Alert archive / Illinois / Tornado Warnings in 1990

Tornado Warning 1, NWS St. Louis, MO

May 12, 1990Jersey County, Illinois

NWS St. Louis, MO issued this tornado warning at May 12, 1990, 5:21 PM CDT for Jersey County, Illinois. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
May 12, 1990, 5:21 PM CDT (22:21 UTC)
Expired
May 12, 1990, 6:00 PM CDT
In force
39 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Jersey 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 12:00Z, 10.4 hours before the alert went out and 267 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 12:00Z on 1990-05-12Temperature 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, Paducah/Barkley, KY at 12:00Z on 1990-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 474 square meters per square second.1939587897Sfc1 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
1113 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
474 m²/s²
0-3 km storm-relative helicity
601 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 KSTL 122225
TORSTL
ILC083-122300-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
521 PM CDT SAT MAY 12 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST ILLINOIS
          ...JERSEY
 
A TORNADO WAS REPORTED ON THE GROUND AT BRUSSELS IN SOUTHERN CALHOUN
COUNTY OF SOUTHWEST ILLINOIS. THE TORNADO WAS MOVING EAST AT 50 MPH.
PERSONS IN THE CITY OF JERSEYVILLE SHOULD TAKE COVER IMMEDIATELY.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE 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.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 4:41 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey49 min
May 12, 5:57 PM CDTSevere Thunderstorm WarningLSXMonroe48 min
May 12, 5:57 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair48 min
May 12, 6:13 PM CDTSevere Thunderstorm WarningLSXBond, Fayette47 min
May 12, 6:50 PM CDTSevere Thunderstorm WarningLSXEffingham40 min

Nearby

Tornado Warnings in Illinois, 1990Every tornado warning in 1990Tornadoes 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.