Alert archive / Illinois / Tornado Warnings in 1996

Tornado Warning 16, NWS St. Louis, MO

April 19, 1996Clinton County, Saint Clair County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 19, 1996, 7:32 PM CDT for Clinton County, Saint Clair County, Illinois. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 19, 1996, 7:32 PM CDT (00:32 UTC)
Expired
Apr 19, 1996, 8:15 PM CDT
In force
43 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Clinton County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 89 km from the middle of the area, began a volume at 00:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.5 hours before the alert went out and 202 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, Lincoln, IL at 00:00Z on 1996-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1505 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, Lincoln, IL at 00:00Z on 1996-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 213 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
1505 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
765 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
213 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
2.4
Supercell composite
11.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 200034
TORSTL
ILC027-163-200115-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
732 PM CDT FRI APR 19 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL ILLINOIS
 
   ...CLINTON COUNTY
 
IN SOUTHWEST ILLINOIS
 
   ...NORTHEASTERN ST. CLAIR COUNTY
 
AT 732 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS DETECTING A
TORNADO NEAR LEBANON. IT WAS MOVING EAST AT 40 MPH. IT WILL MOVE THROUGH
THE TOWNS OF TRENTON...ST ROSE...JAMESTOWN.
 
IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IN A BASEMENT
OR INTERIOR ROOM ON THE LOWEST LEVEL.
 
GKS
 6

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 7:03 PM CDTSevere Thunderstorm WarningLSXSaint Clair42 min
Apr 19, 7:33 PM CDTTornado WarningLSXRandolph42 min
Apr 19, 7:49 PM CDTTornado WarningLSXMarion41 min
Apr 19, 8:04 PM CDTTornado WarningLSXRandolph, Washington41 min
Apr 19, 8:24 PM CDTTornado WarningLSXFayette, Marion51 min
Apr 19, 8:45 PM CDTTornado WarningLSXWashington30 min
Apr 19, 8:51 PM CDTSevere Thunderstorm WarningLSXClinton, Saint Clair54 min

Nearby

Tornado Warnings in Illinois, 1996Every tornado warning in 1996Tornadoes in 1996

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; radar from the NEXRAD Level II archive.