Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 14, NWS St. Louis, MO

March 23, 2012Marion County, Illinois

NWS St. Louis, MO issued this tornado warning at Mar 23, 2012, 2:15 PM CDT for Marion County, Illinois. It was in force for 30 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: Mar 23, 2012, 2:15 PM CDT (19:15 UTC)
Expired: Mar 23, 2012, 2:45 PM CDT
In force: 30 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Marion County, IL

The radar

The Evansville,IN radar (KVWX), 102 km from the middle of the area, began a volume at 19:16 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

Time	Report	Where	Remark
Mar 23, 2:15 PM CDT	HAIL 0.88	Stephen Forbes State Pa, IL	REPORTED IN THE CAMP GROUND AT THE STATE PARK

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.

Issued	Product	Office	Lasted
Mar 23, 11:44 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.3 hours before the alert went out and 155 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 808 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 57 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.

736 
WFUS53 KLSX 231915
TORLSX
ILC121-231945-
/O.NEW.KLSX.TO.W.0014.120323T1915Z-120323T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
215 PM CDT FRI MAR 23 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 245 PM CDT

* AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR OMEGA...OR 11 MILES EAST OF SALEM...AND
  MOVING NORTHEAST AT 30 MPH.

  THIS STORM HAS A HISTORY OF PRODUCING TORNADOES...INCLUDING MOST 
  RECENTLY JUST SOUTH OF IUKA.

* LOCATIONS IMPACTED INCLUDE...
  STEPHEN FORBES STATE PARK.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3872 8869 3872 8870 3872 8880 3883 8873
      3883 8869
TIME...MOT...LOC 1915Z 203DEG 26KT 3870 8874

$$

TES

1 follow-up statement

127 
WWUS53 KLSX 231942
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
242 PM CDT FRI MAR 23 2012

ILC121-231948-
/O.EXP.KLSX.TO.W.0014.000000T0000Z-120323T1945Z/
MARION IL-
242 PM CDT FRI MAR 23 2012

...THE TORNADO WARNING FOR NORTHEASTERN MARION COUNTY WILL EXPIRE AT
245 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 7PM CDT.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3872 8869 3872 8870 3872 8880 3883 8873
      3883 8869
TIME...MOT...LOC 1938Z 203DEG 26KT 3885 8866

$$

TES

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 12:59 PM CDT	Tornado Warning	LSX	Washington	46 min
Mar 23, 1:47 PM CDT	Tornado Warning	LSX	Marion	43 min
Mar 23, 4:26 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene	14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.