Alert archive / Illinois / Tornado Warnings in 2022

Tornado Warning 7, NWS Lincoln, IL

August 20, 2022McLean County, Woodford County, Illinois

NWS Lincoln, IL issued this tornado warning at Aug 20, 2022, 4:41 PM CDT for McLean County, Woodford County, Illinois. It was in force for 18 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 20, 2022, 4:41 PM CDT (21:41 UTC)
Expired: Aug 20, 2022, 4:59 PM CDT
In force: 18 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties McLean County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 75 km from the middle of the area, began a volume at 21:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 20, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 69 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: 78 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

539 
WFUS53 KILX 202141
TORILX
ILC113-203-202215-
/O.NEW.KILX.TO.W.0007.220820T2141Z-220820T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
441 PM CDT Sat Aug 20 2022

The National Weather Service in Lincoln has issued a

* Tornado Warning for...
  East central Woodford County in central Illinois...
  North central McLean County in central Illinois...

* Until 515 PM CDT.
    
* At 437 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Gridley, or 16 miles southwest of Pontiac, moving
  east 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.

* This dangerous storm will be near...
  Chenoa around 505 PM CDT.

This includes Interstate 55 between mile markers 182 and 186.
 
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 4075 8893 4075 8872 4067 8868 4068 8897
      4075 8900 4078 8893
TIME...MOT...LOC 2137Z 256DEG 18KT 4073 8889 

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

$$

Auten

2 follow-up statements

957 
WWUS53 KILX 202142
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
442 PM CDT Sat Aug 20 2022

ILC203-202152-
/O.CAN.KILX.TO.W.0007.000000T0000Z-220820T2215Z/
Woodford-
442 PM CDT Sat Aug 20 2022

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

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
central Illinois.

LAT...LON 4067 8868 4068 8889 4075 8892 4075 8872
TIME...MOT...LOC 2142Z 256DEG 18KT 4074 8886 

$$

ILC113-202215-
/O.CON.KILX.TO.W.0007.000000T0000Z-220820T2215Z/
McLean-
442 PM CDT Sat Aug 20 2022

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTH
CENTRAL MCLEAN COUNTY...
    
At 442 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Gridley, or 14 miles southwest of Pontiac, moving
east 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...
  Chenoa.

This includes Interstate 55 between mile markers 182 and 186.
 
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 4067 8868 4068 8889 4075 8892 4075 8872
TIME...MOT...LOC 2142Z 256DEG 18KT 4074 8886 

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

$$

Auten

210 
WWUS53 KILX 202159
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
459 PM CDT Sat Aug 20 2022

ILC113-202209-
/O.CAN.KILX.TO.W.0007.000000T0000Z-220820T2215Z/
McLean-
459 PM CDT Sat Aug 20 2022

...THE TORNADO WARNING FOR NORTH CENTRAL MCLEAN COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
central Illinois.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Lincoln.

LAT...LON 4067 8868 4068 8889 4075 8892 4075 8872
TIME...MOT...LOC 2156Z 256DEG 18KT 4076 8875 

$$

Auten

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 11:44 PM CDT	Special Weather Statement	ILX	Fulton	31 min
Aug 20, 1:53 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Woodford	52 min
Aug 20, 2:33 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell, Woodford	42 min
Aug 20, 2:44 PM CDT	Tornado Warning	ILX	McLean, Tazewell, Woodford	31 min
Aug 20, 3:35 PM CDT	Flash Flood Warning	ILX	Tazewell, Woodford	3 hr
Aug 20, 5:52 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	38 min
Aug 20, 6:23 PM CDT	Special Weather Statement	ILX	DeWitt	37 min
Aug 20, 6:40 PM CDT	Special Weather Statement	ILX	Piatt	35 min

Nearby

Tornado Warnings in Illinois, 2022 Every tornado warning in 2022 Tornadoes in 2022

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.