Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS Boston/Norton, MA

August 5, 2012Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 5, 2012, 4:58 PM EDT for Capitol Planning Region, Connecticut. It was in force for 47 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: Aug 5, 2012, 4:58 PM EDT (20:58 UTC)
Expired: Aug 5, 2012, 5:45 PM EDT
In force: 47 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 86 km from the middle of the area, began a volume at 21:00 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, 9.0 hours before the alert went out and 86 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: 2201 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

591 
WUUS51 KBOX 052058
SVRBOX
CTC003-013-052145-
/O.NEW.KBOX.SV.W.0073.120805T2058Z-120805T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
458 PM EDT SUN AUG 5 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...WEST HARTFORD...NEWINGTON...NEW
  BRITAIN...MANCHESTER...HARTFORD...EAST HARTFORD...BRISTOL...
  WEST CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 545 PM EDT

* AT 453 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM AVON TO WATERBURY...AND WERE MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...PLAINVILLE...FARMINGTON...
  SOUTHINGTON...WETHERSFIELD...BERLIN...GLASTONBURY AND ROCKY HILL.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4180 7301 4181 7247 4164 7255 4162 7271
      4161 7271 4157 7276 4157 7279 4155 7282
      4156 7284 4154 7285 4156 7288 4156 7295
      4164 7294 4164 7299 4177 7302
TIME...MOT...LOC 2057Z 264DEG 21KT 4178 7285 4158 7308

$$

WTB

1 follow-up statement

563 
WWUS51 KBOX 052132
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
532 PM EDT SUN AUG 5 2012

CTC003-013-052145-
/O.CON.KBOX.SV.W.0073.000000T0000Z-120805T2145Z/
HARTFORD CT-TOLLAND CT-
532 PM EDT SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL TOLLAND AND SOUTHERN HARTFORD COUNTIES...

AT 527 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM EAST HARTFORD TO SOUTHINGTON...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WETHERSFIELD...BERLIN...MANCHESTER...GLASTONBURY AND ROCKY HILL

LAT...LON 4180 7301 4181 7247 4164 7255 4162 7271
      4161 7271 4157 7276 4157 7279 4155 7282
      4156 7284 4154 7285 4156 7288 4156 7295
      4164 7294 4164 7299 4177 7302
TIME...MOT...LOC 2132Z 264DEG 21KT 4180 7258 4160 7281

$$

WTB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 4:03 AM EDT	Flash Flood Watch	BOX	Capitol Planning Region	19 hr
Aug 5, 2:02 PM EDT	Special Weather Statement	BOX		58 min
Aug 5, 2:29 PM EDT	Special Weather Statement	BOX		61 min
Aug 5, 3:33 PM EDT	Special Weather Statement	BOX		57 min
Aug 5, 4:20 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	40 min
Aug 5, 5:05 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	40 min
Aug 5, 5:13 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr
Aug 5, 5:46 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	29 min
Aug 5, 5:57 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	3 hr
Aug 5, 6:30 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	18 min
Aug 5, 7:52 PM EDT	Special Weather Statement	BOX		83 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012 Every severe thunderstorm warning in 2012

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.