Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Lincoln, IL

August 12, 2021Clark County, Crawford County, Jasper County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 12, 2021, 5:09 PM CDT for Clark County, Crawford County, Jasper County, Illinois. It was in force for 36 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, 5:09 PM CDT (22:09 UTC)
Expired: Aug 12, 2021, 5:45 PM CDT
In force: 36 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clark County, IL, Crawford County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 87 km from the middle of the area, began a volume at 22:08 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, 10.2 hours before the alert went out and 150 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.

822 
WUUS53 KILX 122209
SVRILX
ILC023-033-079-122245-
/O.NEW.KILX.SV.W.0092.210812T2209Z-210812T2245Z/

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

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Crawford County in east central Illinois...
  Southeastern Jasper County in southeastern Illinois...
  Southeastern Clark County in east central Illinois...

* Until 545 PM CDT.

* At 509 PM CDT, a severe thunderstorm was located over Eaton, or
  near Robinson, moving east at 35 mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Robinson, Hutsonville and New Hebron around 520 PM CDT.

Other locations in the path of this severe thunderstorm include
Palestine.

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 3889 8754 3885 8754 3885 8808 3927 8781
      3925 8757 3922 8757 3914 8766 3912 8763
      3911 8765 3910 8762 3909 8762 3906 8757
      3900 8758 3899 8756 3899 8758 3896 8751
      3890 8752
TIME...MOT...LOC 2209Z 290DEG 31KT 3909 8781 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SB

1 follow-up statement

690 
WWUS53 KILX 122243
SVSILX

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

ILC023-033-079-122252-
/O.EXP.KILX.SV.W.0092.000000T0000Z-210812T2245Z/
Crawford-Jasper-Clark-
543 PM CDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CRAWFORD...SOUTHEASTERN JASPER
AND SOUTHEASTERN CLARK COUNTIES WILL EXPIRE AT 545 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 3889 8754 3885 8754 3885 8808 3927 8781
      3925 8757 3922 8757 3914 8766 3912 8763
      3911 8765 3910 8762 3909 8762 3906 8757
      3900 8758 3899 8756 3899 8758 3896 8751
      3890 8752
TIME...MOT...LOC 2242Z 290DEG 31KT 3899 8747 

$$

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, 4:29 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Effingham, Jasper, Shelby	46 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.