Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 74, NWS Boston/Norton, MA

August 5, 2012Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 5, 2012, 5:05 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Hampden County, Worcester County, Massachusetts. It was in force for 40 min. 1 report 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 5, 2012, 5:05 PM EDT (21:05 UTC)
Expired: Aug 5, 2012, 5:45 PM EDT
In force: 40 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Hampden County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 88 km from the middle of the area, began a volume at 21:06 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 5, 5:42 PM EDT	TSTM WND DMG	Brimfield, MA	TREE DOWN ON BATTERY AVE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 137 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.

936 
WUUS51 KBOX 052105
SVRBOX
CTC003-013-015-MAC013-027-052145-
/O.NEW.KBOX.SV.W.0074.120805T2105Z-120805T2145Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  EAST CENTRAL HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF MANCHESTER...
  TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...VERNON...MANSFIELD...
  NORTHERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF PUTNAM...
  SOUTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 545 PM EDT

* AT 502 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 SPRINGFIELD AND SOMERS TO MANCHESTER...AND WERE MOVING EAST   
  AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...STAFFORD...TOLLAND...
  MONSON...WALES...BOLTON...HOLLAND...UNION...WILLINGTON...
  BRIMFIELD...COVENTRY...STURBRIDGE...SOUTHBRIDGE...EASTFORD...
  ASHFORD...WOODSTOCK...DUDLEY...WEBSTER...THOMPSON...POMFRET AND
  CHAPLIN.

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 4213 7194 4208 7184 4194 7185 4176 7211
      4177 7267 4194 7247 4206 7246 4213 7252
TIME...MOT...LOC 2104Z 268DEG 32KT 4212 7247 4206 7238
          4194 7239 4180 7260

$$

WTB

1 follow-up statement

863 
WWUS51 KBOX 052133
SVSBOX

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

CTC003-013-015-MAC013-027-052145-
/O.CON.KBOX.SV.W.0074.000000T0000Z-120805T2145Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-WORCESTER MA-HAMPDEN MA-
533 PM EDT SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN HAMPDEN...SOUTH CENTRAL WORCESTER...NORTHERN
WINDHAM...TOLLAND AND EAST CENTRAL HARTFORD COUNTIES...

AT 532 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 BRIMFIELD AND SOUTHBRIDGE TO EASTFORD AND 
STORRS...AND WERE MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
STURBRIDGE...ASHFORD...WOODSTOCK...DUDLEY...WEBSTER...THOMPSON...
POMFRET AND CHAPLIN

LAT...LON 4213 7194 4208 7184 4194 7185 4176 7211
      4177 7267 4194 7247 4206 7246 4213 7252
TIME...MOT...LOC 2133Z 268DEG 32KT 4213 7212 4207 7203
          4195 7204 4181 7225

$$

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, 4:58 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	47 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
Aug 5, 4:08 AM EDT	Small Craft Advisory	BOX		27 hr
Aug 5, 3:03 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Worcester	42 min
Aug 5, 4:38 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	47 min
Aug 5, 5:30 PM EDT	Special Marine Warning	BOX		51 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012 Severe Thunderstorm Warnings in Massachusetts, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.