GOLF CLUB ON FOLLY LANE IN COVENTRY CT
Sep 4, 5:54 PM EDT	TSTM WND DMG	Mansfield, CT	TREE AND WIRES DOWN ON RTE 32
Sep 4, 5:54 PM EDT	TSTM WND DMG	Mansfield, CT	TREE BRANCHES AND WIRES DOWN ON PLAINS ROAD
Sep 4, 5:54 PM EDT	TSTM WND DMG	Mansfield, CT	TREE BRANCHES AND WIRES DOWN ON PLAINS ROAD AND RAVINE ROAD
Sep 4, 5:54 PM EDT	TSTM WND DMG	Mansfield Depot, CT	AT A DAYCARE CENTER ON DEPOT ROAD A LARGE TREE WAS DOWNED AND A SIGN THAT WAS MOUNTED IN THE GROUND SNAPPED.
Sep 4, 5:54 PM EDT	TSTM WND DMG	Mansfield Depot, CT	CORN WAS FLATTENED IN A CORN FIELD NEAR THE INTERSECTION OF PLAINS AND STAFFORD ROADS.

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, 9.7 hours before the alert went out and 115 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.

428 
WFUS51 KBOX 042143
TORBOX
CTC013-015-042215-
/O.NEW.KBOX.TO.W.0013.190904T2143Z-190904T2215Z/

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

* Until 615 PM EDT.
    
* At 543 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Coventry, or near Mansfield, moving east 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...
  Mansfield around 550 PM EDT.
  Willimantic around 555 PM EDT.
  Windham around 600 PM EDT.
  Chaplin around 605 PM EDT.
  Hampton around 610 PM EDT.
  Scotland around 615 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 4191 7234 4185 7199 4168 7210 4169 7221
      4171 7224 4171 7225 4180 7243
TIME...MOT...LOC 2143Z 290DEG 25KT 4183 7231 

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

$$

Loconto

2 follow-up statements

392 
WWUS51 KBOX 042200
SVSBOX

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

CTC013-015-042215-
/O.CON.KBOX.TO.W.0013.000000T0000Z-190904T2215Z/
Windham CT-Tolland CT-
600 PM EDT Wed Sep 4 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
SOUTHWESTERN WINDHAM AND EAST CENTRAL TOLLAND COUNTIES...
    
At 559 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Chaplin, or near Mansfield, 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...
  Hampton around 610 PM EDT.
  Scotland around 615 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 4188 7223 4185 7199 4168 7210 4169 7221
      4171 7224 4171 7225 4174 7229 4172 7227
      4176 7234
TIME...MOT...LOC 2159Z 290DEG 25KT 4179 7216 

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

$$

Loconto

761 
WWUS51 KBOX 042214
SVSBOX

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

CTC013-015-042224-
/O.EXP.KBOX.TO.W.0013.000000T0000Z-190904T2215Z/
Windham CT-Tolland CT-
614 PM EDT Wed Sep 4 2019

...THE TORNADO WARNING FOR SOUTHWESTERN WINDHAM AND EAST CENTRAL
TOLLAND COUNTIES WILL EXPIRE AT 615 PM EDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

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

LAT...LON 4188 7223 4185 7199 4168 7210 4169 7221
      4171 7224 4171 7225 4174 7229 4172 7227
      4176 7234
TIME...MOT...LOC 2214Z 290DEG 25KT 4177 7210 

$$

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, 4:53 PM EDT	Tornado Warning	BOX	Capitol Planning Region	37 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, 6:11 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	49 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.