Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Lincoln, IL

August 12, 20216 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 12, 2021, 4:29 PM CDT for 6 counties in Illinois. It was in force for 46 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: Aug 12, 2021, 4:29 PM CDT (21:29 UTC)
Expired: Aug 12, 2021, 5:15 PM CDT
In force: 46 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Clark County, IL, Crawford County, IL, Cumberland County, IL, Effingham County, IL, Jasper County, IL, Shelby County, IL

The radar

The Evansville,IN radar (KVWX), 98 km from the middle of the area, began a volume at 21:31 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 125 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: 1191 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1149 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

998 
WUUS53 KILX 122129
SVRILX
ILC023-033-035-049-079-173-122215-
/O.NEW.KILX.SV.W.0091.210812T2129Z-210812T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
429 PM CDT Thu Aug 12 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Western Crawford County in east central Illinois...
  Jasper County in southeastern Illinois...
  Southwestern Clark County in east central Illinois...
  Southeastern Shelby County in central Illinois...
  Cumberland County in east central Illinois...
  Northeastern Effingham County in south central Illinois...

* Until 515 PM CDT.

* At 429 PM CDT, a severe thunderstorm was located over Jewett, or
  near Toledo, moving southeast at 50 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Greenup around 435 PM CDT.
  Hidalgo around 440 PM CDT.
  Hazel Dell around 445 PM CDT.

Other locations in the path of this severe thunderstorm include
Oblong, Eaton and Annapolis.

This includes the following highways...
 Interstate 57 between mile markers 158 and 179.
 Interstate 70 between mile markers 92 and 131.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3885 8792 3885 8808 3911 8861 3937 8851
      3937 8802 3925 8765
TIME...MOT...LOC 2129Z 293DEG 45KT 3922 8829 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SB

3 follow-up statements

890 
WWUS53 KILX 122148
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
448 PM CDT Thu Aug 12 2021

ILC049-173-122157-
/O.CAN.KILX.SV.W.0091.000000T0000Z-210812T2215Z/
Shelby-Effingham-
448 PM CDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SHELBY AND
NORTHEASTERN EFFINGHAM COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3885 8792 3885 8808 3898 8835 3937 8836
      3937 8802 3925 8765
TIME...MOT...LOC 2147Z 293DEG 45KT 3913 8801 

$$

ILC023-033-035-079-122215-
/O.CON.KILX.SV.W.0091.000000T0000Z-210812T2215Z/
Crawford-Jasper-Clark-Cumberland-
448 PM CDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR WESTERN CRAWFORD...JASPER...SOUTHWESTERN CLARK AND CUMBERLAND
COUNTIES...

At 447 PM CDT, a severe thunderstorm was located near Hazel Dell, or
12 miles northeast of Newton, moving southeast at 50 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Oblong, Eaton and Annapolis.

This includes Interstate 70 between mile markers 106 and 131.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3885 8792 3885 8808 3898 8835 3937 8836
      3937 8802 3925 8765
TIME...MOT...LOC 2147Z 293DEG 45KT 3913 8801 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SB

234 
WWUS53 KILX 122157
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
457 PM CDT Thu Aug 12 2021

ILC035-122207-
/O.CAN.KILX.SV.W.0091.000000T0000Z-210812T2215Z/
Cumberland-
457 PM CDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CUMBERLAND COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3885 8792 3885 8808 3896 8832 3917 8814
      3918 8801 3922 8801 3922 8800 3936 8801
      3925 8765
TIME...MOT...LOC 2157Z 293DEG 45KT 3908 8786 

$$

ILC023-033-079-122215-
/O.CON.KILX.SV.W.0091.000000T0000Z-210812T2215Z/
Crawford-Jasper-Clark-
457 PM CDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR WESTERN CRAWFORD...JASPER AND SOUTHWESTERN CLARK COUNTIES...

At 457 PM CDT, a severe thunderstorm was located near Eaton, or 8
miles northwest of Robinson, moving southeast at 50 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Newton, Casey, Oblong, Ste. Marie, Willow Hill, Hidalgo, Annapolis,
Eaton, West Liberty, Hunt City, Orange, Stoy, Yale, Rose Hill, Sam
Parr State Park and Bellair.

This includes Interstate 70 between mile markers 128 and 130.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3885 8792 3885 8808 3896 8832 3917 8814
      3918 8801 3922 8801 3922 8800 3936 8801
      3925 8765
TIME...MOT...LOC 2157Z 293DEG 45KT 3908 8786 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SB

169 
WWUS53 KILX 122216
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
516 PM CDT Thu Aug 12 2021

ILC023-033-079-122226-
/O.EXP.KILX.SV.W.0091.000000T0000Z-210812T2215Z/
Crawford-Jasper-Clark-
516 PM CDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CRAWFORD...JASPER AND
SOUTHWESTERN CLARK COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
nearby areas.

LAT...LON 3885 8792 3885 8808 3896 8832 3917 8814
      3918 8801 3922 8801 3922 8800 3936 8801
      3925 8765
TIME...MOT...LOC 2216Z 293DEG 45KT 3899 8758 

$$

SB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 2:45 AM CDT	Heat Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 22 more	15 hr
Aug 12, 2:59 AM CDT	Special Weather Statement	ILX	McLean	46 min
Aug 12, 3:14 AM CDT	Severe Thunderstorm Warning	ILX	McLean	31 min
Aug 12, 3:51 AM CDT	Special Weather Statement	ILX	McLean	24 min
Aug 12, 4:02 AM CDT	Special Weather Statement	ILX	Tazewell	43 min
Aug 12, 4:26 AM CDT	Severe Thunderstorm Warning	ILX	Logan, McLean, Tazewell	21 min
Aug 12, 8:12 AM CDT	Special Weather Statement	ILX	McLean	48 min
Aug 12, 9:13 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, McLean	47 min
Aug 12, 9:24 AM CDT	Areal Flood Advisory	ILX	DeWitt, McLean, Piatt	3 hr
Aug 12, 10:04 AM CDT	Flash Flood Warning	ILX	Champaign, McLean	5 hr
Aug 12, 10:52 AM CDT	Severe Thunderstorm Warning	ILX	Champaign	38 min
Aug 12, 11:17 AM CDT	Flash Flood Warning	ILX	Champaign, DeWitt, Piatt	3 hr
Aug 12, 11:26 AM CDT	Special Weather Statement	ILX	Fulton, Tazewell	49 min
Aug 12, 12:16 PM CDT	Special Weather Statement	ILX	Logan	44 min
Aug 12, 1:05 PM CDT	Special Weather Statement	ILX	Vermilion	40 min
Aug 12, 1:45 PM CDT	Special Weather Statement	ILX	Champaign, Piatt	45 min
Aug 12, 2:16 PM CDT	Flash Flood Warning	ILX	Champaign, DeWitt, Piatt	119 min
Aug 12, 2:23 PM CDT	Special Weather Statement	ILX	Champaign	52 min
Aug 12, 2:35 PM CDT	Special Weather Statement	ILX	Christian, Morgan, Sangamon	25 min
Aug 12, 2:43 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Sangamon	47 min
Aug 12, 2:53 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	37 min
Aug 12, 3:01 PM CDT	Areal Flood Warning	ILX	Champaign, McLean	6 hr
Aug 12, 3:08 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Moultrie, Shelby	52 min
Aug 12, 3:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Coles, Cumberland, Effingham, Moultrie, Shelby	47 min
Aug 12, 4:15 PM CDT	Flash Flood Warning	ILX	Douglas, Moultrie, Shelby	3 hr
Aug 12, 5:09 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Jasper	36 min
Aug 12, 5:28 PM CDT	Special Weather Statement	ILX	Scott	32 min
Aug 12, 5:30 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Scott	18 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.