Alert archive / Illinois / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 208, NWS St. Louis, MO

July 28, 1996Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 28, 1996, 11:45 PM CDT for Saint Clair County, Illinois. It was in force for 60 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
Jul 28, 1996, 11:45 PM CDT (04:45 UTC)
Expired
Jul 29, 1996, 12:45 AM CDT
In force
60 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Clair County, IL

The radar

The St Louis radar (KLSX), 70 km from the middle of the area, began a volume at 04:48 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, 4.8 hours before the alert went out and 219 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 1996-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 379 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 1996-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
379 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
958 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 290446
SVRSTL
ILC163-290545-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1145 PM CDT SUN JUL 28 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ILLINOIS
 
   ...ST. CLAIR COUNTY
 
AT 1143 PM CDT...NWS DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER
CENTRAL ST. CLAIR COUNTY JUST EAST OF MILSTAD ILLINOIS. THIS STORM
IS MOVING SOUTHEAST AND WILL MOVE THROUGH THE TOWNS OF FREEBURG AND
SMITHTON.
 
THIS SEVERE THUNDERSTORM WARNING EXPANDS THE CURRENT SEVERE THUNDERSTORM
WARNING FOR ST. CLAIR COUNTY.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
AS/RP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 8:40 PM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery50 min
Jul 28, 9:25 PM CDTSevere Thunderstorm WarningLSXSaint Clair50 min
Jul 28, 10:14 PM CDTSevere Thunderstorm WarningLSXSaint Clair46 min
Jul 28, 10:57 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair63 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1996Every severe thunderstorm warning 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.