Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 15, NWS Chicago, IL

June 26, 2021Livingston County, Illinois

NWS Chicago, IL issued this tornado warning at Jun 26, 2021, 3:34 PM CDT for Livingston County, Illinois. It was in force for 41 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: Jun 26, 2021, 3:34 PM CDT (20:34 UTC)
Expired: Jun 26, 2021, 4:15 PM CDT
In force: 41 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Livingston County, IL

The radar

The Lincoln radar (KILX), 96 km from the middle of the area, began a volume at 20:35 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
Jun 26, 12:05 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.6 hours before the alert went out and 72 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: 683 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 684 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

778 
WFUS53 KLOT 262034
TORLOT
ILC105-262115-
/O.NEW.KLOT.TO.W.0015.210626T2034Z-210626T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Chicago/Romeoville
334 PM CDT Sat Jun 26 2021

The National Weather Service in Chicago has issued a

* Tornado Warning for...
  Central Livingston County in central Illinois...

* Until 415 PM CDT.
    
* At 334 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located near Chenoa, or 8 miles west of Fairbury, 
  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.

* This dangerous storm will be near...
  Fairbury around 350 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Pontiac.

Including the following interstate...
 I-55 between mile markers 189 and 195, and near mile marker 203.	
 
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 4076 8858 4076 8875 4094 8860 4082 8834
      4072 8858
TIME...MOT...LOC 2034Z 219DEG 21KT 4074 8868 

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

$$

Kluber

3 follow-up statements

906 
WWUS53 KLOT 262046
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
346 PM CDT Sat Jun 26 2021

ILC105-262115-
/O.CON.KLOT.TO.W.0015.000000T0000Z-210626T2115Z/
Livingston IL-
346 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR CENTRAL
LIVINGSTON COUNTY...
    
At 345 PM CDT, a severe thunderstorm capable of producing a tornado 
was located near Weston, or between Pontiac and Fairbury, 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.

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 4076 8871 4094 8860 4082 8834 4073 8858
      4076 8858
TIME...MOT...LOC 2045Z 228DEG 24KT 4079 8860 

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

$$

Kluber

130 
WWUS53 KLOT 262100
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
400 PM CDT Sat Jun 26 2021

ILC105-262115-
/O.CON.KLOT.TO.W.0015.000000T0000Z-210626T2115Z/
Livingston IL-
400 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR CENTRAL
LIVINGSTON COUNTY...
    
At 400 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairbury, 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...
Pontiac and Fairbury. 

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4076 8871 4094 8860 4082 8834 4073 8858
      4076 8858
TIME...MOT...LOC 2100Z 230DEG 20KT 4082 8850 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

RC

283 
WWUS53 KLOT 262116
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
416 PM CDT Sat Jun 26 2021

ILC105-262125-
/O.EXP.KLOT.TO.W.0015.000000T0000Z-210626T2115Z/
Livingston IL-
416 PM CDT Sat Jun 26 2021

...THE TORNADO WARNING FOR CENTRAL LIVINGSTON COUNTY HAS EXPIRED...
    
The Tornado Warning has been allowed to expire. However, damaging 
winds remain likely with tornadoes possible and a Severe 
Thunderstorm Warning remains in effect for the area. 

A Tornado Watch remains in effect until 700 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
Chicago.

LAT...LON 4076 8871 4094 8860 4082 8834 4073 8858
      4076 8858
TIME...MOT...LOC 2115Z 219DEG 21KT 4089 8843 

$$

RC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:01 PM CDT	Tornado Warning	LOT	Iroquois	31 min
Jun 25, 8:11 PM CDT	Tornado Warning	LOT	Iroquois	22 min
Jun 25, 8:37 PM CDT	Areal Flood Advisory	LOT	Ford, Iroquois, Kankakee, Livingston	5 hr
Jun 25, 9:11 PM CDT	Special Weather Statement	LOT	Ford	64 min
Jun 25, 10:39 PM CDT	Special Weather Statement	LOT	Ford	66 min
Jun 26, 11:27 AM CDT	Tornado Warning	LOT	Livingston	18 min
Jun 26, 11:34 AM CDT	Tornado Warning	LOT	Will	26 min
Jun 26, 11:44 AM CDT	Tornado Warning	LOT	Grundy, LaSalle, Livingston	36 min
Jun 26, 11:49 AM CDT	Tornado Warning	LOT	Cook	26 min
Jun 26, 11:55 AM CDT	Special Marine Warning	LOT		2 hr
Jun 26, 12:18 PM CDT	Flash Flood Warning	LOT	Cook, DuPage, Will	6 hr
Jun 26, 12:33 PM CDT	Special Marine Warning	LOT		117 min
Jun 26, 12:34 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Will	41 min
Jun 26, 12:59 PM CDT	Severe Thunderstorm Warning	LOT	Cook	11 min
Jun 26, 1:26 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Will	34 min
Jun 26, 2:08 PM CDT	Tornado Warning Tornado observed	LOT	Cook, Will	25 min
Jun 26, 2:24 PM CDT	Special Marine Warning	LOT		2 hr
Jun 26, 2:43 PM CDT	Areal Flood Advisory	LOT	Cook, Ford, Grundy, Iroquois, Kankakee, LaSalle and 2 more	6 hr
Jun 26, 3:31 PM CDT	Special Marine Warning	LOT		119 min
Jun 26, 3:50 PM CDT	Flash Flood Warning	LOT	Cook, Grundy, Kankakee, Will	6 hr
Jun 26, 3:56 PM CDT	Tornado Warning	LOT	Kankakee, Will	34 min
Jun 26, 3:57 PM CDT	Flash Flood Warning	LOT	Ford, Grundy, Iroquois, Kankakee, Livingston	6 hr
Jun 26, 3:57 PM CDT	Tornado Warning	LOT	Grundy, Kankakee, Livingston	33 min
Jun 26, 4:13 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Livingston	47 min
Jun 26, 4:23 PM CDT	Tornado Warning	LOT	Ford, Livingston	36 min
Jun 26, 4:26 PM CDT	River Flood Warning	LOT	Cook	28 hr
Jun 26, 4:26 PM CDT	Tornado Warning	LOT	Cook, Will	34 min
Jun 26, 4:30 PM CDT	Special Marine Warning	LOT		2 hr
Jun 26, 4:41 PM CDT	Tornado Warning	LOT	Kankakee	34 min
Jun 26, 4:49 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Kankakee, Will	56 min
Jun 26, 5:21 PM CDT	Severe Thunderstorm Warning	LOT	Will	54 min
Jun 26, 5:44 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	76 min
Jun 26, 5:54 PM CDT	Areal Flood Advisory	LOT	Ford, Iroquois, Livingston	3 hr
Jun 26, 6:23 PM CDT	Areal Flood Advisory	LOT	Cook, DuPage, Will	7 hr
Jun 26, 6:55 PM CDT	River Flood Warning	LOT	Livingston	3 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.