Alert archive / Illinois / Tornado Warnings in 2011

Tornado Warning 27, NWS Lincoln, IL

May 7, 2011Champaign County, Illinois

NWS Lincoln, IL issued this tornado warning at May 7, 2011, 5:12 PM CDT for Champaign County, Illinois. It was in force for 31 min. 2 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 7, 2011, 5:12 PM CDT (22:12 UTC)
Expired: May 7, 2011, 5:43 PM CDT
In force: 31 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon

County Champaign County, IL

The radar

The Lincoln radar (KILX), 108 km from the middle of the area, began a volume at 22:13 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 7, 5:43 PM CDT	HAIL 1	3 S St. Joseph, IL
May 7, 5:47 PM CDT	HAIL 0.75	Homer, IL	DIME SIZED HAIL

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 7, 2:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 45 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: 1168 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

635 
WFUS53 KILX 072212
TORILX
ILC019-072300-
/O.NEW.KILX.TO.W.0027.110507T2212Z-110507T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
512 PM CDT SAT MAY 7 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CHAMPAIGN COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 600 PM CDT.

* AT 508 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR THOMASBORO...OR 7 MILES SOUTHWEST OF
  RANTOUL...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ST. JOSEPH...OGDEN AND HOMER.

THIS INCLUDES INTERSTATE 57 BETWEEN MILE MARKERS 238 AND 246.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 182 AND 197.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT 
WAS IN EFFECT FOR THE SAME AREA. THE SEVERE THUNDERSTORM WARNING 
REMAINS IN EFFECT FOR PORTIONS OF EASTERN CHAMPAIGN AND WESTERN 
VERMILION COUNTY.

&&

LAT...LON 4017 8795 3998 8795 4016 8829 4026 8820
TIME...MOT...LOC 2211Z 304DEG 19KT 4021 8819

$$

CHURCHILL

2 follow-up statements

901 
WWUS53 KILX 072221
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
521 PM CDT SAT MAY 7 2011

ILC019-072300-
/O.CON.KILX.TO.W.0027.000000T0000Z-110507T2300Z/
CHAMPAIGN IL-
521 PM CDT SAT MAY 7 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL CHAMPAIGN
COUNTY UNTIL 600 PM CDT...

AT 517 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED JUST SOUTHEAST OF THOMASBORO...OR 8 MILES SOUTH OF 
RANTOUL...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  ST. JOSEPH...OGDEN AND HOMER.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 188 AND 196.

LAT...LON 4017 8795 4001 8795 4017 8821 4024 8814
TIME...MOT...LOC 2221Z 305DEG 23KT 4017 8812

$$

CHURCHILL

212 
WWUS53 KILX 072243
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
543 PM CDT SAT MAY 7 2011

ILC019-072252-
/O.CAN.KILX.TO.W.0027.000000T0000Z-110507T2300Z/
CHAMPAIGN IL-
543 PM CDT SAT MAY 7 2011

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

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
SOUTHEASTERN CHAMPAIGN AND SOUTHWESTERN VERMILION COUNTIES UNTIL
630 PM. 

LAT...LON 4017 8795 4001 8795 4017 8821 4024 8814
TIME...MOT...LOC 2242Z 305DEG 23KT 4009 8798

$$

CHURCHILL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 4:06 PM CDT	Tornado Warning	ILX	Champaign, Vermilion	39 min
May 7, 4:44 PM CDT	Tornado Warning	ILX	Vermilion	46 min
May 7, 4:59 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	46 min
May 7, 5:17 PM CDT	Areal Flood Warning	ILX	Lawrence	4 days
May 7, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	50 min
May 7, 5:39 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	51 min
May 7, 6:03 PM CDT	Tornado Warning	ILX	Edgar, Vermilion	42 min
May 7, 6:24 PM CDT	Tornado Warning	ILX	Edgar	51 min
May 7, 6:57 PM CDT	Tornado Warning	ILX	Edgar	25 min

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.