Alert archive / Illinois / Tornado Warnings in 2011

Tornado Warning 26, NWS Lincoln, IL

May 7, 2011Vermilion County, Illinois

NWS Lincoln, IL issued this tornado warning at May 7, 2011, 4:44 PM CDT for Vermilion County, Illinois. It was in force for 46 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
May 7, 2011, 4:44 PM CDT (21:44 UTC)
Expired
May 7, 2011, 5:30 PM CDT
In force
46 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon

County Vermilion County, IL

The radar

The Lincoln radar (KILX), 137 km from the middle of the area, began a volume at 21:45 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
May 7, 5:13 PM CDTHAIL 0.883 Nw Danville, IL

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
May 7, 2:59 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 74 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 2011-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2011-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.1939587897Sfc1 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
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.

008 
WFUS53 KILX 072144
TORILX
ILC183-072230-
/O.NEW.KILX.TO.W.0026.110507T2144Z-110507T2230Z/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 530 PM CDT.

* AT 440 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS 
  DANGEROUS   STORM WAS LOCATED 6 MILES WEST OF POTOMAC...OR JUST 
  NORTHWEST OF ARMSTRONG...AND MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  POTOMAC...MIDDLE FORK WILDLIFE AREA AND COLLISON.

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 4023 8756 4011 8772 4030 8792 4036 8791
TIME...MOT...LOC 2143Z 309DEG 22KT 4032 8789

$$

CHURCHILL
2 follow-up statements
295 
WWUS53 KILX 072203
SVSILX

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

ILC183-072230-
/O.CON.KILX.TO.W.0026.000000T0000Z-110507T2230Z/
VERMILION IL-
503 PM CDT SAT MAY 7 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL VERMILION COUNTY
UNTIL 530 PM CDT...

AT 459 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTH OF POTOMAC...OR 10 MILES NORTHWEST OF
DANVILLE...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL VERMILION COUNTY.

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 4026 8787 4032 8783 4023 8756 4011 8772
TIME...MOT...LOC 2203Z 309DEG 22KT 4021 8775

$$

CHURCHILL
117 
WWUS53 KILX 072229
SVSILX

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

ILC183-072239-
/O.EXP.KILX.TO.W.0026.000000T0000Z-110507T2230Z/
VERMILION IL-
529 PM CDT SAT MAY 7 2011

...THE TORNADO WARNING FOR CENTRAL VERMILION COUNTY WILL EXPIRE AT
530 PM CDT...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 4026 8787 4032 8783 4023 8756 4011 8772
TIME...MOT...LOC 2229Z 309DEG 22KT 4011 8759

$$

CHURCHILL

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 4:06 PM CDTTornado WarningILXChampaign, Vermilion39 min
May 7, 4:59 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion46 min
May 7, 5:12 PM CDTTornado WarningILXChampaign31 min
May 7, 5:17 PM CDTAreal Flood WarningILXLawrence4 days
May 7, 5:25 PM CDTSevere Thunderstorm WarningILXVermilion50 min
May 7, 5:39 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion51 min
May 7, 6:03 PM CDTTornado WarningILXEdgar, Vermilion42 min
May 7, 6:24 PM CDTTornado WarningILXEdgar51 min
May 7, 6:57 PM CDTTornado WarningILXEdgar25 min

Nearby

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