Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 16, NWS Chicago, IL

June 26, 2021Kankakee County, Will County, Illinois

NWS Chicago, IL issued this tornado warning at Jun 26, 2021, 3:56 PM CDT for Kankakee County, Will County, Illinois. It was in force for 34 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, 3:56 PM CDT (20:56 UTC)
Expired
Jun 26, 2021, 4:30 PM CDT
In force
34 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Kankakee County, IL, Will County, IL

The radar

The Chicago radar (KLOT), 44 km from the middle of the area, began a volume at 20:55 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.

IssuedProductOfficeLasted
Jun 26, 12:05 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 135 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2021-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 683 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2021-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

968 
WFUS53 KLOT 262056
TORLOT
ILC091-197-262130-
/O.NEW.KLOT.TO.W.0016.210626T2056Z-210626T2130Z/

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

The National Weather Service in Chicago has issued a

* Tornado Warning for...
  Southeastern Will County in northeastern Illinois...
  North central Kankakee County in northeastern Illinois...

* Until 430 PM CDT.
    
* At 355 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Limestone, or near Bourbonnais, moving northeast
  at 30 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...
  Manteno around 410 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Peotone and Beecher.

This includes...  Will County Fairgrounds.
 
Including the following interstate...
 I-57 between mile markers 318 and 330.
 
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 4114 8796 4118 8801 4137 8790 4136 8757
TIME...MOT...LOC 2055Z 224DEG 26KT 4118 8796 

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

$$

Kluber
3 follow-up statements
589 
WWUS53 KLOT 262106
SVSLOT

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

ILC091-197-262130-
/O.CON.KLOT.TO.W.0016.000000T0000Z-210626T2130Z/
Will IL-Kankakee IL-
406 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
SOUTHEASTERN WILL AND NORTH CENTRAL KANKAKEE COUNTIES...
    
At 405 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Manteno, moving northeast at 30 mph.

HAZARD...Tornado.

SOURCE...Radar and spotter 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...
  Manteno around 415 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Peotone and Beecher.

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 4114 8796 4118 8801 4137 8790 4136 8757
TIME...MOT...LOC 2105Z 223DEG 25KT 4123 8790 

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

$$

Kluber
219 
WWUS53 KLOT 262115
SVSLOT

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

ILC091-197-262130-
/O.CON.KLOT.TO.W.0016.000000T0000Z-210626T2130Z/
Will IL-Kankakee IL-
415 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
SOUTHEASTERN WILL AND NORTHEASTERN KANKAKEE COUNTIES...
    
At 415 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Peotone, moving northeast at 35 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...
  Beecher.

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 4124 8778 4128 8787 4137 8783 4136 8757
TIME...MOT...LOC 2115Z 230DEG 31KT 4130 8778 

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

$$

Kluber
205 
WWUS53 KLOT 262132
SVSLOT

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

ILC091-197-262140-
/O.EXP.KLOT.TO.W.0016.000000T0000Z-210626T2130Z/
Will IL-Kankakee IL-
432 PM CDT Sat Jun 26 2021

...THE TORNADO WARNING FOR SOUTHEASTERN WILL AND NORTHEASTERN
KANKAKEE COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area. 
Therefore, the warning has been allowed to expire. A new tornado 
warning is in effect for the same storm across eastern Will County 
until 500 PM CDT.

A Tornado Watch remains in effect until 700 PM CDT for northeastern
Illinois.

LAT...LON 4124 8778 4128 8787 4137 8783 4136 8757
TIME...MOT...LOC 2130Z 224DEG 26KT 4138 8768 

$$

Kluber

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 8:01 PM CDTTornado WarningLOTIroquois31 min
Jun 25, 8:11 PM CDTTornado WarningLOTIroquois22 min
Jun 25, 8:37 PM CDTAreal Flood AdvisoryLOTFord, Iroquois, Kankakee, Livingston5 hr
Jun 25, 9:11 PM CDTSpecial Weather StatementLOTFord64 min
Jun 25, 10:39 PM CDTSpecial Weather StatementLOTFord66 min
Jun 26, 11:27 AM CDTTornado WarningLOTLivingston18 min
Jun 26, 11:34 AM CDTTornado WarningLOTWill26 min
Jun 26, 11:44 AM CDTTornado WarningLOTGrundy, LaSalle, Livingston36 min
Jun 26, 11:49 AM CDTTornado WarningLOTCook26 min
Jun 26, 11:55 AM CDTSpecial Marine WarningLOT2 hr
Jun 26, 12:18 PM CDTFlash Flood WarningLOTCook, DuPage, Will6 hr
Jun 26, 12:33 PM CDTSpecial Marine WarningLOT117 min
Jun 26, 12:34 PM CDTSevere Thunderstorm WarningLOTCook, Will41 min
Jun 26, 12:59 PM CDTSevere Thunderstorm WarningLOTCook11 min
Jun 26, 1:26 PM CDTSevere Thunderstorm WarningLOTCook, Will34 min
Jun 26, 2:08 PM CDTTornado Warning Tornado observedLOTCook, Will25 min
Jun 26, 2:24 PM CDTSpecial Marine WarningLOT2 hr
Jun 26, 2:43 PM CDTAreal Flood AdvisoryLOTCook, Ford, Grundy, Iroquois, Kankakee, LaSalle and 2 more6 hr
Jun 26, 3:31 PM CDTSpecial Marine WarningLOT119 min
Jun 26, 3:34 PM CDTTornado WarningLOTLivingston41 min
Jun 26, 3:50 PM CDTFlash Flood WarningLOTCook, Grundy, Kankakee, Will6 hr
Jun 26, 3:57 PM CDTFlash Flood WarningLOTFord, Grundy, Iroquois, Kankakee, Livingston6 hr
Jun 26, 3:57 PM CDTTornado WarningLOTGrundy, Kankakee, Livingston33 min
Jun 26, 4:13 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston47 min
Jun 26, 4:23 PM CDTTornado WarningLOTFord, Livingston36 min
Jun 26, 4:26 PM CDTRiver Flood WarningLOTCook28 hr
Jun 26, 4:26 PM CDTTornado WarningLOTCook, Will34 min
Jun 26, 4:30 PM CDTSpecial Marine WarningLOT2 hr
Jun 26, 4:41 PM CDTTornado WarningLOTKankakee34 min
Jun 26, 4:49 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Kankakee, Will56 min
Jun 26, 5:21 PM CDTSevere Thunderstorm WarningLOTWill54 min
Jun 26, 5:44 PM CDTSevere Thunderstorm WarningLOTIroquois76 min
Jun 26, 5:54 PM CDTAreal Flood AdvisoryLOTFord, Iroquois, Livingston3 hr
Jun 26, 6:23 PM CDTAreal Flood AdvisoryLOTCook, DuPage, Will7 hr
Jun 26, 6:55 PM CDTRiver Flood WarningLOTLivingston3 days

Nearby

Tornado Warnings in Illinois, 2021Every tornado warning in 2021Tornadoes 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.