Alert archive / Indiana / Tornado Warnings in 2011

Tornado Warning 17, NWS Chicago, IL

June 15, 2011Cook County, Illinois; Lake County, Porter County, Indiana

NWS Chicago, IL issued this tornado warning at Jun 15, 2011, 6:28 PM CDT for Cook County, Illinois; Lake County, Porter County, Indiana. It was in force for 32 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 15, 2011, 6:28 PM CDT (23:28 UTC)
Expired: Jun 15, 2011, 7:00 PM CDT
In force: 32 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Cook County, IL, Lake County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 64 km from the middle of the area, began a volume at 23:29 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.5 hours before the alert went out and 265 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 559 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

727 
WFUS53 KLOT 152328
TORLOT
ILC031-INC089-127-160015-
/O.NEW.KLOT.TO.W.0017.110615T2328Z-110616T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
628 PM CDT WED JUN 15 2011

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN COOK COUNTY...
  NORTHERN LAKE COUNTY...
  NORTHWESTERN PORTER COUNTY...

* UNTIL 715 PM CDT

* AT 624 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CALUMET CITY...AND MOVING EAST AT 20 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  WHITING AROUND 635 PM.
  EAST CHICAGO AROUND 640 PM.
  GARY AROUND 655 PM.
  OGDEN DUNES AROUND 715 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4164 8705 4148 8756 4164 8768 4171 8752
      4168 8747 4169 8742 4167 8741 4165 8742
      4163 8735 4163 8722 4164 8717 4166 8715
      4165 8712 4166 8707
TIME...MOT...LOC 2328Z 251DEG 16KT 4161 8751

$$

RODRIGUEZ

3 follow-up statements

253 
WWUS53 KLOT 152332
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
632 PM CDT WED JUN 15 2011

ILC031-INC089-127-160015-
/O.CON.KLOT.TO.W.0017.000000T0000Z-110616T0015Z/
PORTER IN-COOK IL-LAKE IN-
632 PM CDT WED JUN 15 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN LAKE...
SOUTHEASTERN COOK AND NORTHWESTERN PORTER COUNTIES UNTIL 715 PM
CDT...

AT 629 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED NEAR CALUMET CITY...MOVING EAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  EAST CHICAGO AROUND 640 PM CDT.
  GARY AROUND 655 PM CDT.
  OGDEN DUNES AROUND 715 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4164 8705 4148 8756 4164 8768 4171 8752
      4168 8747 4169 8742 4167 8741 4165 8742
      4163 8735 4163 8722 4164 8717 4166 8715
      4165 8712 4166 8707
TIME...MOT...LOC 2332Z 251DEG 16KT 4161 8749

$$

RODRIGUEZ

308 
WWUS53 KLOT 152347
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
647 PM CDT WED JUN 15 2011

ILC031-152356-
/O.CAN.KLOT.TO.W.0017.000000T0000Z-110616T0015Z/
COOK IL-
647 PM CDT WED JUN 15 2011

...THE TORNADO WARNING FOR SOUTHEASTERN COOK COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4164 8705 4153 8740 4165 8751 4168 8747
      4169 8742 4167 8741 4165 8742 4163 8735
      4163 8722 4164 8717 4166 8715 4165 8712
      4166 8707
TIME...MOT...LOC 2346Z 251DEG 16KT 4164 8741

$$

INC089-127-160015-
/O.CON.KLOT.TO.W.0017.000000T0000Z-110616T0015Z/
PORTER IN-LAKE IN-
647 PM CDT WED JUN 15 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN LAKE AND
NORTHWESTERN PORTER COUNTIES UNTIL 715 PM CDT...

AT 641 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED NEAR EAST CHICAGO...MOVING EAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  GARY AROUND 655 PM CDT.
  OGDEN DUNES AROUND 715 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4164 8705 4153 8740 4165 8751 4168 8747
      4169 8742 4167 8741 4165 8742 4163 8735
      4163 8722 4164 8717 4166 8715 4165 8712
      4166 8707
TIME...MOT...LOC 2346Z 251DEG 16KT 4164 8741

$$

RODRIGUEZ

428 
WWUS53 KLOT 160000
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
700 PM CDT WED JUN 15 2011

INC089-127-160009-
/O.CAN.KLOT.TO.W.0017.000000T0000Z-110616T0015Z/
PORTER IN-LAKE IN-
700 PM CDT WED JUN 15 2011

...THE TORNADO WARNING FOR NORTHEASTERN LAKE AND NORTHWESTERN PORTER
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN CHICAGO.

LAT...LON 4164 8705 4153 8740 4165 8751 4168 8747
      4169 8742 4167 8741 4165 8742 4163 8735
      4163 8722 4164 8717 4166 8715 4165 8712
      4166 8707
TIME...MOT...LOC 2359Z 251DEG 16KT 4166 8734

$$

RODRIGUEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 2:53 AM CDT	Severe Thunderstorm Warning	LOT	Grundy, LaSalle, Livingston	37 min
Jun 15, 3:40 AM CDT	Special Weather Statement	LOT	Kankakee, Will	65 min
Jun 15, 4:35 AM CDT	Areal Flood Advisory	LOT	Ford, Iroquois, Livingston	5 hr
Jun 15, 5:39 AM CDT	Severe Thunderstorm Warning	LOT	Iroquois	66 min
Jun 15, 6:04 AM CDT	Special Marine Warning	LOT		116 min
Jun 15, 8:10 AM CDT	Special Marine Warning	LOT		106 min
Jun 15, 9:40 AM CDT	Rip Current Statement	LOT	Lake	3 hr
Jun 15, 6:54 PM CDT	Tornado Warning	LOT	Kankakee	51 min

Nearby

Tornado Warnings in Indiana, 2011 Tornado Warnings in Illinois, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.