Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 46, NWS Lincoln, IL

December 10, 2021Cass County, Mason County, Menard County, Illinois

NWS Lincoln, IL issued this tornado warning at Dec 10, 2021, 7:54 PM CST for Cass County, Mason County, Menard County, Illinois. It was in force for 40 min. 3 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, 7:54 PM CST (01:54 UTC)
Expired: Dec 10, 2021, 8:34 PM CST
In force: 40 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties Cass County, IL, Mason County, IL, Menard County, IL

The radar

The Lincoln radar (KILX), 36 km from the middle of the area, began a volume at 01:54 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, 7:54 PM CST	TORNADO	3 Nw Philadelphia, IL	AT LEAST ONE HOME WAS DAMAGED...WITH MAJOR STRUCTURAL DAMAGE TO SURROUNDING BUILDINGS.
Dec 10, 8:07 PM CST	TORNADO	Atterberry, IL	CORRECTS PREVIOUS TORNADO REPORT FROM ATTERBERRY. DELAYED REPORT...THE STORM THAT PRODUCED AN EF2 TORNADO IN CASS COUNTY RESULTED IN ANOTHER TOUCHDOWN IN MENARD COUNTY. IT BEGAN ABOUT A HALF MILE EAST OF ATTERBERRY, WHERE A PAIR OF METAL SHEDS ALONG PIN HOOK A
Dec 10, 8:07 PM CST	TORNADO	Atterberry, IL	DELAYED REPORT...PAIR OF METAL SHEDS WERE SIGNIFICANTLY DAMAGED.

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, 1.9 hours before the alert went out and 98 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.

908 
WFUS53 KILX 110154
TORILX
ILC017-125-129-110245-
/O.NEW.KILX.TO.W.0046.211211T0154Z-211211T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
754 PM CST Fri Dec 10 2021

The National Weather Service in Lincoln has issued a

* Tornado Warning for...
  Menard County in central Illinois...
  Southeastern Cass County in west central Illinois...
  Southeastern Mason County in central Illinois...

* Until 845 PM CST.
    
* At 754 PM CST, a tornado producing storm was located near Virginia,
  moving northeast at 55 mph.

  HAZARD...Damaging tornado.

  SOURCE...Radar confirmed tornado.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic storm will be near...
  Tallula around 805 PM CST.
  Petersburg around 810 PM CST.

Other locations in the path of this tornadic thunderstorm include
Greenview and Mason City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4001 8958 3989 9018 3996 9022
TIME...MOT...LOC 0154Z 242DEG 49KT 3995 9013 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

Shimon

6 follow-up statements

266 
WWUS53 KILX 110202
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
802 PM CST Fri Dec 10 2021

ILC017-125-129-110245-
/O.CON.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Cass-Mason-
802 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR MENARD...
SOUTHEASTERN CASS AND SOUTHEASTERN MASON COUNTIES...
        
At 801 PM CST, a confirmed tornado was located near Tallula, or 11
miles east of Virginia, moving northeast at 55 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Petersburg around 810 PM CST.

Other locations in the path of this tornadic thunderstorm include
Greenview and Mason City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4001 8958 3989 9018 3996 9022
TIME...MOT...LOC 0201Z 242DEG 49KT 4000 9001 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

Shimon

546 
WWUS53 KILX 110210
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
810 PM CST Fri Dec 10 2021

ILC017-110219-
/O.CAN.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Cass-
810 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR SOUTHEASTERN CASS COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for central
Illinois. A Tornado Watch also remains in effect until 200 AM CST for
central Illinois.

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4001 8958 3994 8998 4008 8998
TIME...MOT...LOC 0209Z 238DEG 49KT 4007 8991 

$$

ILC125-129-110245-
/O.CON.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Mason-
810 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR MENARD
AND SOUTHEASTERN MASON COUNTIES...
    
At 809 PM CST, a severe thunderstorm capable of producing a tornado
was located near Petersburg, or 14 miles southwest of Mason City,
moving northeast at 55 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Greenview around 820 PM CST.

Other locations in the path of this tornadic thunderstorm include
Mason City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4001 8958 3994 8998 4008 8998
TIME...MOT...LOC 0209Z 238DEG 49KT 4007 8991 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Shimon

522 
WWUS53 KILX 110215
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
815 PM CST Fri Dec 10 2021

ILC125-129-110245-
/O.CON.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Mason-
815 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR MENARD
AND SOUTHEASTERN MASON COUNTIES...
        
At 814 PM CST, a confirmed tornado was located near Greenview, or 10
miles southwest of Mason City, moving northeast at 55 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Greenview around 820 PM CST.
  Mason City around 825 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4001 8958 3994 8998 4008 8998
TIME...MOT...LOC 0214Z 241DEG 46KT 4010 8984 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

Shimon

114 
WWUS53 KILX 110221
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
821 PM CST Fri Dec 10 2021

ILC125-129-110245-
/O.CON.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Mason-
821 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR
NORTHEASTERN MENARD AND SOUTHEASTERN MASON COUNTIES...
        
At 821 PM CST, a confirmed tornado was located near Mason City,
moving northeast at 55 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
northeastern Menard and southeastern Mason Counties, including the
following locations... Sweetwater.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 8963 4014 8960 4009 8960 4009 8959
      4005 8962 4006 8978 4016 8984
TIME...MOT...LOC 0221Z 242DEG 49KT 4015 8973 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

Shimon

329 
WWUS53 KILX 110230
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
830 PM CST Fri Dec 10 2021

ILC125-129-110245-
/O.CON.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Mason-
830 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR
NORTHEASTERN MENARD AND EAST CENTRAL MASON COUNTIES...
    
At 829 PM CST, a severe thunderstorm capable of producing a tornado
was located near Mason City, moving northeast at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Mason City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4028 8963 4014 8960 4011 8960 4015 8970
      4023 8971
TIME...MOT...LOC 0229Z 246DEG 41KT 4018 8962 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Shimon

818 
WWUS53 KILX 110234
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
834 PM CST Fri Dec 10 2021

ILC125-129-110243-
/O.CAN.KILX.TO.W.0046.000000T0000Z-211211T0245Z/
Menard-Mason-
834 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR NORTHEASTERN MENARD AND EAST CENTRAL MASON
COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for central
Illinois. A Tornado Watch also remains in effect until 200 AM CST for
central Illinois.

LAT...LON 4028 8963 4014 8960 4011 8960 4015 8970
      4023 8971
TIME...MOT...LOC 0230Z 242DEG 49KT 4021 8954 

$$

Shimon

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 10, 7:15 PM CST	Tornado Warning	ILX	Cass, Morgan, Scott	45 min
Dec 10, 8:05 PM CST	Tornado Warning	ILX	Mason, Tazewell	40 min
Dec 10, 8:20 PM CST	Severe Thunderstorm Warning	ILX	Christian, Sangamon	40 min
Dec 10, 8:28 PM CST	Tornado Warning	ILX	Logan, Mason, Tazewell	32 min
Dec 10, 8:32 PM CST	Severe Thunderstorm Warning	ILX	Logan, Sangamon	28 min
Dec 10, 8:38 PM CST	Tornado Warning	ILX	McLean, Woodford	22 min
Dec 10, 8:50 PM CST	Tornado Warning	ILX	McLean	12 min
Dec 10, 8:58 PM CST	Severe Thunderstorm Warning	ILX	DeWitt, McLean, Macon, Moultrie, Piatt, Sangamon	47 min
Dec 10, 9:09 PM CST	Severe Thunderstorm Warning	ILX	Christian, Macon, Moultrie, Piatt, Shelby	66 min
Dec 10, 9:23 PM CST	Tornado Warning Tornado observed	ILX	Shelby	36 min
Dec 10, 9:33 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Piatt, Vermilion	42 min
Dec 10, 9:51 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Coles, Cumberland, Douglas, Moultrie, Piatt and 1 more	54 min
Dec 10, 9:55 PM CST	Tornado Warning	ILX	Coles, Douglas, Moultrie	19 min
Dec 10, 9:58 PM CST	Tornado Warning Tornado observed	ILX	Coles, Douglas, Moultrie	32 min
Dec 10, 10:24 PM CST	Severe Thunderstorm Warning	ILX	Champaign, Clark, Coles, Douglas, Edgar, Vermilion	35 min
Dec 10, 10:26 PM CST	Tornado Warning Tornado observed	ILX	Coles, Douglas, Edgar, Vermilion	19 min
Dec 10, 10:56 PM CST	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Effingham, Jasper, Moultrie, Shelby	49 min
Dec 10, 11:40 PM CST	Severe Thunderstorm Warning	ILX	Clark, Coles, Crawford, Cumberland, Edgar, Effingham and 2 more	65 min
Dec 11, 12:50 AM CST	Special Weather Statement	ILX	Lawrence	40 min

Nearby

Tornado Warnings in Illinois, 2021 Every tornado warning in 2021 Tornadoes 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.