Alert archive / Connecticut / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 4, NWS Boston/Norton, MA

August 13, 1990Northwest Hills Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 13, 1990, 8:05 PM EDT for Northwest Hills Planning Region, Connecticut. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Aug 13, 1990, 8:05 PM EDT (00:05 UTC)
Expired
Aug 13, 1990, 9:00 PM EDT
In force
55 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Northwest Hills Planning Region, CT

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Albany, NY (KALB), launched 00:00Z, 0.1 hours before the alert went out and 106 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, Albany, NY at 00:00Z on 1990-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 921 joules per kilogram.LCLLFCEL10008507005003002001001 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, Albany, NY at 00:00Z on 1990-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 192 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
921 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
963 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
270 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBDL 140009
SVRBDL
CTC005-140100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARTFORD CT
805 PM EDT MON AUG 13 1990
 
THE NATIONAL WEATHER SERVICE IN HARTFORD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST CONNECTICUT
 
   ...LITCHFIELD COUNTY
 
AT 800 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN WINDSOR LOCKS
INDICATE A SEVERE THUNDERSTORM MOVING INTO LITCHFIELD COUNTY IN
CONNECTICUT.  IT IS MOVING TO THE EAST AT 35 MILE AN HOUR.
 
THIS THUNDERSTORM IS ACCOMPANIED BY VERY HEAVY RAIN...FREQUENT AND
VIVID LIGHTNING...DAMAGING WINDS...AND POSSIBLE HAIL.  IT WILL MOVE
ACROSS THE COUNTY IN THE NEXT HOUR.
 
IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY AND ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE
OFFICE.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

Nearby

Severe Thunderstorm Warnings in Connecticut, 1990Every severe thunderstorm warning in 1990

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.