Alert archive / Illinois / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 92, NWS Lincoln, IL

December 14, 1990Macoupin County, Montgomery County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Dec 14, 1990, 10:40 PM CST for Macoupin County, Montgomery County, Illinois. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Dec 14, 1990, 10:40 PM CST (04:40 UTC)
Expired
Dec 14, 1990, 11:15 PM CST
In force
35 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Macoupin County, IL, Montgomery County, IL

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

Paducah/Barkley, KY (KPAH), launched 00:00Z, 4.7 hours before the alert went out and 257 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, Paducah/Barkley, KY at 00:00Z on 1990-12-15Temperature 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, Paducah/Barkley, KY at 00:00Z on 1990-12-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 209 square meters per square second.1939587897117Sfc1 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
757 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
209 m²/s²
0-3 km storm-relative helicity
371 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 KSPI 150440
SVRSPI
ILC117-135-150515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE SPRINGFIELD IL
1040 PM CST FRI DEC 14 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1115 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE CENTRAL PART OF ILLINOIS
      EASTERN MACOUPIN...MONTGOMERY

SEVERE THUNDERSTORMS WERE INDICATED BY RADAR AT 10.30 MP CST FROM
CARLINVILLE TO MEDORA IN MACOUPIN. ESDA REPORTS SOME POWER OUTAGES
BECAUSE OF DAMAGING WINDS. THE THUNDERSTORMS WERE MOVING TOWARD THE
EAST AT AROUND 55 MPH. PERSONS IN THE WARNED AREA SHOULD BE ON THE
ALERT FOR DAMAGING WINDS.

THE THUNDERSTORMS WERE 40 TO 50 MILES SOUTH TO SOUTHWEST OF
SPINGFIELD.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND DANGEROUS LIGHTNING.

 ATTN ISP DIST...18
 FS

Nearby

Severe Thunderstorm Warnings in Illinois, 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.