Alert archive / Missouri / Tornado Warnings in 2013

Tornado Warning 10, NWS St. Louis, MO

April 10, 2013Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 10, 2013, 8:04 PM CDT for Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 26 min. 7 reports 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: Apr 10, 2013, 8:04 PM CDT (01:04 UTC)
Expired: Apr 10, 2013, 8:30 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Madison County, IL, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 52 km from the middle of the area, began a volume at 01:04 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
Apr 10, 8:04 PM CDT	TSTM WND DMG	Florissant, MO	MINOR ROOF DAMAGE TO A STRIP MALL ON LINDBERGH BLVD.
Apr 10, 8:05 PM CDT	TORNADO	Hazelwood, MO	RELAYED FROM TROOP C.
Apr 10, 8:12 PM CDT	TSTM WND DMG	Wood River, IL	NUMEROUS LARGE TREE LIMBS DOWN. POWER POLE SNAPPED.
Apr 10, 8:17 PM CDT	TSTM WND DMG	Florissant, MO	POWER LINES DOWN AND HIGHWAYS CLOSED AT I-170 AND I-270 INTERSECTION.
Apr 10, 8:23 PM CDT	TSTM WND GST 50	Bethalto, IL	50 PLUS MPH GUST ESTIMATED.
Apr 10, 8:29 PM CDT	TSTM WND GST 50	Alton, IL
Apr 10, 8:29 PM CDT	TSTM WND GST 60	Edwardsville, IL

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
Apr 10, 1:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.1 hours before the alert went out and 196 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: 587 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

749 
WFUS53 KLSX 110104
TORLSX
ILC119-MOC183-189-110130-
/O.NEW.KLSX.TO.W.0010.130411T0104Z-130411T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
804 PM CDT WED APR 10 2013

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MADISON COUNTY IN SOUTHWEST ILLINOIS...
  EXTREME NORTHEASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  NORTHEASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 830 PM CDT

* AT 803 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR HAZELWOOD...AND MOVING EAST AT 60 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...
  FLORISSANT...BLACK JACK...SPANISH LAKE...ALTON...WOOD RIVER...
  BETHALTO...EDWARDSVILLE...WEST ALTON...HARTFORD...ROXANA AND POAG.

THIS WARNING INCLUDES CONFLUENCE 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.

&&

LAT...LON 3879 8989 3876 9038 3881 9039 3897 8999
TIME...MOT...LOC 0104Z 254DEG 51KT 3880 9035

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

$$

CVKING

4 follow-up statements

762 
WWUS53 KLSX 110106
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
806 PM CDT WED APR 10 2013

ILC119-MOC183-189-110130-
/O.CON.KLSX.TO.W.0010.000000T0000Z-130411T0130Z/
MADISON IL-ST. CHARLES MO-ST. LOUIS MO-
806 PM CDT WED APR 10 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN ST. LOUIS...
EXTREME NORTHEASTERN ST. CHARLES AND CENTRAL MADISON COUNTIES UNTIL
830 PM CDT...

AT 805 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR FLORISSANT...AND
MOVING EAST AT 60 MPH.

HAZARD...DAMAGING TORNADO.

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO TOUCHDOWN IN HAZELWOOD.

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...
BLACK JACK...SPANISH LAKE...ALTON...WOOD RIVER...BETHALTO...
EDWARDSVILLE...WEST ALTON...HARTFORD...ROXANA AND POAG.

THIS WARNING INCLUDES CONFLUENCE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 3879 8989 3876 9038 3881 9039 3897 8999
TIME...MOT...LOC 0107Z 254DEG 51KT 3881 9030

TORNADO...OBSERVED
HAIL...<.75IN

$$

CVKING

760 
WWUS53 KLSX 110112
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
812 PM CDT WED APR 10 2013

ILC119-MOC183-189-110130-
/O.CON.KLSX.TO.W.0010.000000T0000Z-130411T0130Z/
MADISON IL-ST. CHARLES MO-ST. LOUIS MO-
812 PM CDT WED APR 10 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN ST. LOUIS...
EXTREME EAST CENTRAL ST. CHARLES AND CENTRAL MADISON COUNTIES UNTIL
830 PM CDT...

AT 810 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR WEST ALTON...AND
MOVING NORTHEAST AT 60 MPH.

HAZARD...DAMAGING TORNADO.

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO TOUCHDOWN IN HAZELWOOD 
AND REPORTS OF DAMAGE IN FLORRISANT.

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...
WOOD RIVER...BETHALTO...HARTFORD AND ROXANA.

THIS WARNING INCLUDES CONFLUENCE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 3882 8991 3881 9014 3880 9026 3884 9028
      3897 8999
TIME...MOT...LOC 0112Z 244DEG 58KT 3886 9020

TORNADO...OBSERVED
HAIL...<.75IN

$$

CVKING

992 
WWUS53 KLSX 110116
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
816 PM CDT WED APR 10 2013

MOC183-189-110126-
/O.CAN.KLSX.TO.W.0010.000000T0000Z-130411T0130Z/
ST. CHARLES MO-ST. LOUIS MO-
816 PM CDT WED APR 10 2013

...THE TORNADO WARNING FOR NORTHEASTERN ST. LOUIS AND EXTREME EAST
CENTRAL ST. CHARLES COUNTIES IS CANCELLED...

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

LAT...LON 3888 8995 3886 9013 3888 9018 3889 9017
      3897 8999
TIME...MOT...LOC 0116Z 244DEG 58KT 3889 9012

$$

ILC119-110130-
/O.CON.KLSX.TO.W.0010.000000T0000Z-130411T0130Z/
MADISON IL-
816 PM CDT WED APR 10 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MADISON COUNTY
UNTIL 830 PM CDT...

AT 814 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR ALTON...AND
MOVING NORTHEAST AT 65 MPH.

HAZARD...DAMAGING TORNADO. 

SOURCE...LAW ENFORCEMENT AND SPOTTERS CONFIRMED TORNADO TOUCHDOWN IN 
HAZELWOOD...WITH DAMAGE REPORTS IN FLORRISANT AND WEST OF ALTON.

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...
BETHALTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 3888 8995 3886 9013 3888 9018 3889 9017
      3897 8999
TIME...MOT...LOC 0116Z 244DEG 58KT 3889 9012

TORNADO...OBSERVED
HAIL...<.75IN

$$

CVKING

577 
WWUS53 KLSX 110124
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
824 PM CDT WED APR 10 2013

ILC119-110133-
/O.EXP.KLSX.TO.W.0010.000000T0000Z-130411T0130Z/
MADISON IL-
824 PM CDT WED APR 10 2013

...THE TORNADO WARNING FOR CENTRAL MADISON COUNTY WILL EXPIRE AT 830
PM CDT...

THE ROTATION WITH THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED 
AND NO LONGER APPEARS TORNADIC.

LAT...LON 3888 8995 3886 9013 3888 9018 3889 9017
      3897 8999
TIME...MOT...LOC 0123Z 244DEG 58KT 3894 8999

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:25 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	50 min
Apr 10, 7:52 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Monroe, Saint Clair	23 min
Apr 10, 8:04 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	41 min
Apr 10, 8:07 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Jersey, Macoupin, Madison and 3 more	53 min
Apr 10, 8:08 PM CDT	Tornado Warning	LSX	Madison, Saint Clair	37 min
Apr 10, 8:11 PM CDT	Areal Flood Advisory	LSX	Adams, Brown, Pike	6 hr
Apr 10, 8:51 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	24 min
Apr 11, 11:57 AM CDT	River Flood Warning	LSX	Pike	95 days
Apr 11, 11:57 AM CDT	River Flood Warning	LSX	Pike	49 hr
Apr 11, 11:57 AM CDT	River Flood Warning	LSX	Pike	96 days
Apr 11, 11:57 AM CDT	River Flood Warning	LSX	Calhoun	97 days
Apr 11, 11:57 AM CDT	River Flood Warning	LSX	Jersey	96 days
Apr 10, 7:11 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Saint Charles, Saint Francois, Saint Louis and 1 more	49 min
Apr 10, 7:13 PM CDT	Areal Flood Advisory	LSX	Audrain, Crawford, Franklin, Gasconade, Monroe, Montgomery and 2 more	6 hr
Apr 10, 7:17 PM CDT	Tornado Warning	LSX	Franklin	28 min
Apr 10, 7:21 PM CDT	Tornado Warning	LSX	Franklin	24 min
Apr 10, 7:32 PM CDT	Tornado Warning	LSX	Franklin, Saint Charles, Saint Louis	28 min
Apr 10, 8:14 PM CDT	River Flood Warning	LSX	Reynolds	69 hr
Apr 10, 9:24 PM CDT	River Flood Warning	LSX	Marion	48 hr
Apr 11, 4:22 AM CDT	River Flood Warning	LSX	Lewis	40 hr
Apr 11, 4:22 AM CDT	River Flood Warning	LSX	Marion	47 hr
Apr 11, 4:39 AM CDT	River Flood Warning	LSX	Lincoln	52 hr
Apr 11, 4:39 AM CDT	River Flood Warning	LSX	Saint Charles	32 hr
Apr 11, 4:39 AM CDT	River Flood Warning	LSX	Monroe	54 hr
Apr 11, 6:44 AM CDT	River Flood Warning	LSX	Cole	39 hr
Apr 11, 8:27 AM CDT	River Flood Warning	LSX	Lewis	65 hr

Nearby

Tornado Warnings in Missouri, 2013 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.