Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 87, NWS Paducah, KY

September 25, 2012Jefferson County, Illinois

NWS Paducah, KY issued this tornado warning at Sep 25, 2012, 6:08 PM CDT for Jefferson County, Illinois. It was in force for 37 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 25, 2012, 6:08 PM CDT (23:08 UTC)
Expired: Sep 25, 2012, 6:45 PM CDT
In force: 37 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon

County Jefferson County, IL

The radar

The Evansville,IN radar (KVWX), 114 km from the middle of the area, began a volume at 23:08 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
Sep 25, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.1 hours before the alert went out and 205 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: 221 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

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

127 
WFUS53 KPAH 252308
TORPAH
ILC081-252345-
/O.NEW.KPAH.TO.W.0087.120925T2308Z-120925T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
608 PM CDT TUE SEP 25 2012

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN JEFFERSON COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 645 PM CDT.

* AT 559 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 6 MILES WEST
  OF IRVINGTON...OR 7 MILES NORTHEAST OF NASHVILLE...MOVING EAST AT
  20 MPH.

  A WALL CLOUD WAS REPORTED NEAR OKAWVILLE AT 542 PM CDT...AND       
  DAMAGE WAS REPORTED WITH THIS STORM NEAR OKAWVILLE AT 548 PM CDT. 

* LOCATIONS IN THE WARNED AREA INCLUDE...
  MOUNT VERNON...WOODLAWN...WALTONVILLE AND DIX.

THIS INCLUDES INTERSTATE 57 BETWEEN EXITS 103 AND 96.

LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE BEHIND THE INITIAL STORM 
DUE TO ADDITIONAL STORMS IN THE AREA.

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 3819 8893 3822 8915 3847 8915 3847 8914
      3848 8883
TIME...MOT...LOC 2304Z 281DEG 18KT 3841 8925

$$

RST

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 6:31 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	44 min
Sep 25, 6:43 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson	23 min

Nearby

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