Alert archive / Connecticut / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 9, NWS Boston/Norton, MA

October 18, 1990Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Oct 18, 1990, 9:32 PM EDT for Capitol Planning Region, Connecticut. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Oct 18, 1990, 9:32 PM EDT (01:32 UTC)
Expired
Oct 18, 1990, 10:15 PM EDT
In force
43 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Capitol 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

Chatham, MA (KCHH), launched 00:00Z, 1.5 hours before the alert went out and 217 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 00:00Z on 1990-10-19Temperature 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 00:00Z on 1990-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
1118 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
172 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 190133
SVRBDL
CTC003-190215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARTFORD CT
932 PM EDT THU OCT 18 1990
 
THE NATIONAL WEATHER SERVICE IN HARTFORD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL CONNECTICUT
 
   ...NORTHERN HARTFORD COUNTY
 
A LINE OF THUNDERSTORMS ARE MOVING THROUGH NORTHERN HARTFORD COUNTY.
THESE THUNDERSTORMS ARE MOVING TO EAST AT 45 MILE AN 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 SERVICEa
OFFICE.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 18, 9:49 PM EDTSevere Thunderstorm WarningBOX41 min

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.