Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS St. Louis, MO

January 17, 2012Clinton County, Fayette County, Marion County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jan 17, 2012, 5:47 AM CST for Clinton County, Fayette County, Marion County, Illinois. It was in force for 43 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: Jan 17, 2012, 5:47 AM CST (11:47 UTC)
Expired: Jan 17, 2012, 6:30 AM CST
In force: 43 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clinton County, IL, Fayette County, IL, Marion County, IL

The radar

The Evansville,IN radar (KVWX), 115 km from the middle of the area, began a volume at 11:49 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.

Issued	Product	Office	Lasted
Jan 16, 11:47 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 11.8 hours before the alert went out and 153 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: 2 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 431 m²/s²
0-3 km storm-relative helicity: 500 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

935 
WUUS53 KLSX 171147
SVRLSX
ILC027-051-121-171230-
/O.NEW.KLSX.SV.W.0013.120117T1147Z-120117T1230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
547 AM CST TUE JAN 17 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
  NORTHERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 630 AM CST

* AT 543 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  TAMALCO...OR 7 MILES NORTHEAST OF CARLYLE...AND MOVING EAST AT 60
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  SALEM...SHATTUC...SANDOVAL...FAIRMAN...PATOKA...ODIN...SHOBONIER...
  KINMUNDY...OMEGA...STEPHEN FORBES STATE PARK...FARINA...
  PITTSBURG...VERNON...SELMAVILLE...TONTI...ST. PAUL...ALMA...
  BRUBAKER...ST. PETER AND LOOGOOTEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3861 8870 3857 8924 3887 8925 3894 8881
      3891 8880 3892 8870 3891 8870
TIME...MOT...LOC 1147Z 261DEG 54KT 3872 8924
WIND...HAIL 60MPH 1.00IN

$$

TILLY

2 follow-up statements

024 
WWUS53 KLSX 171207
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
607 AM CST TUE JAN 17 2012

ILC027-171217-
/O.CAN.KLSX.SV.W.0013.000000T0000Z-120117T1230Z/
CLINTON IL-
607 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLINTON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS 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 3861 8870 3858 8914 3882 8914 3892 8870
TIME...MOT...LOC 1207Z 258DEG 60KT 3869 8892

$$

ILC051-121-171230-
/O.CON.KLSX.SV.W.0013.000000T0000Z-120117T1230Z/
MARION IL-FAYETTE IL-
607 AM CST TUE JAN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
FAYETTE AND NORTHERN MARION COUNTIES UNTIL 630 AM CST...

AT 604 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR 
SALEM...MOVING EAST AT 60 MPH. 

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE AND LARGE HAIL. 

LOCATIONS IMPACTED INCLUDE...
  KINMUNDY...OMEGA...STEPHEN FORBES STATE PARK...FARINA...BRUBAKER...
  IUKA...ST. PETER AND LA CLEDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3861 8870 3858 8914 3882 8914 3892 8870
TIME...MOT...LOC 1207Z 258DEG 60KT 3869 8892
WIND...HAIL 60MPH 1.00IN

$$

TILLY

908 
WWUS53 KLSX 171226
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
626 AM CST TUE JAN 17 2012

ILC051-121-171236-
/O.EXP.KLSX.SV.W.0013.000000T0000Z-120117T1230Z/
MARION IL-FAYETTE IL-
626 AM CST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FAYETTE AND
NORTHERN MARION COUNTIES WILL EXPIRE AT 630 AM CST...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 700 AM. 

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 3861 8870 3858 8914 3882 8914 3892 8870
TIME...MOT...LOC 1226Z 260DEG 52KT 3870 8860

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 16, 11:59 PM CST	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	58 days
Jan 17, 1:23 AM CST	Severe Thunderstorm Warning	LSX	Calhoun	37 min
Jan 17, 2:08 AM CST	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	37 min
Jan 17, 2:17 AM CST	Severe Thunderstorm Warning	LSX	Madison	28 min
Jan 17, 2:35 AM CST	Tornado Warning	LSX	Monroe	40 min
Jan 17, 2:38 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	52 min
Jan 17, 2:39 AM CST	Severe Thunderstorm Warning	LSX	Bond	36 min
Jan 17, 3:07 AM CST	Tornado Warning	LSX	Clinton, Monroe, Saint Clair, Washington	38 min
Jan 17, 3:23 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Marion	35 min
Jan 17, 3:46 AM CST	Tornado Warning	LSX	Clinton, Washington	29 min
Jan 17, 4:34 AM CST	Areal Flood Advisory	LSX	Bond, Clinton, Fayette, Macoupin, Madison, Marion and 4 more	60 days
Jan 17, 5:14 AM CST	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair	46 min
Jan 17, 5:22 AM CST	Severe Thunderstorm Warning	LSX	Monroe, Randolph	38 min
Jan 17, 5:53 AM CST	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair, Washington	52 min
Jan 17, 6:01 AM CST	Severe Thunderstorm Warning	LSX	Randolph	44 min
Jan 17, 6:35 AM CST	Severe Thunderstorm Warning	LSX	Randolph	25 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2012 Every severe thunderstorm warning in 2012

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.