Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 193, NWS St. Louis, MO

December 10, 20215 counties in Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Dec 10, 2021, 10:18 PM CST for 5 counties in Illinois. It was in force for 57 min. 4 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 10, 2021, 10:18 PM CST (04:18 UTC)
Expired: Dec 10, 2021, 11:15 PM CST
In force: 57 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bond County, IL, Fayette County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL

The radar

The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 04:22 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 10, 10:35 PM CST	TSTM WND DMG	2 Nw Reno, IL	TREES AND POWERLINES DOWN.
Dec 10, 10:35 PM CST	TSTM WND DMG	Taylor Springs, IL	REPORTS OF DENSE STYROFOAM MATERIAL SCATTERED ACROSS TAYLOR SPRINGS AS WELL AS NEIGHBORING COMMUNITIES.
Dec 10, 10:38 PM CST	TSTM WND DMG	Fillmore, IL	REPORT OF POWERLINES DOWN.
Dec 10, 10:38 PM CST	TSTM WND DMG	Nokomis, IL	REPORT OF A TREE DOWN.

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 10, 5:17 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.3 hours before the alert went out and 146 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: 119 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 662 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

347 
WUUS53 KLSX 110418
SVRLSX
ILC005-051-117-119-135-110515-
/O.NEW.KLSX.SV.W.0193.211211T0418Z-211211T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1018 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Bond County in south central Illinois...
  Eastern Madison County in southwestern Illinois...
  Fayette County in south central Illinois...
  Southeastern Macoupin County in southwestern Illinois...
  Southern Montgomery County in south central Illinois...

* Until 1115 PM CST.

* At 1017 PM CST, severe thunderstorms were located along a line
  extending from near Mount Olive to near Sorento to near Troy,
  moving east at 70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Litchfield, Taylor Springs, Sorento and Reno around 1025 PM CST.
  Hillsboro, Coffeen, Schram City and Woburn around 1030 PM CST.
  Witt, Pocahontas and Van Burensburg around 1035 PM CST.

Other locations in the path of these severe thunderstorms include
Greenville, Nokomis, Beaver Creek, Ramsey, Tamalco, Mulberry Grove,
Vandalia, Wrights Corner, Shobonier and Brownstown.

This includes the following highways...
 Interstate 70 in Illinois between exits 30 and 76.
 Interstate 55 in Illinois near exit 44.
 Interstate 57 in Illinois near exit 135.

This also includes Ramsey Lake State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for south central
and southwestern Illinois.

For your protection move to an interior room on the lowest floor of a
building.

A Tornado Watch remains in effect until 1100 PM CST for south central
and southwestern Illinois.

&&

LAT...LON 3883 8870 3882 8913 3874 8914 3874 8959
      3866 8960 3866 8973 3885 8964 3913 8981
      3935 8914 3922 8914 3922 8881 3891 8881
      3892 8869
TIME...MOT...LOC 0417Z 250DEG 61KT 3911 8969 3896 8964 3871 8987 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BSH

4 follow-up statements

616 
WWUS53 KLSX 110434
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1034 PM CST Fri Dec 10 2021

ILC117-110444-
/O.CAN.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Macoupin IL-
1034 PM CST Fri Dec 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MACOUPIN COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for south central
and southwestern Illinois.

LAT...LON 3883 8870 3882 8913 3874 8914 3874 8959
      3866 8960 3866 8973 3885 8964 3905 8946
      3923 8948 3935 8914 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0434Z 250DEG 61KT 3920 8937 3905 8932 3880 8955 

$$

ILC005-051-119-135-110515-
/O.CON.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Bond IL-Madison IL-Fayette IL-Montgomery IL-
1034 PM CST Fri Dec 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CST
FOR BOND COUNTY IN SOUTH CENTRAL ILLINOIS...SOUTHEASTERN MADISON
COUNTY IN SOUTHWESTERN ILLINOIS...FAYETTE AND SOUTHEASTERN MONTGOMERY
COUNTIES IN SOUTH CENTRAL ILLINOIS...

At 1034 PM CST, severe thunderstorms were located along a line
extending from near Witt to near Van Burensburg to Pocahontas, moving
east at 70 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Nokomis, Witt, Van Burensburg, Ramsey, Tamalco, Woburn, Mulberry 
  Grove, Wrights Corner, Shobonier, Vandalia, Brownstown and St. 
  Elmo.

This also includes Ramsey Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 30 and 76.
 Interstate 57 in Illinois near exit 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for south central
and southwestern Illinois.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3883 8870 3882 8913 3874 8914 3874 8959
      3866 8960 3866 8973 3885 8964 3905 8946
      3923 8948 3935 8914 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0434Z 250DEG 61KT 3920 8937 3905 8932 3880 8955 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

BSH

106 
WWUS53 KLSX 110449
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1049 PM CST Fri Dec 10 2021

ILC119-110459-
/O.CAN.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Madison IL-
1049 PM CST Fri Dec 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MADISON COUNTY IN
SOUTHWESTERN ILLINOIS IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.

LAT...LON 3883 8870 3882 8913 3874 8914 3874 8959
      3888 8955 3935 8914 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0449Z 250DEG 61KT 3928 8908 3913 8903 3888 8926 

$$

ILC005-051-135-110515-
/O.CON.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Bond IL-Fayette IL-Montgomery IL-
1049 PM CST Fri Dec 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CST
FOR BOND...FAYETTE AND SOUTHEASTERN MONTGOMERY COUNTIES...

At 1049 PM CST, severe thunderstorms were located along a line
extending from 7 miles south of Pana to near Ramsey to near Mulberry
Grove, moving east at 70 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Vandalia, Greenville, St. Elmo, Ramsey, Pocahontas, Brownstown,
Mulberry Grove, Tamalco, Farina, Beaver Creek, Shobonier, Woburn,
Wrights Corner, Van Burensburg, Avena, Pleasant Mound, La Clede,
Pierron, Pittsburg and Shafter.

This also includes Ramsey Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 36 and 76.
 Interstate 57 in Illinois near exit 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3883 8870 3882 8913 3874 8914 3874 8959
      3888 8955 3935 8914 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0449Z 250DEG 61KT 3928 8908 3913 8903 3888 8926 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

BSH

735 
WWUS53 KLSX 110456
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1056 PM CST Fri Dec 10 2021

ILC135-110506-
/O.CAN.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Montgomery IL-
1056 PM CST Fri Dec 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTGOMERY COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.

LAT...LON 3883 8870 3882 8913 3880 8948 3889 8948
      3903 8933 3903 8925 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0456Z 270DEG 61KT 3930 8894 3915 8889 3890 8913 

$$

ILC005-051-110515-
/O.CON.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Bond IL-Fayette IL-
1056 PM CST Fri Dec 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CST
FOR EASTERN BOND AND FAYETTE COUNTIES...

At 1056 PM CST, severe thunderstorms were located along a line
extending from near Tower Hill to near Wrights Corner to near
Shobonier, moving east at 70 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Vandalia, Greenville, St. Elmo, Ramsey, Brownstown, Mulberry Grove,
Farina, Wrights Corner, Shobonier, Woburn, Avena, Pleasant Mound, La
Clede, Pittsburg, Shafter, Herrick, St. Peter, Smithboro, Loogootee
and St. James.

This also includes Ramsey Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 41 and 76.
 Interstate 57 in Illinois near exit 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3883 8870 3882 8913 3880 8948 3889 8948
      3903 8933 3903 8925 3922 8914 3922 8881
      3891 8881 3892 8869
TIME...MOT...LOC 0456Z 270DEG 61KT 3930 8894 3915 8889 3890 8913 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BSH

020 
WWUS53 KLSX 110503
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1103 PM CST Fri Dec 10 2021

ILC005-110513-
/O.CAN.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Bond IL-
1103 PM CST Fri Dec 10 2021

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

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 500 AM CST for south central
Illinois.

LAT...LON 3881 8925 3903 8925 3922 8881 3891 8881
      3881 8923
TIME...MOT...LOC 0503Z 250DEG 61KT 3933 8885 3918 8880 3893 8904 

$$

ILC051-110515-
/O.CON.KLSX.SV.W.0193.000000T0000Z-211211T0515Z/
Fayette IL-
1103 PM CST Fri Dec 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CST
FOR FAYETTE COUNTY...

At 1103 PM CST, severe thunderstorms were located along a line
extending from near Cowden to Beecher City to near Shobonier, moving
east at 70 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Vandalia, St. Elmo, Brownstown, Wrights Corner, Shobonier, Avena,
Pittsburg, Shafter, Loogootee, St. James and Hagerstown.

This includes Interstate 70 in Illinois between exits 61 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 AM CST for south central
Illinois.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3881 8925 3903 8925 3922 8881 3891 8881
      3881 8923
TIME...MOT...LOC 0503Z 250DEG 61KT 3933 8885 3918 8880 3893 8904 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 6:42 PM CST	Tornado Warning	LSX	Pike	48 min
Dec 10, 7:11 PM CST	Tornado Warning	LSX	Pike	49 min
Dec 10, 7:16 PM CST	Tornado Warning	LSX	Pike	14 min
Dec 10, 7:30 PM CST	Tornado Warning	LSX	Calhoun, Greene, Jersey	45 min
Dec 10, 7:35 PM CST	Tornado Warning Tornado observed	LSX	Calhoun, Jersey	40 min
Dec 10, 7:36 PM CST	Tornado Warning	LSX	Pike	21 min
Dec 10, 8:06 PM CST	Tornado Warning Tornado observed	LSX	Jersey, Macoupin, Madison	39 min
Dec 10, 8:33 PM CST	Tornado Warning Tornado observedConsiderable damage threat	LSX	Bond, Madison	42 min
Dec 10, 8:37 PM CST	Tornado Warning	LSX	Macoupin, Madison	17 min
Dec 10, 8:44 PM CST	Tornado Warning Tornado observed	LSX	Fayette, Macoupin, Madison, Montgomery	46 min
Dec 10, 8:56 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	34 min
Dec 10, 9:07 PM CST	Severe Thunderstorm Warning	LSX	Calhoun	38 min
Dec 10, 9:39 PM CST	Tornado Warning	LSX	Macoupin, Madison	51 min
Dec 10, 10:05 PM CST	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	25 min
Dec 10, 10:19 PM CST	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	41 min
Dec 10, 10:26 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	49 min
Dec 10, 10:51 PM CST	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	39 min
Dec 10, 11:02 PM CST	Tornado Warning	LSX	Fayette	29 min
Dec 10, 11:10 PM CST	Tornado Warning	LSX	Clinton, Marion, Washington	50 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Every severe thunderstorm warning in 2021

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.