Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 443, NWS St. Louis, MO

August 24, 2000Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 24, 2000, 12:11 AM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 24, 2000, 12:11 AM CDT (05:11 UTC)
Expired
Aug 24, 2000, 1:00 AM CDT
In force
49 min
Issued by
NWS St. Louis, MO
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Monroe County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 60 km from the middle of the area, began a volume at 05:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 23, 9:45 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.2 hours before the alert went out and 223 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 2000-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1082 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2000-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
1082 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1541 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 240513
SVRSTL
ILC133-163-240600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1211 AM CDT THU AUG 24 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS
  ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 100 AM CDT

* AT 1211 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
A LINE OF SEVERE THUNDERSTORMS ENTERING WESTERN ST. CLAIR AND 
NORTHWEST MONROE COUNTIES IN SOUTHWEST ILLINOIS. THE LINE OF SEVERE 
THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT 45 MPH. 

* LOCATIONS IN THE PATH...
  SWANSEA
  BELLEVILLE
  FAIRVIEW HEIGHTS
  SCOTT AFB
  SHILOH
  O'FALLON
  LEBANON

THESE STORMS HAVE HAD A HISTORY OF PRODUCING DAMAGING WINDS OF 55 TO 
65 MPH.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3865 9019 3825 9036 3823 8973 3865 8975

RP/GKS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 8:25 PM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery50 min
Aug 23, 8:44 PM CDTTornado WarningLSXMontgomery46 min
Aug 23, 9:29 PM CDTTornado WarningLSXMontgomery31 min
Aug 23, 9:43 PM CDTSevere Thunderstorm WarningLSXBond, Fayette62 min
Aug 23, 10:19 PM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery56 min
Aug 23, 10:58 PM CDTSevere Thunderstorm WarningLSXMadison47 min
Aug 23, 11:16 PM CDTSevere Thunderstorm WarningLSXBond, Montgomery59 min
Aug 23, 11:21 PM CDTSevere Thunderstorm WarningLSXCalhoun54 min
Aug 23, 11:28 PM CDTSevere Thunderstorm WarningLSXMacoupin62 min
Aug 23, 11:51 PM CDTSevere Thunderstorm WarningLSXJersey39 min
Aug 24, 12:09 AM CDTSevere Thunderstorm WarningLSXFayette, Marion66 min
Aug 24, 12:27 AM CDTFlash Flood WarningLSXBond, Fayette, Macoupin, Marion, Montgomery6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2000Every severe thunderstorm warning in 2000

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.