Alert archive / Illinois / Tornado Warnings in 2013

Tornado Warning 34, NWS St. Louis, MO

May 31, 2013Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this tornado warning at May 31, 2013, 8:56 PM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 34 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 31, 2013, 8:56 PM CDT (01:56 UTC)
Expired: May 31, 2013, 9:30 PM CDT
In force: 34 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Macoupin County, IL, Montgomery County, IL

The radar

The Lincoln radar (KILX), 87 km from the middle of the area, began a volume at 01:59 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 31, 9:04 PM CDT	TSTM WND DMG	5 S Farmersville, IL	MONTGOMERY COUNTY SHERIFF REPORTED THREE TRACTOR TRAILERS BLOWN OVER ON INTERSTATE 55 - THERE IS STRUCTURAL DAMAGE OVER THIS AREA.

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
May 31, 5:45 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.9 hours before the alert went out and 125 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: 2269 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 3.6
Supercell composite: 15.2

Open this sounding in Storm Lab

The text

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

732 
WFUS53 KLSX 010156
TORLSX
ILC117-135-010230-
/O.NEW.KLSX.TO.W.0034.130601T0156Z-130601T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
856 PM CDT FRI MAY 31 2013

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
  NORTHWESTERN MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 930 PM CDT

* AT 851 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES NORTHEAST OF CARLINVILLE...AND MOVING
  NORTHEAST AT 65 MPH.

  HAZARD...DEVELOPING TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
           SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
           OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
           EXTENSIVE TREE DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  FARMERSVILLE...WHITE OAK AND WAGGONER.

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 3927 8978 3941 8990 3942 8990 3953 8971
      3953 8954 3952 8953 3939 8952
TIME...MOT...LOC 0156Z 236DEG 58KT 3939 8975

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

GLASS

2 follow-up statements

320 
WWUS53 KLSX 010220
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
920 PM CDT FRI MAY 31 2013

ILC117-135-010230-
/O.CON.KLSX.TO.W.0034.000000T0000Z-130601T0230Z/
MACOUPIN IL-MONTGOMERY IL-
920 PM CDT FRI MAY 31 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN MONTGOMERY
AND NORTHEASTERN MACOUPIN COUNTIES UNTIL 930 PM CDT...

AT 916 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR KINCAID...AND MOVING NORTHEAST AT 65 MPH.

HAZARD...DEVELOPING TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
         SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
         OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
         EXTENSIVE TREE DAMAGE IS LIKELY.

LOCATIONS IMPACTED INCLUDE...

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 3934 8963 3948 8978 3942 8990 3953 8971
      3953 8954 3952 8953 3939 8952
TIME...MOT...LOC 0220Z 236DEG 58KT 3961 8933

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

GLASS

028 
WWUS53 KLSX 010231
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
931 PM CDT FRI MAY 31 2013

ILC117-135-010242-
/O.EXP.KLSX.TO.W.0034.000000T0000Z-130601T0230Z/
MACOUPIN IL-MONTGOMERY IL-
931 PM CDT FRI MAY 31 2013

...THE TORNADO WARNING FOR NORTHWESTERN MONTGOMERY AND NORTHEASTERN
MACOUPIN COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3934 8963 3948 8978 3942 8990 3953 8971
      3953 8954 3952 8953 3939 8952
TIME...MOT...LOC 0220Z 236DEG 58KT 3961 8933

$$

GLASS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:30 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	45 min
May 31, 7:59 PM CDT	Tornado Warning	LSX	Monroe	31 min
May 31, 8:08 PM CDT	Tornado Warning Tornado observed	LSX	Madison	37 min
May 31, 8:12 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin, Madison, Monroe, Saint Clair	48 min
May 31, 8:26 PM CDT	Tornado Warning	LSX	Monroe, Saint Clair	34 min
May 31, 8:31 PM CDT	Tornado Warning	LSX	Greene, Jersey, Macoupin	29 min
May 31, 8:33 PM CDT	Tornado Warning	LSX	Bond, Madison	27 min
May 31, 8:50 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Macoupin, Madison, Montgomery and 2 more	55 min
May 31, 8:50 PM CDT	Tornado Warning	LSX	Macoupin, Montgomery	25 min
May 31, 8:52 PM CDT	Tornado Warning	LSX	Bond, Madison, Montgomery	23 min
May 31, 9:07 PM CDT	Tornado Warning	LSX	Macoupin	23 min
May 31, 9:13 PM CDT	Tornado Warning	LSX	Bond, Fayette, Marion, Montgomery	32 min
May 31, 9:21 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair	54 min
May 31, 9:43 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	47 min
May 31, 10:28 PM CDT	Flash Flood Warning	LSX	Calhoun, Greene, Jersey, Macoupin	6 hr
May 31, 11:02 PM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Madison, Monroe, Randolph and 1 more	6 hr
Jun 1, 12:09 AM CDT	Flash Flood Warning	LSX	Marion, Washington	6 hr
Jun 1, 5:03 AM CDT	Areal Flood Warning	LSX	Bond, Clinton, Fayette, Madison, Monroe, Randolph and 2 more	6 hr
Jun 1, 5:57 AM CDT	Areal Flood Warning	LSX	Marion, Washington	6 hr
Jun 1, 11:51 AM CDT	Areal Flood Warning	LSX	Marion, Washington	6 hr
Jun 1, 5:56 PM CDT	Areal Flood Warning	LSX	Marion	18 hr

Nearby

Tornado Warnings in Illinois, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.