Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 419, NWS St. Louis, MO

August 23, 2000Marion County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 23, 2000, 12:13 AM CDT for Marion County, Illinois. It was in force for 62 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 23, 2000, 12:13 AM CDT (05:13 UTC)
Expired
Aug 23, 2000, 1:15 AM CDT
In force
62 min
Issued by
NWS St. Louis, MO
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Marion County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.2 hours before the alert went out and 160 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 2000-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3363 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 2000-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
3363 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
915 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

775 
WUUS53 KLSX 230513
SVRSTL
ILC121-230615-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1213 AM CDT WED AUG 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARION COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 115 AM CDT

* AT 1213 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES NORTHWEST OF PATOKA...MOVING SOUTHEAST
  AT 40 MPH.

* LOCATIONS IN THE PATH...
  VERNON
  PATOKA
  KINMUNDY
  SALEM
  OMEGA
  STEPHEN FORBES STATE PARK
  HELM

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 3884 8914 3870 8914 3850 8871 3883 8871

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 7:28 PM CDTSevere Thunderstorm WarningLSXAdams62 min
Aug 22, 8:22 PM CDTSevere Thunderstorm WarningLSXBrown, Pike53 min
Aug 22, 9:05 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene55 min
Aug 22, 9:38 PM CDTSevere Thunderstorm WarningLSXMacoupin52 min
Aug 22, 10:20 PM CDTSevere Thunderstorm WarningLSXMontgomery40 min
Aug 22, 10:55 PM CDTSevere Thunderstorm WarningLSXMacoupin35 min
Aug 22, 11:02 PM CDTSevere Thunderstorm WarningLSXFayette, Montgomery43 min
Aug 22, 11:33 PM CDTSevere Thunderstorm WarningLSXBond, Fayette42 min
Aug 23, 6:12 PM CDTSevere Thunderstorm WarningLSXAdams, Brown48 min

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.