Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 19, NWS Chicago, IL

June 26, 2021Cook County, Will County, Illinois; Lake County, Indiana

NWS Chicago, IL issued this tornado warning at Jun 26, 2021, 4:26 PM CDT for Cook County, Will County, Illinois; Lake County, Indiana. It was in force for 34 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: Jun 26, 2021, 4:26 PM CDT (21:26 UTC)
Expired: Jun 26, 2021, 5:00 PM CDT
In force: 34 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cook County, IL, Will County, IL, Lake County, IN

The radar

The Chicago radar (KLOT), 45 km from the middle of the area, began a volume at 21:27 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
Jun 26, 4:32 PM CDT	FUNNEL CLOUD	1 W Goodenow, IL	NUMEROUS REPORTS OF A ROTATING FUNNEL CLOUD NORTH OF BEECHER.

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
Jun 26, 12:05 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.4 hours before the alert went out and 164 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.

694 
WFUS53 KLOT 262126
TORLOT
ILC031-197-INC089-262200-
/O.NEW.KLOT.TO.W.0019.210626T2126Z-210626T2200Z/

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

The National Weather Service in Chicago has issued a

* Tornado Warning for...
  East central Will County in northeastern Illinois...
  Southeastern Cook County in northeastern Illinois...
  West central Lake County in northwestern Indiana...

* Until 500 PM CDT.
    
* At 426 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Beecher, or near Peotone, 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...
  Crete, University Park and Beecher around 435 PM CDT.
  Steger and St. John around 445 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Sauk Village, Lynwood, Ford Heights, Schererville, Crown Point, Dyer,
Merrillville, Highland, Munster and Griffith.

This includes...  Illiana Motor Speedway.

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 4132 8768 4136 8776 4161 8757 4147 8731
TIME...MOT...LOC 2126Z 232DEG 27KT 4135 8769 

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

$$

Kluber

3 follow-up statements

226 
WWUS53 KLOT 262136
SVSLOT

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

ILC031-197-INC089-262200-
/O.CON.KLOT.TO.W.0019.000000T0000Z-210626T2200Z/
Will IL-Cook IL-Lake IN-
436 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR EAST
CENTRAL WILL...SOUTHEASTERN COOK AND WEST CENTRAL LAKE COUNTIES...
        
At 435 PM CDT, a severe thunderstorm capable of producing a tornado 
was located over Goodenow, or near Crete, moving northeast at 35 mph.

HAZARD...Tornado.

SOURCE...Weather spotters reported a funnel cloud near Goodenow.

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...
  Chicago Heights, St. John, Sauk Village, Lynwood, Glenwood and 
  Ford Heights around 445 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Crown Point, Dyer, Schererville, Lansing, Highland, Munster,
Merrillville and Griffith.

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 4135 8761 4141 8769 4161 8757 4147 8731
TIME...MOT...LOC 2135Z 227DEG 29KT 4142 8761 

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

$$

Kluber

572 
WWUS53 KLOT 262148
SVSLOT

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

ILC031-197-262158-
/O.CAN.KLOT.TO.W.0019.000000T0000Z-210626T2200Z/
Will IL-Cook IL-
448 PM CDT Sat Jun 26 2021

...THE TORNADO WARNING FOR EAST CENTRAL WILL AND SOUTHEASTERN COOK
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

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

LAT...LON 4145 8752 4145 8753 4159 8752 4148 8734
TIME...MOT...LOC 2148Z 222DEG 27KT 4149 8750 

$$

INC089-262200-
/O.CON.KLOT.TO.W.0019.000000T0000Z-210626T2200Z/
Lake IN-
448 PM CDT Sat Jun 26 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR WEST
CENTRAL LAKE COUNTY...
    
At 448 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Dyer, 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...
  Highland around 455 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Merrillville and Griffith.

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 4145 8752 4145 8753 4159 8752 4148 8734
TIME...MOT...LOC 2148Z 222DEG 27KT 4149 8750 

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

$$

Kluber

378 
WWUS53 KLOT 262157
SVSLOT

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

INC089-262207-
/O.EXP.KLOT.TO.W.0019.000000T0000Z-210626T2200Z/
Lake IN-
457 PM CDT Sat Jun 26 2021

...THE TORNADO WARNING FOR WEST CENTRAL LAKE COUNTY WILL EXPIRE AT
500 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds are still possible with
this thunderstorm.

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

LAT...LON 4145 8752 4145 8753 4159 8752 4148 8734
TIME...MOT...LOC 2157Z 232DEG 27KT 4151 8746 

$$

Kluber

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, 3:34 PM CDT	Tornado Warning	LOT	Livingston	41 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, 4:30 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
Jun 26, 1:56 PM CDT	Special Weather Statement	LOT	Porter	34 min
Jun 26, 2:27 PM CDT	Severe Thunderstorm Warning	LOT	Jasper, Lake, Newton, Porter	48 min
Jun 26, 5:19 PM CDT	Tornado Warning	LOT	Lake, Porter	13 min
Jun 26, 6:14 PM CDT	Severe Thunderstorm Warning	LOT	Benton, Jasper, Newton	76 min

Nearby

Tornado Warnings in Illinois, 2021 Tornado Warnings in Indiana, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.