Alert archive / Illinois / Tornado Warnings in 1992

Tornado Warning 5, NWS St. Louis, MO

July 4, 1992Saint Clair County, Illinois

NWS St. Louis, MO issued this tornado warning at Jul 4, 1992, 7:37 PM CDT for Saint Clair County, Illinois. It was in force for 23 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1992, 7:37 PM CDT (00:37 UTC)
Expired
Jul 4, 1992, 8:00 PM CDT
In force
23 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Clair County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 0.6 hours before the alert went out and 189 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 1992-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 742 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, Paducah/Barkley, KY at 00:00Z on 1992-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.193958Sfc1 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
742 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1248 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 050038
TORSTL
ILC163-050100-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
737 PM CDT SAT JUL 4 1992
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ILLINOIS
 
   ...SOUTHERN ST CLAIR COUNTY
 
AT 735 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A POSSIBLE
TORNADO NEAR NEW ATHENS...ILLINOIS...ABOUT 20 MILES SOUTHEAST OF ST
LOUIS. THIS STORM WAS MOVING SOUTHEAST AT 20 MPH. THIS STORM WILL MOVE
NEAR NEW ATHENS AND MARISSA BETWEEN 735 AND 800 PM.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIrECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
TUCKER

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 4, 8:03 PM CDTTornado WarningLSXRandolph, Saint Clair, Washington37 min
Jul 4, 8:10 PM CDTFlash Flood WarningLSXSaint Clair117 min

Nearby

Tornado Warnings in Illinois, 1992Every tornado warning in 1992Tornadoes in 1992

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.