Alert archive / Illinois / Tornado Warnings in 2009

Tornado Warning 29, NWS St. Louis, MO

May 25, 2009Madison County, Illinois

NWS St. Louis, MO issued this tornado warning at May 25, 2009, 2:16 PM CDT for Madison County, Illinois. It was in force for 29 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: May 25, 2009, 2:16 PM CDT (19:16 UTC)
Expired: May 25, 2009, 2:45 PM CDT
In force: 29 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Madison County, IL

The radar

The St Louis radar (KLSX), 72 km from the middle of the area, began a volume at 19:15 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, 7.3 hours before the alert went out and 179 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: 1131 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 89 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 KLSX 251916
TORLSX
ILC119-251945-
/O.NEW.KLSX.TO.W.0029.090525T1916Z-090525T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
216 PM CDT MON MAY 25 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MADISON COUNTY IN SOUTHWEST ILLINOIS...

* UNTIL 245 PM CDT

* AT 217 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CARPENTER...OR NEAR EDWARDSVILLE...AND
  MOVING NORTH AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BETHALTO...CARPENTER...WORDEN...PRAIRIETOWN...DORSEY AND HAMEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES
OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF
NO SHELTER IS AVAILABLE... LIE FLAT IN THE NEAREST DITCH OR OTHER LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3877 8981 3876 9004 3900 9008 3900 8980
      3899 8980
TIME...MOT...LOC 1917Z 177DEG 12KT 3886 8993

$$

CARNEY

1 follow-up statement

000 
WWUS53 KLSX 251943
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
243 PM CDT MON MAY 25 2009

ILC119-251953-
/O.EXP.KLSX.TO.W.0029.000000T0000Z-090525T1945Z/
MADISON IL-
243 PM CDT MON MAY 25 2009

...THE TORNADO WARNING FOR CENTRAL MADISON COUNTY WILL EXPIRE AT 245
PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER 
APPEARED TO BE SEVERE...HOWEVER HEAVY RAIN IS STILL LIKELY WITH THIS 
THUNDERSTORM.

LAT...LON 3877 8981 3876 9004 3900 9008 3900 8980
      3899 8980
TIME...MOT...LOC 1943Z 177DEG 12KT 3895 8994

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 11:00 AM CDT	Areal Flood Advisory	LSX	Madison	6 hr
May 25, 11:55 AM CDT	Flash Flood Warning	LSX	Madison	5 hr
May 25, 1:38 PM CDT	Tornado Warning	LSX	Macoupin	37 min
May 25, 3:06 PM CDT	Flash Flood Warning	LSX	Macoupin	6 hr
May 25, 3:34 PM CDT	Areal Flood Advisory	LSX	Bond, Fayette, Montgomery	6 hr
May 25, 5:00 PM CDT	Areal Flood Warning	LSX	Madison	6 hr
May 25, 5:09 PM CDT	Areal Flood Warning	LSX	Madison	6 hr

Nearby

Tornado Warnings in Illinois, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.