Alert archive / Illinois / Tornado Warnings in 2011

Tornado Warning 13, NWS Chicago, IL

May 29, 20114 counties in Illinois

NWS Chicago, IL issued this tornado warning at May 29, 2011, 12:32 PM CDT for 4 counties in Illinois. It was in force for 43 min. 4 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: May 29, 2011, 12:32 PM CDT (17:32 UTC)
Expired: May 29, 2011, 1:15 PM CDT
In force: 43 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Grundy County, IL, Kankakee County, IL, Livingston County, IL, Will County, IL

The radar

The Chicago radar (KLOT), 58 km from the middle of the area, began a volume at 17:33 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
May 29, 1:03 PM CDT	FUNNEL CLOUD	Kankakee, IL	CROSSING I-57
May 29, 1:05 PM CDT	FUNNEL CLOUD	Herscher, IL	AT COUNTY LINE RD 8000 S AND RT 45.
May 29, 1:05 PM CDT	TSTM WND DMG	Kankakee, IL	TREES DOWN ON CAR ON COBB BLVD
May 29, 1:15 PM CDT	TSTM WND DMG	Kankakee, IL	LARGE TREE LIMBS DOWN ON WALL ST NEAR RIVERSIDE HOSPITAL

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
May 29, 8:53 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.5 hours before the alert went out and 121 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: 2176 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

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

608 
WFUS53 KLOT 291732
TORLOT
ILC063-091-105-197-291815-
/O.NEW.KLOT.TO.W.0013.110529T1732Z-110529T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1232 PM CDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN GRUNDY COUNTY...
  KANKAKEE COUNTY...
  NORTHEASTERN LIVINGSTON COUNTY...
  EXTREME SOUTHWESTERN WILL COUNTY...

* UNTIL 115 PM CDT

* AT 1228 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR DWIGHT...AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOURBONNAIS...KANKAKEE...BRADLEY...MANTENO...MOMENCE...GARDNER...
  BRACEVILLE...HERSCHER...AROMA PARK...ST. ANNE...GRANT PARK...
  HOPKINS PARK...SOUTH WILMINGTON...EAST BROOKLYN...GODLEY...
  REDDICK...ESSEX...BUCKINGHAM...UNION HILL AND BONFIELD.

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4101 8771 4107 8848 4124 8844 4128 8753
      4101 8753
TIME...MOT...LOC 1732Z 274DEG 49KT 4115 8836

$$

RATZER

3 follow-up statements

859 
WWUS53 KLOT 291747
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1247 PM CDT SUN MAY 29 2011

ILC063-105-291756-
/O.CAN.KLOT.TO.W.0013.000000T0000Z-110529T1815Z/
LIVINGSTON IL-GRUNDY IL-
1247 PM CDT SUN MAY 29 2011

...THE TORNADO WARNING FOR SOUTHEASTERN GRUNDY AND NORTHEASTERN
LIVINGSTON COUNTIES IS CANCELLED...

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

LAT...LON 4101 8753 4101 8771 4105 8825 4125 8825
      4128 8753
TIME...MOT...LOC 1746Z 275DEG 46KT 4113 8815

$$

ILC091-197-291815-
/O.CON.KLOT.TO.W.0013.000000T0000Z-110529T1815Z/
KANKAKEE IL-WILL IL-
1247 PM CDT SUN MAY 29 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EXTREME SOUTHWESTERN WILL
AND KANKAKEE COUNTIES UNTIL 115 PM CDT...

AT 1242 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTHEAST OF GARDNER...OR 11 MILES EAST OF
DWIGHT...MOVING EAST AT 55 MPH. RADAR INDICATION OF ROTATION HAS 
DIMINISHED SLIGHTLY...BUT THE ENVIRONMENT IS CONDUCIVE TO SQUALL 
LINE TORNADO DEVELOPMENT.

LOCATIONS IMPACTED INCLUDE...
  BOURBONNAIS...KANKAKEE...BRADLEY...MANTENO...MOMENCE...HERSCHER...
  AROMA PARK...ST. ANNE...GRANT PARK...HOPKINS PARK...BONFIELD...
  IRWIN AND SUN RIVER TERRACE.

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.

INTENSE SQUALL LINES CAN OCCASIONALLY PRODUCE BRIEF TORNADOES IN
ADDITION TO WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT
IMMEDIATELY LIKELY... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 4101 8753 4101 8771 4105 8825 4125 8825
      4128 8753
TIME...MOT...LOC 1746Z 275DEG 46KT 4113 8815

$$

RATZER

098 
WWUS53 KLOT 291800
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
100 PM CDT SUN MAY 29 2011

ILC197-291809-
/O.CAN.KLOT.TO.W.0013.000000T0000Z-110529T1815Z/
WILL IL-
100 PM CDT SUN MAY 29 2011

...THE TORNADO WARNING FOR EXTREME SOUTHWESTERN WILL COUNTY IS
CANCELLED...

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

LAT...LON 4101 8753 4101 8771 4104 8816 4126 8796
      4128 8753
TIME...MOT...LOC 1759Z 275DEG 46KT 4111 8793

$$

ILC091-291815-
/O.CON.KLOT.TO.W.0013.000000T0000Z-110529T1815Z/
KANKAKEE IL-
100 PM CDT SUN MAY 29 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR KANKAKEE COUNTY UNTIL 115
PM CDT...

AT 1255 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THIS DANGEROUS STORM WAS LOCATED 7
MILES SOUTHWEST OF BOURBONNAIS...MOVING EAST AT 55 MPH. RADAR 
INDICATION OF ROTATION HAS DIMINISHED SLIGHTLY...BUT THE ENVIRONMENT 
IS CONDUCIVE TO SQUALL LINE TORNADO DEVELOPMENT.


THIS DANGEROUS STORM WILL BE NEAR...
  KANKAKEE...AROMA PARK AND BRADLEY AROUND 105 PM CDT.
  ST. ANNE AROUND 110 PM CDT.
  HOPKINS PARK AND MOMENCE AROUND 115 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADO INCLUDE SUN RIVER TERRACE.

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.

INTENSE SQUALL LINES CAN OCCASIONALLY PRODUCE BRIEF TORNADOES IN
ADDITION TO WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT
IMMEDIATELY LIKELY... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 4101 8753 4101 8771 4104 8816 4126 8796
      4128 8753
TIME...MOT...LOC 1759Z 275DEG 46KT 4111 8793

$$

RATZER

354 
WWUS53 KLOT 291818
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
118 PM CDT SUN MAY 29 2011

ILC091-291828-
/O.EXP.KLOT.TO.W.0013.000000T0000Z-110529T1815Z/
KANKAKEE IL-
118 PM CDT SUN MAY 29 2011

...THE TORNADO WARNING HAS BEEN REISSUED FOR EASTERN KANKAKEE 
COUNTY...

PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER
INFORMATION.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 4 PM CDT.

LAT...LON 4101 8753 4101 8771 4104 8816 4126 8796
      4128 8753
TIME...MOT...LOC 1800Z 275DEG 46KT 4110 8791

$$

RATZER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:42 PM CDT	Flash Flood Warning	LOT	Will	4 hr
May 28, 8:48 PM CDT	Marine Dense Fog Advisory	LOT		61 hr
May 29, 2:10 AM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more	7 hr
May 29, 10:34 AM CDT	Areal Flood Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 7 more	6 hr
May 29, 11:13 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle, Lee, Livingston	62 min
May 29, 11:19 AM CDT	Special Marine Warning	LOT		3 hr
May 29, 11:22 AM CDT	Special Marine Warning	LOT		3 hr
May 29, 11:23 AM CDT	Severe Thunderstorm Warning	LOT	Cook, DeKalb, DuPage, Kane, Kendall, Lake and 1 more	67 min
May 29, 11:31 AM CDT	Flash Flood Warning	LOT	DeKalb, LaSalle, Lee	6 hr
May 29, 11:51 AM CDT	Areal Flood Advisory	LOT	Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more	4 hr
May 29, 11:58 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, DuPage, Ford, Grundy, Kane, Kankakee and 6 more	77 min
May 29, 12:38 PM CDT	Flash Flood Warning	LOT	Boone, Cook, DeKalb, DuPage, Kane, Lake and 4 more	5 hr
May 29, 12:43 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more	77 min
May 29, 1:16 PM CDT	Tornado Warning	LOT	Kankakee	44 min
May 29, 2:41 PM CDT	River Flood Advisory	LOT	DeKalb	34 hr
May 29, 3:44 PM CDT	River Flood Warning	LOT	Lake	42 hr
May 29, 3:44 PM CDT	River Flood Warning	LOT	Kane, Kendall	42 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Kankakee	39 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Grundy, Will	39 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Cook	4 hr
May 29, 4:01 PM CDT	River Flood Advisory	LOT	Iroquois	55 hr
May 29, 4:21 PM CDT	River Flood Warning	LOT	Cook	29 hr
May 29, 5:23 PM CDT	Areal Flood Warning	LOT	Cook, DeKalb, DuPage, Kane, Lake, Lee and 1 more	12 hr
May 29, 5:52 PM CDT	River Flood Advisory	LOT	Will	13 hr

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.