Alert archive / Illinois / Tornado Warnings in 2011

Tornado Warning 124, NWS St. Louis, MO

June 18, 20115 counties in Illinois; Lincoln County, Pike County, Saint Charles County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 18, 2011, 5:30 AM CDT for 5 counties in Illinois; Lincoln County, Pike County, Saint Charles County, Missouri. It was in force for 19 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: Jun 18, 2011, 5:30 AM CDT (10:30 UTC)
Expired: Jun 18, 2011, 5:49 AM CDT
In force: 19 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Calhoun County, IL, Greene County, IL, Jersey County, IL, Madison County, IL, Pike County, IL, Lincoln County, MO, Pike County, MO, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 44 km from the middle of the area, began a volume at 10:29 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
Jun 18, 5:34 AM CDT	TSTM WND DMG	Flint Hill, MO	A COUPLE OF THREE INCH TREE LIMBS BLOWN DOWN.
Jun 18, 5:58 AM CDT	TSTM WND GST 50	Orchard Farms, MO

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
Jun 18, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.5 hours before the alert went out and 205 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: 601 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 644 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

222 
WFUS53 KLSX 181030
TORLSX
ILC013-061-083-119-149-MOC113-163-183-181130-
/O.NEW.KLSX.TO.W.0124.110618T1030Z-110618T1130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
530 AM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  WESTERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
  JERSEY COUNTY IN SOUTHWEST ILLINOIS...
  NORTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
  SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  EASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  EAST CENTRAL PIKE COUNTY IN NORTHEAST MISSOURI...
  NORTHERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 630 AM CDT

* AT 525 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
  TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE.
  THESE DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6
  MILES NORTHWEST OF EOLIA TO MOSCOW MILLS TO WENTZVILLE...AND MOVING
  EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ST. PAUL...ELSBERRY...JERSEYVILLE...GODFREY...WINFIELD...
  CLARKSVILLE...BELLEVIEW...HARDIN...ORCHARD FARMS...GRAFTON...
  ELSAH...PORTAGE DES SIOUX...OLD KANE...CARROLLTON...NEW HOPE...OLD
  MONROE...PAYNESVILLE...FOLEY...ANNADA AND BEECHVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND 
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE 
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST 
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 3901 9014 3892 9013 3880 9087 3901 9093
      3933 9109 3952 9056
TIME...MOT...LOC 1030Z 265DEG 39KT 3932 9101 3896 9083
          3882 9080

$$

CVKING

2 follow-up statements

369 
WWUS53 KLSX 181041
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
541 AM CDT SAT JUN 18 2011

ILC013-061-083-119-149-MOC113-163-183-181130-
/O.CON.KLSX.TO.W.0124.000000T0000Z-110618T1130Z/
JERSEY IL-MADISON IL-PIKE IL-CALHOUN IL-GREENE IL-LINCOLN MO-PIKE MO-
ST. CHARLES MO-
541 AM CDT SAT JUN 18 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN GREENE...
CALHOUN...NORTHWESTERN MADISON AND JERSEY COUNTIES IN SOUTHWEST
ILLINOIS...AND SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
AND NORTHEASTERN ST. CHARLES AND EASTERN LINCOLN COUNTIES IN EAST
CENTRAL MISSOURI...AND EAST CENTRAL PIKE COUNTY IN NORTHEAST MISSOURI
UNTIL 630 AM CDT...

AT 538 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THESE DANGEROUS STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM CLARKSVILLE TO WINFIELD TO ST.
PAUL...MOVING EAST AT 45 MPH.

THE STRONGEST ROTATION...AND POSSIBLE TORNADO...WAS LOCATED NEAR OLD 
MONROE AND WAS MOVING EAST ALONG THE LINCOLN...ST. CHARLES COUNTY 
LINE. OTHER CIRCULATIONS WERE EVIDENT UP AND DOWN THE LINE OF SEVERE 
THUNDERSTORMS...AND EACH OF THESE COULD ALSO PRODUCE A TORNADO AT 
ANY TIME. TAKE SHELTER IMMEDIATELY!


LOCATIONS IMPACTED INCLUDE...
  JERSEYVILLE...GODFREY...BELLEVIEW...HARDIN...ORCHARD FARMS...
  GRAFTON...PORTAGE DES SIOUX...ELSAH...OLD KANE...CARROLLTON...
  BEECHVILLE...BATCHTOWN...GOLDEN EAGLE...BRUSSELS...MEPPEN...
  MOZIER...HAMBURG...DEER PLAIN...NUTWOOD AND MICHAEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 3952 9056 3901 9014 3892 9013 3883 9072
      3937 9098
TIME...MOT...LOC 1040Z 265DEG 39KT 3936 9089 3897 9069
          3884 9063

$$

CVKING

594 
WWUS53 KLSX 181049
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
549 AM CDT SAT JUN 18 2011

ILC013-061-083-119-149-MOC113-163-183-181059-
/O.CAN.KLSX.TO.W.0124.000000T0000Z-110618T1130Z/
JERSEY IL-MADISON IL-PIKE IL-CALHOUN IL-GREENE IL-LINCOLN MO-PIKE MO-
ST. CHARLES MO-
549 AM CDT SAT JUN 18 2011

...THE TORNADO WARNING FOR WESTERN GREENE...CALHOUN...NORTHWESTERN
MADISON AND JERSEY COUNTIES IN SOUTHWEST ILLINOIS...AND SOUTHEASTERN
PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND NORTHEASTERN ST. CHARLES
AND EASTERN LINCOLN COUNTIES IN EAST CENTRAL MISSOURI...AND EAST
CENTRAL PIKE COUNTY IN NORTHEAST MISSOURI IS CANCELLED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN 
EFFECT FOR THE AREA.  HEAVY RAIN IS LIKELY WITH THESE THUNDERSTORMS.

LAT...LON 3952 9056 3901 9014 3892 9013 3883 9072
      3937 9098
TIME...MOT...LOC 1049Z 265DEG 39KT 3937 9076 3898 9056
          3885 9050

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 12:30 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	45 min
Jun 18, 1:14 AM CDT	Flash Flood Warning	LSX	Macoupin, Montgomery	12 hr
Jun 18, 1:16 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	29 min
Jun 18, 2:51 AM CDT	Flash Flood Warning	LSX	Fayette, Montgomery	6 hr
Jun 18, 4:31 AM CDT	Flash Flood Warning	LSX	Bond, Fayette	6 hr
Jun 18, 5:01 AM CDT	Flash Flood Warning	LSX	Clinton, Marion	6 hr
Jun 18, 5:10 AM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Calhoun, Greene, Pike	65 min
Jun 18, 5:18 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Madison, Monroe, Saint Clair	57 min
Jun 18, 6:09 AM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison, Montgomery	51 min
Jun 18, 6:20 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Madison, Monroe, Randolph, Saint Clair, Washington	40 min
Jun 18, 6:21 AM CDT	Tornado Warning	LSX	Clinton, Monroe, Randolph, Saint Clair, Washington	39 min
Jun 18, 6:51 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison, Marion, Randolph and 2 more	54 min
Jun 18, 7:24 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion	30 min
Jun 18, 1:06 PM CDT	Areal Flood Warning	LSX	Macoupin, Montgomery	4 hr
Jun 18, 3:57 PM CDT	Flash Flood Watch	LSX	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more	15 hr
Jun 18, 4:49 PM CDT	River Flood Warning	LSX	Fayette	5 days
Jun 18, 5:01 PM CDT	Areal Flood Warning	LSX	Macoupin, Montgomery	23 hr
Jun 18, 3:12 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Osage	63 min
Jun 18, 4:00 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Cole, Gasconade, Montgomery, Osage	45 min
Jun 18, 4:30 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 4 more	60 min
Jun 18, 4:56 AM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	49 min
Jun 18, 5:07 AM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Pike	38 min
Jun 18, 5:50 AM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis, City of Saint Louis	3 hr
Jun 18, 7:28 AM CDT	Severe Thunderstorm Warning	LSX	Madison	16 min

Nearby

Tornado Warnings in Illinois, 2011 Tornado Warnings in Missouri, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.