Alert archive / Illinois / Tornado Warnings in 2000

Tornado Warning 49, NWS St. Louis, MO

August 23, 2000Montgomery County, Illinois

NWS St. Louis, MO issued this tornado warning at Aug 23, 2000, 8:44 PM CDT for Montgomery County, Illinois. It was in force for 46 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 23, 2000, 8:44 PM CDT (01:44 UTC)
Expired
Aug 23, 2000, 9:30 PM CDT
In force
46 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Montgomery County, IL

What was reported inside it

TimeReportWhereRemark
Aug 23, 9:10 PM CDTHail 0.88Witt, IL
Aug 23, 9:20 PM CDTHail 2.75Irving, IL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.7 hours before the alert went out and 127 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2000-08-24The 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 
WFUS53 KLSX 240144
TORSTL

ILC135-240230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
844 PM CDT WED AUG 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  MONTGOMERY COUNTY IN CENTRAL ILLINOIS

* UNTIL 930 PM CDT

* AT 844 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR RAYMOND...MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE PATH...
  RAYMOND
  HONEY BEND
  BUTLER
  HILLSBORO
  IRVING
  FILLMORE
  CHAPMAN
  COFFEEN

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW! A BASEMENT
OFFERS THE BEST PROTECTION. IF A BASEMENT IS NOT AVAILABLE...MOVE TO
THE LOWEST FLOOR AND SEEK SHELTER IN A SMALL INTERIOR ROOM. STAY AWAY
FROM OUTSIDE WALLS AND WINDOWS. MOBILE HOMES SHOULD BE ABANDONED IN
FAVOR OF A MORE SUBSTANTIAL STRUCTURE. DO NOT TRY TO OUTRUN A TORNADO
IN A VEHICLE.

LAT...LON 3947 8961 3933 8976( 3898 8930 3924 8924

TRUETT

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this tornado warning went out at Aug 23, 3:47 PM CDT, 4 hours 57 minutes earlier.

Area forecast discussion, Aug 23, 3:47 PM CDT, 4 hours 57 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
330 PM WED AUG 23 2000

CONVECTION HAS BGN TO DVLP THIS AFTN IN NERN MO AND S CNTRL MO ALNG
OLD OUTFLOW BOUNDARIES S OF STNRY FNT EXTDG FM SRN NEBRASKA ENE THRU
NRN IL.  WKST CIN ACRS SRN MO AND A SMALL PORTION OF NERN MO WITH
CAPE OVR 4000 J/KG OVR PARTS OF NERN MO.  CONVECTION ACRS SRN MO
SHOULD BE DIURNAL...WKNG JUST AFT SUNSET...BUT ACTIVITY SHOULD BCM
MORE ORGANIZED ALONG STATIONARY FNT AS SHRTWV OVR NWRN IA ERN NE
DROPS SEWD THRU ERN MO IL LTR TGT.  MDLS DEPICT AN AREA OF UPR
DIVERGENCE ACRS ERN MO CNTRL SRN IL TGT IN RGT ENTRANCE REGION OF
ULJ STRK MOVG THRU OH VLY.  NGM...ETA AND MESOETA FAIRLY SIMILIAR
WITH HIGHEST QPF OVR NERN MO THIS EVNG DROPPING SEWD ALNG
MISSISSIPPI RVR.  18Z MESOETA SHOW INDICATIONS OF AN MCS WITH
CONVECTIVELY INDUCED VORT MAX AND OUTFLOW BOUNDARY...BUBBLE HI MOVG
SWD THRU ERN MO LT TGT.  WL INCRS POPS TGT WITH SEWD MOVG MCS
LIKELY.  PCPN CHANCES WL LIKELY SHIFT S THU AFTN AND EVNG WITH MCV
AND OUFLOW BOUNDARY...ALTHOUGH STNRY FNT WL PROBABLY ONLY DROP AS
FAR S AS NRN MO.  TEMPS SHOULD BE A COUPLE OF DGRS COOLER THU WITH
MRNG PCPN AND MCS CLOUD DEBRIS +INTO THE AFTN.

.STL...NONE
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, 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, 12:11 AM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair49 min
Aug 24, 12:27 AM CDTFlash Flood WarningLSXBond, Fayette, Macoupin, Marion, Montgomery6 hr

Nearby

Tornado Warnings in Illinois, 2000Every tornado warning in 2000Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.