Alert archive / Illinois / Tornado Warnings in 2008

Tornado Warning 98, NWS St. Louis, MO

December 27, 2008Greene County, Jersey County, Macoupin County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 27, 2008, 11:34 AM CST for Greene County, Jersey County, Macoupin County, Illinois. It was in force for 41 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 27, 2008, 11:34 AM CST (17:34 UTC)
Expired: Dec 27, 2008, 12:15 PM CST
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Greene County, IL, Jersey County, IL, Macoupin County, IL

The radar

The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 17:36 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.

What was reported inside it

Time	Report	Where	Remark
Dec 27, 12:05 PM CST	TSTM WND DMG	4 N Jerseyville, IL	35 MPH WIND GUST.
Dec 27, 12:05 PM CST	HAIL 0.25	4 N Jerseyville, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Dec 27, 4:30 AM CST	Tornado Watch	SPC	8 hr
Dec 27, 10:58 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.6 hours before the alert went out and 184 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 87 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 538 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 451 m²/s²
0-3 km storm-relative helicity: 455 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 271734
TORLSX
ILC061-083-117-271815-
/O.NEW.KLSX.TO.W.0098.081227T1734Z-081227T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1134 AM CST SAT DEC 27 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN GREENE COUNTY IN SOUTHWEST ILLINOIS
  NORTHERN JERSEY COUNTY IN SOUTHWEST ILLINOIS
  NORTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 1215 PM CST

* AT 1128 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 21 MILES WEST OF OLD
  KANE...OR ABOUT 4 MILES SOUTHEAST OF ELSBERRY...MOVING EAST AT 55
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  OLD KANE...
  CARROLLTON...
  JERSEYVILLE...
  GREENFIELD...
  KEMPER...

THE DESTRUCTION OF A BARN HAS BEEN REPORTED IN LINCOLN COUNTY 
MISSOURI WITH THIS STORM.  THIS IS A DANGEROUS SITUATION...TAKE 
IMMEDIATE ACTION TO PROTECT YOUR LIFE 

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

LAT...LON 3921 8985 3907 9059 3910 9061 3917 9061
      3920 9060 3926 9061 3930 9061 3952 9008
TIME...MOT...LOC 1733Z 249DEG 46KT 3915 9067

$$

CARNEY

2 follow-up statements

000 
WWUS53 KLSX 271756
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1156 AM CST SAT DEC 27 2008

ILC061-083-117-271815-
/O.CON.KLSX.TO.W.0098.000000T0000Z-081227T1815Z/
JERSEY IL-GREENE IL-MACOUPIN IL-
1157 AM CST SAT DEC 27 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 PM CST FOR
NORTHWESTERN MACOUPIN...SOUTHERN GREENE AND NORTHEASTERN JERSEY
COUNTIES...

AT 1153 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR CARROLLTON...OR 9
MILES NORTH OF JERSEYVILLE...AND WAS MOVING EAST AT 50 MPH.

LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE...ROCKBRIDGE...
GREENFIELD...KEMPER...CHESTERFIELD...HETTICK AND SCOTTVILLE.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

LAT...LON 3914 9042 3921 9049 3933 9051 3952 9008
      3921 8985
TIME...MOT...LOC 1757Z 248DEG 45KT 3927 9032

$$

CARNEY

000 
WWUS53 KLSX 271815
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1215 PM CST SAT DEC 27 2008

ILC061-083-117-271825-
/O.EXP.KLSX.TO.W.0098.000000T0000Z-081227T1815Z/
JERSEY IL-GREENE IL-MACOUPIN IL-
1215 PM CST SAT DEC 27 2008

...THE TORNADO WARNING FOR NORTHWESTERN MACOUPIN...SOUTHERN GREENE
AND NORTHEASTERN JERSEY COUNTIES EXPIRES AT 1215 PM CST...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER
APPEARED TO BE SEVERE.

ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE...AND A TORNADO WATCH 
REMAINS IN EFFECT UNTIL 700 PM CST.

LAT...LON 3914 9042 3921 9049 3933 9051 3952 9008
      3921 8985
TIME...MOT...LOC 1815Z 248DEG 45KT 3935 9005

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 27, 1:23 AM CST	Tornado Warning	LSX	Adams	47 min
Dec 27, 2:13 AM CST	Tornado Warning	LSX	Adams, Pike	47 min
Dec 27, 2:37 AM CST	Flash Flood Warning	LSX	Adams	6 hr
Dec 27, 4:05 AM CST	Wind Advisory	LSX	Bond, Clinton, Fayette, Jersey, Macoupin, Madison and 6 more	12 hr
Dec 27, 10:32 AM CST	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	43 min
Dec 27, 10:46 AM CST	Tornado Warning	LSX	Calhoun, Greene, Pike	44 min
Dec 27, 10:58 AM CST	Tornado Warning	LSX	Calhoun	47 min
Dec 27, 11:02 AM CST	Severe Thunderstorm Warning	LSX	Calhoun	43 min
Dec 27, 12:30 PM CST	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	30 min
Dec 27, 12:41 PM CST	Flash Flood Warning	LSX	Calhoun, Jersey, Madison, Monroe, Saint Clair	6 hr
Dec 27, 1:06 PM CST	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison, Monroe, Saint Clair	54 min
Dec 27, 1:37 PM CST	Severe Thunderstorm Warning	LSX	Bond, Greene, Jersey, Macoupin, Madison, Monroe and 2 more	53 min
Dec 27, 1:53 PM CST	River Flood Warning	LSX	Pike	48 hr
Dec 27, 4:09 PM CST	Tornado Warning	LSX	Randolph, Saint Clair, Washington	51 min
Dec 27, 4:14 PM CST	Areal Flood Advisory	LSX	Bond, Clinton, Fayette, Macoupin, Madison, Monroe and 4 more	4 hr
Dec 27, 4:34 PM CST	Tornado Warning	LSX	Clinton, Marion, Washington	41 min

Nearby

Tornado Warnings in Illinois, 2008 Every tornado warning in 2008 Tornadoes in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.