Alert archive / Illinois / Tornado Warnings in 2010

Tornado Warning 21, NWS Chicago, IL

June 23, 2010Cook County, DuPage County, Illinois

NWS Chicago, IL issued this tornado warning at Jun 23, 2010, 5:39 PM CDT for Cook County, DuPage County, Illinois. It was in force for 66 min. 10 reports 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 23, 2010, 5:39 PM CDT (22:39 UTC)
Expired
Jun 23, 2010, 6:45 PM CDT
In force
66 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon

Counties Cook County, IL, DuPage County, IL

The radar

The Chicago radar (KLOT), 44 km from the middle of the area, began a volume at 22:39 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

TimeReportWhereRemark
Jun 23, 5:40 PM CDTHAIL 0.88Oak Brook, ILACCOMPANIED BY HEAVY RAIN AND PONDING ON ROAD.
Jun 23, 5:45 PM CDTTSTM WND DMGOak Brook, ILMEDIA REPORTS OF DAMAGE ON 22ND STREET IN OAKBROOK INCLUDE ROOF OFF BUILDING...POWER POLES AND STREET LIGHTS DOWN...AND LARGE TREE DOWN BLOCKING 22ND STREET.
Jun 23, 5:55 PM CDTHAIL 11 N La Grange, IL
Jun 23, 5:57 PM CDTTSTM WND DMGChicago, ILROOF DAMAGE AND TREES DOWN AT 27TH AND KEDZIE. TIME RADAR EST.
Jun 23, 6:00 PM CDTTSTM WND GST 60North Riverside, ILTIME ESTIMATED. POWER IS OUT.
Jun 23, 6:17 PM CDTTSTM WND GST 64Midway Airport, ILMEASURED GUST TO 64 MPH AT MIDWAY AIRPORT.
Jun 23, 6:20 PM CDTTSTM WND DMGChicago, ILLARGE 6-8 INCH DIAMETER LIMBS DOWN ON 59TH ST. BETWEN CICERO AND PULASKI. SOME STREETS IMPASSABLE.
Jun 23, 6:21 PM CDTTSTM WND GST 60Chicago, ILTREES LEANING 40 DEGREES. ESTIMATED 60MPH.
Jun 23, 6:22 PM CDTTSTM WND GST 75Chicago, ILNEAR MIDWAY AIRPORT.
Jun 23, 6:24 PM CDTTSTM WND GST 73Midway Airport, ILMEASURED GUST TO 73 MPH AT MIDWAY AIRPORT.

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.

IssuedProductOfficeLasted
Jun 23, 2:10 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 203 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 2010-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1735 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 2010-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
1735 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1302 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

The text

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

578 
WFUS53 KLOT 232239
TORLOT
ILC031-043-232345-
/O.NEW.KLOT.TO.W.0021.100623T2239Z-100623T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
539 PM CDT WED JUN 23 2010

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL COOK COUNTY...
  EAST CENTRAL DUPAGE COUNTY...

* UNTIL 645 PM CDT

* AT 534 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR OAK BROOK...AND MOVING EAST AT 25 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
  WESTCHESTER...LA GRANGE...BELLWOOD AND COUNTRYSIDE AROUND 545 PM.
  RIVERSIDE...NORTH RIVERSIDE...BROOKFIELD AND LYONS AROUND 550 PM.
  BERWYN...STICKNEY...FOREST VIEW AND OAK PARK AROUND 555 PM.
  CICERO AND MIDWAY AIRPORT AROUND 600 PM.
  HUMBOLDT PARK AROUND 605 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR
ROOM ON THE LOWEST FLOOR!

&&

LAT...LON 4174 8754 4178 8799 4189 8798 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2238Z 265DEG 21KT 4183 8792

$$

IZZI
4 follow-up statements
507 
WWUS53 KLOT 232250
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
550 PM CDT WED JUN 23 2010

ILC043-232259-
/O.CAN.KLOT.TO.W.0021.000000T0000Z-100623T2345Z/
DUPAGE IL-
550 PM CDT WED JUN 23 2010

...THE TORNADO WARNING FOR EAST CENTRAL DUPAGE COUNTY IS CANCELLED...

THE TORANDIC CIRCULATION STORM WHICH PROMPTED THE WARNING HAS MOVED 
INTO COOK COUNTY. A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT 
FOR A LINE OF SEVERE THUNDERSTORMS MOVING INTO WESTERN DUPAGE COUNTY 
PRODUCING WIDESPREAD DAMAGING WINDS. 

LAT...LON 4174 8754 4178 8792 4189 8792 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2249Z 268DEG 28KT 4183 8777

$$

ILC031-232345-
/O.CON.KLOT.TO.W.0021.000000T0000Z-100623T2345Z/
COOK IL-
550 PM CDT WED JUN 23 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL COOK COUNTY UNTIL
645 PM CDT...

AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR RIVERSIDE...MOVING EAST AT 30 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  DOUGLAS PARK...ENGLEWOOD AND HUMBOLDT PARK AROUND 555 PM CDT.
  BRIDGEPORT...CHICAGO AND LINCOLN PARK AROUND 600 PM CDT.
  MEIGS FIELD...HYDE PARK AND NAVY PIER AROUND 605 PM CDT.

LAT...LON 4174 8754 4178 8792 4189 8792 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2249Z 268DEG 28KT 4183 8777

$$

IZZI
190 
WWUS53 KLOT 232309
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
609 PM CDT WED JUN 23 2010

ILC031-232345-
/O.CON.KLOT.TO.W.0021.000000T0000Z-100623T2345Z/
COOK IL-
609 PM CDT WED JUN 23 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL COOK COUNTY UNTIL
645 PM CDT...

AT 606 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THESE DANGEROUS STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM WESTCHESTER TO MEIGS FIELD...
MOVING EAST AT 20 MPH.

THESE DANGEROUS STORMS WILL BE NEAR...
  LA GRANGE AROUND 625 PM CDT.
  COUNTRYSIDE AND RIVERSIDE AROUND 630 PM CDT.
  BROOKFIELD AROUND 635 PM CDT.
  STICKNEY...LYONS...FOREST VIEW AND BRIDGEPORT AROUND 645 PM CDT.

LAT...LON 4174 8754 4178 8792 4189 8792 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2308Z 287DEG 17KT 4184 8789 4186 8759

$$

IZZI
124 
WWUS53 KLOT 232327
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
627 PM CDT WED JUN 23 2010

ILC031-232345-
/O.CON.KLOT.TO.W.0021.000000T0000Z-100623T2345Z/
COOK IL-
627 PM CDT WED JUN 23 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL COOK COUNTY UNTIL
645 PM CDT...

AT 625 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THESE DANGEROUS STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM FOREST VIEW TO 6 MILES NORTHEAST
OF HYDE PARK...MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  MIDWAY AIRPORT...BRIDGEPORT...ENGLEWOOD AND HYDE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4174 8754 4178 8792 4189 8792 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2327Z 287DEG 17KT 4181 8777 4183 8747

$$

IZZI
195 
WWUS53 KLOT 232339
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
639 PM CDT WED JUN 23 2010

ILC031-232349-
/O.EXP.KLOT.TO.W.0021.000000T0000Z-100623T2345Z/
COOK IL-
639 PM CDT WED JUN 23 2010

...THE TORNADO WARNING FOR CENTRAL COOK COUNTY WILL EXPIRE AT 645 PM
CDT/745 PM EDT/...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA...HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THESE THUNDERSTORMS.

REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN COOK 
COUNTY...INCLUDING THE CITY OF CHICAGO SOUTH OF 59TH STREET...UNTIL 
700 PM.  

LAT...LON 4174 8754 4178 8792 4189 8792 4195 8764
      4191 8762 4190 8761 4187 8761 4184 8760
      4180 8757 4178 8757 4176 8754
TIME...MOT...LOC 2339Z 287DEG 17KT 4179 8770 4181 8740

$$

IZZI

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 9:01 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more25 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTWinnebago59 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTWinnebago23 hr
Jun 22, 9:52 PM CDTRiver Flood AdvisoryLOTOgle23 hr
Jun 23, 3:52 AM CDTSmall Craft AdvisoryLOT27 hr
Jun 23, 5:29 AM CDTSevere Thunderstorm WarningLOTOgle, Winnebago61 min
Jun 23, 7:24 AM CDTSevere Thunderstorm WarningLOTDeKalb, LaSalle36 min
Jun 23, 8:42 AM CDTAreal Flood AdvisoryLOTBoone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more5 hr
Jun 23, 8:58 AM CDTSevere Thunderstorm WarningLOTCook, Will32 min
Jun 23, 9:11 AM CDTSpecial Marine WarningLOT41 min
Jun 23, 4:19 PM CDTSevere Thunderstorm WarningLOTLee, Ogle41 min
Jun 23, 4:40 PM CDTTornado WarningLOTDeKalb, Lee50 min
Jun 23, 4:56 PM CDTSpecial Marine WarningLOT3 hr
Jun 23, 5:01 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Lee, Ogle44 min
Jun 23, 5:01 PM CDTSevere Thunderstorm WarningLOTCook, DuPage, Kane59 min
Jun 23, 5:12 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Kendall, LaSalle33 min
Jun 23, 5:24 PM CDTFlash Flood WarningLOTLee, Ogle2 hr
Jun 23, 5:29 PM CDTSevere Thunderstorm WarningLOTCook, DuPage, Grundy, Kane, Kendall, LaSalle and 1 more61 min
Jun 23, 5:39 PM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle, Livingston66 min
Jun 23, 5:42 PM CDTFlash Flood WarningLOTCook, DeKalb, DuPage, Kane4 hr
Jun 23, 6:00 PM CDTSevere Thunderstorm WarningLOTDuPage30 min
Jun 23, 6:03 PM CDTTornado WarningLOTCook, DuPage, Will57 min
Jun 23, 6:23 PM CDTSevere Thunderstorm WarningLOTCook, Kankakee, Will67 min
Jun 23, 6:24 PM CDTTornado WarningLOTCook25 min
Jun 23, 6:28 PM CDTSevere Thunderstorm WarningLOTFord, Grundy, Iroquois, Kankakee, Livingston, Will62 min
Jun 23, 6:33 PM CDTTornado WarningLOTFord, Grundy, Iroquois, Kankakee, Livingston27 min
Jun 23, 6:48 PM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle, Livingston42 min

Nearby

Tornado Warnings in Illinois, 2010Every tornado warning in 2010Tornadoes in 2010

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.