Alert archive / Illinois / Tornado Warnings in 2020

Tornado Warning 13, NWS Chicago, IL

June 9, 2020Will County, Illinois; Lake County, Indiana

NWS Chicago, IL issued this tornado warning at Jun 9, 2020, 7:13 PM CDT for Will County, Illinois; Lake County, Indiana. It was in force for 47 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 9, 2020, 7:13 PM CDT (00:13 UTC)
Expired: Jun 9, 2020, 8:00 PM CDT
In force: 47 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Will County, IL, Lake County, IN

The radar

The Chicago radar (KLOT), 56 km from the middle of the area, began a volume at 00:14 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 9, 7:17 PM CDT	FUNNEL CLOUD	Beecher, IL	AMATUER RADIO OPERATOR REPORTS FUNNEL CLOUD IN THE VICINITY OF BEECHER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.2 hours before the alert went out and 172 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: 252 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1371 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 446 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 5.5

Open this sounding in Storm Lab

The text

As transmitted.

959 
WFUS53 KLOT 100013
TORLOT
ILC197-INC089-100100-
/O.NEW.KLOT.TO.W.0013.200610T0013Z-200610T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Chicago/Romeoville
713 PM CDT Tue Jun 9 2020

The National Weather Service in Chicago has issued a

* Tornado Warning for...
  Southeastern Will County in northeastern Illinois...
  Central Lake County in northwestern Indiana...

* Until 800 PM CDT.
    
* At 712 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Grant Park, or near Momence, moving northeast at 
  40 mph. Trained spotters have reported a funnel cloud with this 
  storm. 

  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...
  Beecher around 725 PM CDT.
  Cedar Lake and Lake Dalecarlia around 735 PM CDT.
  St. John and Dyer around 740 PM CDT.
  Schererville, Crown Point and Highland around 745 PM CDT.
  Merrillville, Griffith and Winfield around 750 PM CDT.
  Gary and Hobart around 800 PM CDT.

This includes...  Illiana Motor Speedway and Lake County Fairgrounds.
 
Including the following interstates...
 Indiana I-80 between mile markers 4 and 8.
 Indiana I-65 between mile markers 247 and 257.

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 4143 8722 4127 8753 4130 8753 4130 8775
      4147 8757 4147 8753 4152 8752 4161 8743
      4147 8722
TIME...MOT...LOC 0012Z 224DEG 33KT 4126 8766 

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

$$

Carlaw

3 follow-up statements

630 
WWUS53 KLOT 100027
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
727 PM CDT Tue Jun 9 2020

ILC197-INC089-100100-
/O.CON.KLOT.TO.W.0013.000000T0000Z-200610T0100Z/
Will IL-Lake IN-
727 PM CDT Tue Jun 9 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR EAST
CENTRAL WILL AND NORTHERN LAKE COUNTIES...
    
At 726 PM CDT, a severe thunderstorm capable of producing a tornado 
was located near St. John, moving northeast at 45 mph. Trained 
spotters had previously reported a funnel cloud with this storm.

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...
  Cedar Lake around 730 PM CDT.
  St. John and Dyer around 735 PM CDT.
  Schererville, Crown Point, Highland and Munster around 740 PM CDT.
  Merrillville and Griffith around 745 PM CDT.
  Gary and Hobart around 755 PM CDT.

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 4134 8754 4139 8762 4147 8757 4147 8753
      4152 8752 4161 8743 4149 8725
TIME...MOT...LOC 0026Z 221DEG 37KT 4141 8754 

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

$$

Carlaw

887 
WWUS53 KLOT 100035
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
735 PM CDT Tue Jun 9 2020

ILC197-100044-
/O.CAN.KLOT.TO.W.0013.000000T0000Z-200610T0100Z/
Will IL-
735 PM CDT Tue Jun 9 2020

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

LAT...LON 4142 8747 4144 8752 4152 8752 4161 8743
      4151 8728
TIME...MOT...LOC 0034Z 223DEG 33KT 4147 8747 

$$

INC089-100100-
/O.CON.KLOT.TO.W.0013.000000T0000Z-200610T0100Z/
Lake IN-
735 PM CDT Tue Jun 9 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR NORTHERN
LAKE COUNTY...
    
At 734 PM CDT, a severe thunderstorm capable of producing a tornado
was located over St. John, moving northeast at 40 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 740 PM CDT.
  Merrillville and Griffith around 745 PM CDT.
  Hobart around 755 PM CDT.
  Gary around 800 PM CDT.

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 4142 8747 4144 8752 4152 8752 4161 8743
      4151 8728
TIME...MOT...LOC 0034Z 223DEG 33KT 4147 8747 

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

$$

Carlaw

608 
WWUS53 KLOT 100054
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
754 PM CDT Tue Jun 9 2020

INC089-100102-
/O.EXP.KLOT.TO.W.0013.000000T0000Z-200610T0100Z/
Lake IN-
754 PM CDT Tue Jun 9 2020

...THE TORNADO WARNING FOR NORTHERN LAKE COUNTY WILL EXPIRE AT 800 PM
CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

An additional Tornado Warning remains in effect for far northwestern 
Lake County, including East Chicago, Hammond, and Whiting, until 830 
PM CDT.

LAT...LON 4142 8747 4144 8752 4152 8752 4161 8743
      4151 8728
TIME...MOT...LOC 0052Z 224DEG 33KT 4159 8732 

$$

Kluber

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:25 PM CDT	Special Marine Warning	LOT		95 min
Jun 9, 7:25 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Will	50 min
Jun 9, 7:47 PM CDT	Tornado Warning	LOT	Cook	18 min
Jun 9, 8:54 PM CDT	Special Marine Warning	LOT		96 min
Jun 10, 1:02 AM CDT	Small Craft Advisory	LOT		14 hr
Jun 10, 2:12 AM CDT	Special Weather Statement	LOT	Ogle	48 min
Jun 10, 2:23 AM CDT	Severe Thunderstorm Warning	LOT	Ogle	27 min
Jun 10, 2:40 AM CDT	Special Weather Statement	LOT	Winnebago	50 min
Jun 10, 7:29 AM CDT	Special Weather Statement	LOT	Ford	16 min
Jun 10, 7:47 AM CDT	Special Weather Statement	LOT	Ford	13 min
Jun 10, 8:01 AM CDT	Special Weather Statement	LOT	Kankakee, Will	29 min
Jun 10, 8:14 AM CDT	Severe Thunderstorm Warning	LOT	Cook, Kankakee, Will	76 min
Jun 10, 8:17 AM CDT	Special Marine Warning	LOT		3 hr
Jun 10, 9:00 AM CDT	Special Weather Statement	LOT	Iroquois	30 min
Jun 10, 9:35 AM CDT	Areal Flood Advisory	LOT	Cook	115 min
Jun 10, 2:40 PM CDT	Gale Warning	LOT		7 hr
Jun 10, 2:40 PM CDT	Small Craft Advisory	LOT		13 hr

Nearby

Tornado Warnings in Illinois, 2020 Tornado Warnings in Indiana, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.