Alert archive / Illinois / Tornado Warnings in 2008

Tornado Warning 11, NWS Lincoln, IL

April 25, 2008DeWitt County, Logan County, Illinois

NWS Lincoln, IL issued this tornado warning at Apr 25, 2008, 6:51 PM CDT for DeWitt County, Logan County, Illinois. It was in force for 15 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: Apr 25, 2008, 6:51 PM CDT (23:51 UTC)
Expired: Apr 25, 2008, 7:06 PM CDT
In force: 15 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon

Counties DeWitt County, IL, Logan County, IL

The radar

The Lincoln radar (KILX), 11 km from the middle of the area, began a volume at 23:52 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 25, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 25, 3:41 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.9 hours before the alert went out and 54 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: 288 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 142 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.

000 
WFUS53 KILX 252350
TORILX
ILC039-107-260015-
/O.NEW.KILX.TO.W.0011.080425T2351Z-080426T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
651 PM CDT FRI APR 25 2008

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN DE WITT COUNTY IN CENTRAL ILLINOIS...
  LOGAN COUNTY IN CENTRAL ILLINOIS...

* UNTIL 715 PM CDT.

* AT 651 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 2 MILES SOUTH OF
  LINCOLN...MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BEASON...
  ATLANTA...
  WAYNESVILLE...
  WAPELLA...

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 121 AND 141.

THIS INCLUDES INTERSTATE 155 BETWEEN MILE MARKERS 0 AND 1.

WHEN A TORNADO WARNING IS ISSUED...IT MEANS THAT STRONG ROTATION HAS
BEEN DETECTED IN THE STORM...AND ATMOSPHERIC CONDITIONS SUPPORT THAT
ROTATION REACHING THE GROUND. A TORNADO MAY ALREADY BE ON THE
GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF
THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE
BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER
UNDER A HIGHWAY OVERPASS.

REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL EMERGENCY
MANAGER...OR THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE
NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FRIDAY EVENING FOR
NORTHWESTERN ILLINOIS.

LAT...LON 4029 8926 4028 8881 4001 8935 4016 8949
TIME...MOT...LOC 2351Z 223DEG 47KT 4016 8931

$$

BARKER

1 follow-up statement

000 
WWUS53 KILX 260006
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
704 PM CDT FRI APR 25 2008

ILC039-107-260014-
/O.CAN.KILX.TO.W.0011.000000T0000Z-080426T0015Z/
DE WITT-LOGAN-
704 PM CDT FRI APR 25 2008

...THE TORNADO WARNING FOR LOGAN AND NORTHWESTERN DE WITT COUNTIES IS
CANCELLED...

AT 701 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THAT
THE THUNDERSTORM THAT HAD PROMPTED THE WARNING HAD MOVED OUT OF THE
AREA...THUS THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT FOR LOGAN COUNTY UNTIL 8 PM. 
REMAIN ALERT FOR THE POSSIBILITY OF ADDITIONAL SEVERE THUNDERSTORMS 
AND WARNINGS.

LAT...LON 4029 8926 4028 8881 4001 8935 4016 8949
TIME...MOT...LOC 0004Z 223DEG 47KT 4028 8915

$$

BARKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 4:37 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Morgan, Schuyler, Scott	38 min
Apr 25, 5:14 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Morgan, Scott	46 min
Apr 25, 5:30 PM CDT	Severe Thunderstorm Warning	ILX	Mason	32 min
Apr 25, 5:59 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	46 min
Apr 25, 6:37 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan	38 min
Apr 25, 6:45 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, Macon, Sangamon	30 min

Nearby

Tornado Warnings in Illinois, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.