Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Boston/Norton, MA

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

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 5, 2012, 5:46 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Worcester County, Massachusetts. It was in force for 29 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, 5:46 PM EDT (21:46 UTC)
Expired: Aug 5, 2012, 6:15 PM EDT
In force: 29 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Boston radar (KBOX), 86 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 125 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.

791 
WUUS51 KBOX 052146
SVRBOX
CTC003-013-015-MAC027-052215-
/O.NEW.KBOX.SV.W.0075.120805T2146Z-120805T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
546 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...
  SOUTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  SOUTHERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF MANSFIELD...
  NORTHERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...WILLIMANTIC...PUTNAM...

* UNTIL 615 PM EDT

* AT 540 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 CHARLTON AND DUDLEY MASSACHUSETTS TO BOLTON AND BERLIN    
  CONNECTICUT AND WAS MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...OXFORD...AUBURN...
  WEBSTER...COVENTRY...EASTFORD...ANDOVER...WOODSTOCK...ASHFORD...
  SUTTON...MILLBURY...GRAFTON...DOUGLAS...POMFRET...WHITINSVILLE...
  NORTHBRIDGE...THOMPSON...CHAPLIN...MARLBOROUGH...UPTON...COLUMBIA
  AND HEBRON.

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 4171 7262 4200 7209 4220 7198 4222 7162
      4212 7160 4201 7173 4201 7180 4195 7180
      4193 7182 4169 7221 4171 7224 4164 7233
      4163 7266 4161 7271 4159 7294
TIME...MOT...LOC 2145Z 261DEG 31KT 4217 7189 4203 7193
          4173 7245 4163 7273

$$

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, 5:05 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, 5:57 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.