Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 77, NWS Paducah, KY

September 1, 2012Jackson County, Union County, Williamson County, Illinois

NWS Paducah, KY issued this tornado warning at Sep 1, 2012, 5:32 PM CDT for Jackson County, Union County, Williamson County, Illinois. It was in force for 28 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, 5:32 PM CDT (22:32 UTC)
Expired
Sep 1, 2012, 6:00 PM CDT
In force
28 min
Issued by
NWS Paducah, KY
Area
Storm-based polygon

Counties Jackson County, IL, Union County, IL, Williamson County, IL

The radar

The Paducah radar (KPAH), 75 km from the middle of the area, began a volume at 22:33 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Sep 1, 1:19 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 280 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.

768 
WFUS53 KPAH 012232
TORPAH
ILC077-181-199-012300-
/O.NEW.KPAH.TO.W.0077.120901T2232Z-120901T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
532 PM CDT SAT SEP 1 2012

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN JACKSON COUNTY IN SOUTHERN ILLINOIS...
  NORTHEASTERN UNION COUNTY IN SOUTHERN ILLINOIS...
  WESTERN WILLIAMSON COUNTY IN SOUTHERN ILLINOIS...

* UNTIL 600 PM CDT.

* AT 530 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR CEDAR
  LAKE AREA...OR 8 MILES SOUTH OF CARBONDALE...MOVING NORTHEAST AT 30
  MPH.

* LOCATIONS IN THE WARNED AREA INCLUDE...
  CARTERVILLE...HERRIN...CAMBRIA...CRAINVILLE...ENERGY AND COLP.

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 3783 8906 3767 8891 3750 8920 3760 8928
      3760 8937
TIME...MOT...LOC 2232Z 236DEG 28KT 3762 8922

$$

NOLES

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 5:29 PM CDTTornado WarningPAHUnion31 min
Sep 1, 5:35 PM CDTSevere Thunderstorm WarningPAHFranklin25 min
Sep 1, 5:50 PM CDTSevere Thunderstorm WarningPAHAlexander, Pulaski, Union25 min
Sep 1, 6:26 PM CDTFlash Flood WarningPAHFranklin, Jackson, Union, Williamson3 hr
Sep 1, 6:29 PM CDTSevere Thunderstorm WarningPAHAlexander, Pulaski31 min
Sep 1, 6:42 PM CDTTornado WarningPAHAlexander, Pulaski33 min

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.