Alert archive / Connecticut / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 21, NWS Boston/Norton, MA

June 12, 1991Southeastern Connecticut Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 12, 1991, 4:50 PM EDT for Southeastern Connecticut Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1991, 4:50 PM EDT (20:50 UTC)
Expired
Jun 12, 1991, 5:45 PM EDT
In force
55 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

Counties Northeastern Connecticut Planning Region, CT, Southeastern Connecticut Planning Region, CT

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.8 hours before the alert went out and 172 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 1991-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 1991-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1044 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
108 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.

000 
TTAA00 KBDL 122050
SVRBDL
CTC015-011-122145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARTFORD CT
450 PM EDT WED JUN 12 1991
 
THE NATIONAL WEATHER SERVICE IN HARTFORD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST CONNECTICUT
 
   ...WINDHAM COUNTY
 
IN SOUTHEAST CONNECTICUT
 
   ...NEW LONDON COUNTY
 
AND THE ADJACENT COASTAL WATERS OF LONG ISLAND SOUND.
 
 
THUNDERSTORM WIND GUSTS HAVE KNOCKED DOWN TREES IN WOODSTOCK
CONNECTICUT AT 435 PM. THUNDERSTORMS HAVE HAD IN GUSTS TO 50 MPH OVER
PARTS OF CENTRAL CONNECTICUT. THESE THUNDERSTORMS ARE MOVING EAST TO
SOUTHEAST AT 30 TO 35 MPH AND WILL BE MOVING INTO THE NORWICH
CONNECTICUT AREA BY 530 PM.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
BUDD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 3:33 PM EDTSevere Thunderstorm WarningBOXNorthwest Hills Planning Region57 min
Jun 12, 3:51 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region69 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 1991Every severe thunderstorm warning in 1991

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.