Alert archive / Illinois / Tornado Warnings in 2006

Tornado Warning 96, NWS St. Louis, MO

July 21, 2006Marion County, Illinois

NWS St. Louis, MO issued this tornado warning at Jul 21, 2006, 12:20 PM CDT for Marion County, Illinois. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 21, 2006, 12:20 PM CDT (17:20 UTC)
Expired
Jul 21, 2006, 12:58 PM CDT
In force
38 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

County Marion County, IL

The radar

The Evansville,IN radar (KVWX), 113 km from the middle of the area, began a volume at 17:20 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
Jul 21, 9:22 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.3 hours before the alert went out and 181 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 2006-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 801 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 12:00Z on 2006-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
801 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
646 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 211719
TORLSX
ILC121-211815-
/O.NEW.KLSX.TO.W.0096.060721T1720Z-060721T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1220 PM CDT FRI JUL 21 2006

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 115 PM CDT

* AT 1216 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 8 MILES WEST OF
  CENTRALIA...MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CENTRALIA...
  CENTRAL CITY...
  HELM...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 PM CDT FRIDAY
AFTERNOON FOR SOUTHWESTERN ILLINOIS AND EASTERN MISSOURI.

LAT...LON 3859 8915 3848 8915 3848 8871 3858 8871

$$

CVKING
2 follow-up statements
000 
WWUS53 KLSX 211742
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1243 PM CDT FRI JUL 21 2006

ILC121-211815-
/O.CON.KLSX.TO.W.0096.000000T0000Z-060721T1815Z/
MARION IL-
1243 PM CDT FRI JUL 21 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR SOUTHERN
MARION COUNTY...

AT 1240 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR KELL...OR ABOUT 7
MILES EAST OF CENTRALIA...MOVING EAST AT 40 MPH.

LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE...
HELM.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3859 8915 3848 8915 3848 8871 3858 8871

$$

CVKING
000 
WWUS53 KLSX 211758
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1259 PM CDT FRI JUL 21 2006

ILC121-211809-
/O.CAN.KLSX.TO.W.0096.000000T0000Z-060721T1815Z/
MARION IL-
1259 PM CDT FRI JUL 21 2006

...THE TORNADO WARNING FOR SOUTHERN MARION COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY.

ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 PM.

LAT...LON 3859 8915 3848 8915 3848 8871 3858 8871

$$

CVKING

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 10:13 AM CDTSevere Thunderstorm WarningLSXCalhoun47 min
Jul 21, 10:34 AM CDTSevere Thunderstorm WarningLSXJersey41 min
Jul 21, 10:48 AM CDTSevere Thunderstorm WarningLSXMadison57 min
Jul 21, 10:57 AM CDTSevere Thunderstorm WarningLSXSaint Clair63 min
Jul 21, 11:24 AM CDTSevere Thunderstorm WarningLSXClinton, Washington66 min
Jul 21, 11:35 AM CDTTornado WarningLSXMadison26 min
Jul 21, 11:42 AM CDTTornado WarningLSXClinton63 min
Jul 21, 11:59 AM CDTTornado WarningLSXWashington46 min

Nearby

Tornado Warnings in Illinois, 2006Every tornado warning in 2006Tornadoes in 2006

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.