Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 342, NWS St. Louis, MO

June 18, 20118 counties in Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 2011, 6:51 AM CDT for 8 counties in Illinois. It was in force for 54 min. 9 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, 6:51 AM CDT (11:51 UTC)
Expired: Jun 18, 2011, 7:45 AM CDT
In force: 54 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Madison County, IL, Marion County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL

The radar

The St Louis radar (KLSX), 104 km from the middle of the area, began a volume at 11:52 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, 6:54 AM CDT	TSTM WND GST 54	New Baden, IL
Jun 18, 6:54 AM CDT	HAIL 0.25	New Baden, IL
Jun 18, 6:58 AM CDT	TSTM WND GST 45	Aviston, IL
Jun 18, 7:18 AM CDT	TSTM WND GST 60	Hoyleton, IL	VERY LITTLE BIT OF HAIL.
Jun 18, 7:18 AM CDT	HAIL 0.25	Hoyleton, IL	VERY LITTLE BIT OF HAIL.
Jun 18, 7:20 AM CDT	HAIL 0.25	Carlyle, IL
Jun 18, 7:21 AM CDT	HAIL 0.25	Carlyle, IL
Jun 18, 7:33 AM CDT	TSTM WND DMG	4 S Pittsburg, IL	SEVERAL TREES BLOWN DOWN...A FEW ONTO POWER LINES.
Jun 18, 7:34 AM CDT	HAIL 0.25	Centralia, 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
Jun 18, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 11.9 hours before the alert went out and 231 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.

657 
WUUS53 KLSX 181151
SVRLSX
ILC005-027-051-119-121-157-163-189-181245-
/O.NEW.KLSX.SV.W.0342.110618T1151Z-110618T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
651 AM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...
  CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHWESTERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHEASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
  WESTERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...
  RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  EASTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
  WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 745 AM CDT

* AT 647 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM CARPENTER TO NEW BADEN TO BALDWIN TO EVANSVILLE...AND MOVING
  EAST AT 45 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING
  WINDS.

* LOCATIONS IMPACTED INCLUDE...
  SPARTA...CHESTER...HIGHLAND...BREESE...NASHVILLE...CARLYLE...
  CENTRALIA...TRENTON...TILDEN...ALBERS...LIVELY GROVE...AVISTON...
  OKAWVILLE...BREMEN...COULTERVILLE...GERMANTOWN...STEELEVILLE...ST.
  ROSE...PERCY AND POCAHONTAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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 3847 8914 3822 8914 3822 8959 3795 8959
      3787 8965 3794 8995 3795 8993 3797 8994
      3796 8999 3797 9001 3800 9002 3822 8989
      3859 8979 3888 8987 3888 8913 3847 8907
TIME...MOT...LOC 1151Z 287DEG 41KT 3883 8979 3856 8968
          3819 8978 3802 8989
WIND...HAIL 60MPH 0.75IN

$$

BRITT

5 follow-up statements

960 
WWUS53 KLSX 181202
SVSLSX

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

ILC005-027-051-119-121-157-163-189-181245-
/O.CON.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MADISON IL-MARION IL-FAYETTE IL-RANDOLPH IL-ST. CLAIR IL-
WASHINGTON IL-BOND IL-CLINTON IL-
702 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CLINTON...
SOUTHERN BOND...WASHINGTON...EASTERN ST. CLAIR...RANDOLPH...
SOUTHWESTERN FAYETTE...WESTERN MARION AND SOUTHEASTERN MADISON
COUNTIES UNTIL 745 AM CDT...

AT 701 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 6 MILES WEST OF POCAHONTAS TO GERMANTOWN TO COULTERVILLE TO
BREMEN...MOVING EAST AT 45 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY
THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  BREESE...CARLYLE...NASHVILLE...CENTRALIA...ST. ROSE...
  COULTERVILLE...STEELEVILLE...JAMESTOWN...POCAHONTAS...PERCY...
  BECKEMEYER...BEAVER CREEK...TAMALCO...SHATTUC...BOULDER...WAMAC...
  IRVINGTON...ASHLEY...CENTRAL CITY AND SANDOVAL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3847 8914 3822 8914 3822 8959 3795 8959
      3787 8965 3794 8995 3795 8993 3797 8994
      3796 8999 3797 9001 3800 9002 3822 8989
      3859 8979 3888 8987 3888 8913 3847 8907
TIME...MOT...LOC 1202Z 275DEG 38KT 3884 8963 3857 8952
          3820 8962 3803 8973
WIND...HAIL 60MPH 0.75IN

$$

BRITT

186 
WWUS53 KLSX 181215
SVSLSX

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

ILC005-051-119-163-181224-
/O.CAN.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MADISON IL-FAYETTE IL-ST. CLAIR IL-BOND IL-
715 AM CDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BOND...EASTERN ST.
CLAIR...SOUTHWESTERN FAYETTE AND SOUTHEASTERN MADISON COUNTIES IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3847 8914 3822 8914 3822 8959 3795 8959
      3787 8965 3794 8995 3795 8993 3797 8994
      3796 8999 3797 9001 3800 9002 3822 8970
      3875 8958 3874 8914 3874 8912 3847 8907
TIME...MOT...LOC 1214Z 266DEG 42KT 3872 8937 3846 8937
          3820 8950 3793 8975

$$

ILC027-121-157-189-181245-
/O.CON.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MARION IL-RANDOLPH IL-WASHINGTON IL-CLINTON IL-
715 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CLINTON...
WASHINGTON...RANDOLPH AND SOUTHWESTERN MARION COUNTIES UNTIL 745 AM
CDT...

AT 710 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM BEAVER CREEK TO 7 MILES EAST OF OKAWVILLE TO COULTERVILLE TO
CHESTER...MOVING EAST AT 50 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY
THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  NASHVILLE...CENTRALIA...PERCY...BOULDER...SHATTUC...IRVINGTON...
  WAMAC...CENTRAL CITY...ASHLEY...SANDOVAL...POSEY...HUEGELY...
  HUEY...KEYESPORT...HOYLETON...HOFFMAN...BEAUCOUP...POSEN...FERRIN
  AND RICHVIEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3847 8914 3822 8914 3822 8959 3795 8959
      3787 8965 3794 8995 3795 8993 3797 8994
      3796 8999 3797 9001 3800 9002 3822 8970
      3875 8958 3874 8914 3874 8912 3847 8907
TIME...MOT...LOC 1214Z 266DEG 42KT 3872 8937 3846 8937
          3820 8950 3793 8975
WIND...HAIL 60MPH 0.75IN

$$

BRITT

307 
WWUS53 KLSX 181226
SVSLSX

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

ILC027-121-157-189-181245-
/O.CON.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MARION IL-RANDOLPH IL-WASHINGTON IL-CLINTON IL-
726 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
CLINTON...WASHINGTON...EASTERN RANDOLPH AND SOUTHWESTERN MARION
COUNTIES UNTIL 745 AM CDT...

AT 724 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM BOULDER TO IRVINGTON TO 8 MILES NORTHWEST OF TAMAROA TO
WILLISVILLE...MOVING EAST AT 50 MPH. PENNY SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  CENTRALIA...IRVINGTON...WAMAC...CENTRAL CITY...SANDOVAL...ASHLEY...
  RICHVIEW...JUNCTION CITY...RADOM AND DU BOIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3847 8914 3822 8914 3822 8959 3795 8959
      3787 8965 3791 8983 3822 8960 3874 8938
      3874 8912 3847 8907
TIME...MOT...LOC 1226Z 266DEG 42KT 3873 8919 3847 8919
          3821 8932 3794 8957
WIND...HAIL 60MPH 0.75IN

$$

CVKING

740 
WWUS53 KLSX 181237
SVSLSX

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

ILC157-181247-
/O.CAN.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
RANDOLPH IL-
737 AM CDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RANDOLPH COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3847 8914 3822 8914 3822 8930 3874 8925
      3874 8916 3874 8913 3847 8907
TIME...MOT...LOC 1237Z 266DEG 42KT 3874 8902 3848 8903
          3822 8916

$$

ILC027-121-189-181245-
/O.CON.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MARION IL-WASHINGTON IL-CLINTON IL-
737 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
CLINTON...EASTERN WASHINGTON AND SOUTHWESTERN MARION COUNTIES UNTIL
745 AM CDT...

AT 733 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM PATOKA TO WAMAC TO 6 MILES NORTH OF TAMAROA...MOVING EAST AT 50
MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3847 8914 3822 8914 3822 8930 3874 8925
      3874 8916 3874 8913 3847 8907
TIME...MOT...LOC 1237Z 266DEG 42KT 3874 8902 3848 8903
          3822 8916
WIND...HAIL 60MPH 0.75IN

$$

CVKING

912 
WWUS53 KLSX 181247
SVSLSX

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

ILC027-121-189-181257-
/O.EXP.KLSX.SV.W.0342.000000T0000Z-110618T1245Z/
MARION IL-WASHINGTON IL-CLINTON IL-
747 AM CDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CLINTON...EASTERN
WASHINGTON AND SOUTHWESTERN MARION COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3847 8914 3822 8914 3822 8930 3874 8925
      3874 8916 3874 8913 3847 8907
TIME...MOT...LOC 1237Z 266DEG 42KT 3874 8902 3848 8903
          3822 8916

$$

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, 5:30 AM CDT	Tornado Warning	LSX	Calhoun, Greene, Jersey, Madison, Pike	19 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, 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

Nearby

Severe Thunderstorm Warnings in Illinois, 2011 Every severe thunderstorm warning 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.