Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 19, NWS Lincoln, IL

September 1, 2012Logan County, Tazewell County, Illinois

NWS Lincoln, IL issued this tornado warning at Sep 1, 2012, 12:07 PM CDT for Logan County, Tazewell County, Illinois. It was in force for 22 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
Sep 1, 2012, 12:07 PM CDT (17:07 UTC)
Expired
Sep 1, 2012, 12:29 PM CDT
In force
22 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon

Counties Logan County, IL, Tazewell County, IL

The radar

The Lincoln radar (KILX), 25 km from the middle of the area, began a volume at 17:09 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.1 hours before the alert went out and 65 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 2012-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 443 joules per kilogram.LCLEL10008507005003002001001 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 2012-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939Sfc1 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
443 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
457 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
36 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.

930 
WFUS53 KILX 011707
TORILX
ILC107-179-011745-
/O.NEW.KILX.TO.W.0019.120901T1707Z-120901T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1207 PM CDT SAT SEP 1 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL LOGAN COUNTY IN CENTRAL ILLINOIS...
  SOUTHEASTERN TAZEWELL COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1245 PM CDT.

* AT 1204 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR ATLANTA...OR 6 MILES NORTHEAST OF LINCOLN...
  AND MOVING NORTH AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ARMINGTON...MINIER...HOPEDALE...MACKINAW...TREMONT AND DILLON.

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 4044 8926 4028 8926 4028 8925 4021 8924
      4019 8936 4053 8959 4060 8928
TIME...MOT...LOC 1707Z 168DEG 17KT 4023 8930

$$

BARNES
1 follow-up statement
704 
WWUS53 KILX 011729
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1229 PM CDT SAT SEP 1 2012

ILC107-179-011739-
/O.CAN.KILX.TO.W.0019.000000T0000Z-120901T1745Z/
LOGAN IL-TAZEWELL IL-
1229 PM CDT SAT SEP 1 2012

...THE TORNADO WARNING FOR SOUTHEASTERN TAZEWELL AND NORTH CENTRAL
LOGAN COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

LAT...LON 4044 8926 4028 8926 4028 8925 4021 8924
      4019 8936 4053 8959 4060 8928
TIME...MOT...LOC 1729Z 168DEG 17KT 4033 8933

$$

BARNES

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 11:48 AM CDTTornado WarningILXMarshall, Woodford42 min
Sep 1, 12:01 PM CDTTornado WarningILXMarshall, Peoria, Woodford44 min
Sep 1, 12:26 PM CDTTornado WarningILXMarshall49 min
Sep 1, 12:43 PM CDTTornado WarningILXMarshall, Stark47 min
Sep 1, 2:41 PM CDTTornado WarningILXChristian, Logan, Sangamon49 min
Sep 1, 2:50 PM CDTTornado WarningILXMason, Menard, Sangamon40 min
Sep 1, 4:24 PM CDTFlash Flood WarningILXEffingham6 hr

Nearby

Tornado Warnings in Illinois, 2012Every tornado warning in 2012Tornadoes in 2012

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.