Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 31, NWS Lincoln, IL

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

NWS Lincoln, IL issued this tornado warning at Jul 10, 2021, 2:45 PM CDT for Cass County, Mason County, Menard County, Illinois. It was in force for 60 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: Jul 10, 2021, 2:45 PM CDT (19:45 UTC)
Expired: Jul 10, 2021, 3:45 PM CDT
In force: 60 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

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

The radar

The Lincoln radar (KILX), 61 km from the middle of the area, began a volume at 19:48 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
Jul 10, 2:50 PM CDT	TSTM WND DMG	Chandlerville, IL	DELAYED REPORT. TREE BLOWN DOWN ACROSS ROAD.
Jul 10, 3:16 PM CDT	TORNADO	3 Sw Newmansville, IL	BRIEF TOUCHDOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 123 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

401 
WFUS53 KILX 101945
TORILX
ILC017-125-129-102045-
/O.NEW.KILX.TO.W.0031.210710T1945Z-210710T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
245 PM CDT Sat Jul 10 2021

The National Weather Service in Lincoln has issued a

* Tornado Warning for...
  Northwestern Menard County in central Illinois...
  Northeastern Cass County in west central Illinois...
  South central Mason County in central Illinois...

* Until 345 PM CDT.
    
* At 244 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located between Chandlerville and Virginia, moving 
  northeast at 25 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...
  Kilbourne.
  Oakford.
  Chandlerville.
  Atterberry.

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.

&&

LAT...LON 3994 9015 4004 9022 4023 8989 4005 8977
TIME...MOT...LOC 1944Z 238DEG 20KT 4000 9014 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Barnes

2 follow-up statements

762 
WWUS53 KILX 102024
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
324 PM CDT Sat Jul 10 2021

ILC017-125-129-102045-
/O.CON.KILX.TO.W.0031.000000T0000Z-210710T2045Z/
Menard-Cass-Mason-
324 PM CDT Sat Jul 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR
NORTHWESTERN MENARD...NORTHEASTERN CASS AND SOUTH CENTRAL MASON
COUNTIES...
    
At 323 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Atterberry, moving northeast at 20 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...
Kilbourne, Oakford, Newmansville and Atterberry. 

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.

&&

LAT...LON 3996 9007 4014 9005 4023 8989 4005 8977
TIME...MOT...LOC 2023Z 250DEG 12KT 4007 8996 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Barnes

454 
WWUS53 KILX 102034
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
334 PM CDT Sat Jul 10 2021

ILC017-102043-
/O.CAN.KILX.TO.W.0031.000000T0000Z-210710T2045Z/
Cass-
334 PM CDT Sat Jul 10 2021

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

LAT...LON 3999 8998 4018 8998 4023 8989 4005 8977
TIME...MOT...LOC 2033Z 243DEG 19KT 4009 8989 

$$

ILC125-129-102045-
/O.CON.KILX.TO.W.0031.000000T0000Z-210710T2045Z/
Menard-Mason-
334 PM CDT Sat Jul 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR
NORTHWESTERN MENARD AND SOUTH CENTRAL MASON COUNTIES...
    
At 333 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Atterberry, moving northeast at 20 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...
Oakford and Atterberry. 

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.

&&

LAT...LON 3999 8998 4018 8998 4023 8989 4005 8977
TIME...MOT...LOC 2033Z 243DEG 19KT 4009 8989 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Barnes

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:03 PM CDT	Severe Thunderstorm Warning	ILX	Schuyler	57 min
Jul 9, 10:50 PM CDT	Special Weather Statement	ILX	Sangamon	25 min
Jul 9, 11:11 PM CDT	Areal Flood Advisory	ILX	Sangamon	115 min
Jul 9, 11:43 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Moultrie, Shelby	47 min
Jul 10, 1:18 AM CDT	Special Weather Statement	ILX	Clay, Richland	57 min
Jul 10, 9:27 AM CDT	River Flood Warning	ILX	Clay, Richland	11 days
Jul 10, 2:08 PM CDT	Tornado Warning	ILX	Cass, Mason, Morgan	52 min
Jul 10, 2:53 PM CDT	Tornado Warning	ILX	Fulton, Mason	52 min
Jul 10, 3:38 PM CDT	Tornado Warning	ILX	Logan, Mason, Menard	37 min
Jul 10, 6:18 PM CDT	Flash Flood Warning	ILX	Clay	3 hr
Jul 10, 6:22 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Richland	53 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.