Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 123, NWS Lincoln, IL

December 10, 2021Logan County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Dec 10, 2021, 8:32 PM CST for Logan County, Sangamon County, Illinois. It was in force for 28 min. 1 report 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, 8:32 PM CST (02:32 UTC)
Expired: Dec 10, 2021, 9:00 PM CST
In force: 28 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Logan County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 20 km from the middle of the area, began a volume at 02:33 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, 8:36 PM CST	TSTM WND DMG	1 Nw Buffalo, IL	SEVERAL POWER POLES BLOWN DOWN IN THE SAME DIRECTION. TIME ESTIMATED BY RADAR.

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
Dec 10, 7:47 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.5 hours before the alert went out and 65 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.

867 
WUUS53 KILX 110232
SVRILX
ILC107-167-110300-
/O.NEW.KILX.SV.W.0123.211211T0232Z-211211T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
832 PM CST Fri Dec 10 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Southeastern Logan County in central Illinois...
  Northeastern Sangamon County in central Illinois...

* Until 900 PM CST.

* At 831 PM CST, a severe thunderstorm was located over Cornland, or
  14 miles south of Lincoln, moving northeast at 65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Mount Pulaski around 840 PM CST.
  Latham and Chestnut around 845 PM CST.
  Beason around 850 PM CST.

This includes the following highways...
 Interstate 55 between mile markers 116 and 117.
 Interstate 72 between mile markers 105 and 114.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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

&&

LAT...LON 4004 8948 4019 8915 3992 8915 3992 8921
      3990 8922 3978 8959
TIME...MOT...LOC 0231Z 233DEG 58KT 3994 8944 

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

$$

37

1 follow-up statement

139 
WWUS53 KILX 110257
SVSILX

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

ILC107-167-110307-
/O.EXP.KILX.SV.W.0123.000000T0000Z-211211T0300Z/
Logan-Sangamon-
857 PM CST Fri Dec 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LOGAN AND
NORTHEASTERN SANGAMON COUNTIES WILL EXPIRE AT 900 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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 4004 8948 4019 8915 3992 8915 3992 8921
      3990 8922 3978 8959
TIME...MOT...LOC 0257Z 233DEG 58KT 4019 8901 

$$

37

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, 7:54 PM CST	Tornado Warning Tornado observed	ILX	Cass, Mason, Menard	40 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, 8:38 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

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.