Alert archive / Illinois / Tornado Warnings in 2009

Tornado Warning 28, NWS St. Louis, MO

May 25, 2009Macoupin County, Illinois

NWS St. Louis, MO issued this tornado warning at May 25, 2009, 1:38 PM CDT for Macoupin County, Illinois. It was in force for 37 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: May 25, 2009, 1:38 PM CDT (18:38 UTC)
Expired: May 25, 2009, 2:15 PM CDT
In force: 37 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Macoupin County, IL

The radar

The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 18:38 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
May 25, 1:50 PM CDT	FUNNEL CLOUD	5 Sw Carlinville, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.6 hours before the alert went out and 164 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 251838
TORLSX
ILC117-251915-
/O.NEW.KLSX.TO.W.0028.090525T1838Z-090525T1915Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...

* UNTIL 215 PM CDT

* AT 135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR BUNKER HILL...OR 8 MILES SOUTHWEST OF
  GILLESPIE...AND MOVING NORTHWEST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHIPMAN...ROYAL LAKES AND PLAINVIEW.

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 3900 8981 3900 9000 3919 9015 3926 8988
TIME...MOT...LOC 1838Z 157DEG 6KT 3907 8994

$$

CARNEY

1 follow-up statement

000 
WWUS53 KLSX 251857
SVSLSX

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

ILC117-251915-
/O.CON.KLSX.TO.W.0028.000000T0000Z-090525T1915Z/
MACOUPIN IL-
157 PM CDT MON MAY 25 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR CENTRAL
MACOUPIN COUNTY...

AT 157 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD.
THIS TORNADO WAS LOCATED NEAR ROYAL LAKES...OR 7 MILES WEST OF
GILLESPIE...MOVING NORTHWEST AT 5 MPH.

LOCATIONS IMPACTED INCLUDE...
  SHIPMAN...ROYAL LAKES AND PLAINVIEW.

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 3906 8983 3901 8997 3920 9013 3926 8988
TIME...MOT...LOC 1857Z 157DEG 6KT 3912 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, 2:16 PM CDT	Tornado Warning	LSX	Madison	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.