Alert archive / Illinois / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 225, NWS St. Louis, MO

August 26, 1996Macoupin County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 26, 1996, 1:03 PM CDT for Macoupin County, Illinois. It was in force for 27 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
Aug 26, 1996, 1:03 PM CDT (18:03 UTC)
Expired
Aug 26, 1996, 1:30 PM CDT
In force
27 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Macoupin County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.1 hours before the alert went out and 150 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 12:00Z on 1996-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 466 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 12:00Z on 1996-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939Sfc1 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
466 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1100 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
74 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 261806 COR
SVRSTL
ILC117-261830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION TO LOCATION
NATIONAL WEATHER SERVICE ST LOUIS MO
103 PM CDT MON AUG 26 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL ILLINOIS
 
   ...MACOUPIN COUNTY
 
AT 102 PM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
ABOUT 10 MILES WEST OF CARLINVILLE.
 
THIS STORM WAS MOVING EAST-SOUTHEAST AT 20 MPH.  THE TOWNS OF
CARLINVILLE...STANDARD CITY....AND ATWATER ARE IN THE PATH OF THIS
STORM.
 
THIS IS A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEfADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 6:57 PM CDTFlash Flood WarningLSXSaint Clair3 hr

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.