Alert archive / Illinois / Tornado Warnings in 2013

Tornado Warning 6, NWS St. Louis, MO

April 10, 2013Washington County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 10, 2013, 4:43 PM CDT for Washington County, Illinois. It was in force for 17 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: Apr 10, 2013, 4:43 PM CDT (21:43 UTC)
Expired: Apr 10, 2013, 5:00 PM CDT
In force: 17 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Washington County, IL

The radar

The Evansville,IN radar (KVWX), 128 km from the middle of the area, began a volume at 21:43 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, 4:51 PM CDT	FUNNEL CLOUD	Ashley, IL	HIGHWAY 15 NEAR ASHLEY MOVING NORTHEAST.

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 12:00Z, 9.7 hours before the alert went out and 210 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: 2649 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 701 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 15.4

Open this sounding in Storm Lab

The text

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

447 
WFUS53 KLSX 102143
TORLSX
ILC189-102200-
/O.NEW.KLSX.TO.W.0006.130410T2143Z-130410T2200Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 500 PM CDT

* AT 440 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR ASHLEY...AND MOVING NORTHEAST AT 30 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...
  MAINLY RURAL AREAS OF EXTREME EASTERN WASHINGTON COUNTY.

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 3826 8924 3843 8923 3843 8914 3829 8914
      3826 8914
TIME...MOT...LOC 2143Z 244DEG 28KT 3832 8915

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

$$

KANOFSKY

2 follow-up statements

780 
WWUS53 KLSX 102144
SVSLSX

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

ILC189-102200-
/O.CON.KLSX.TO.W.0006.000000T0000Z-130410T2200Z/
WASHINGTON IL-
444 PM CDT WED APR 10 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL WASHINGTON
COUNTY UNTIL 500 PM CDT...

AT 440 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR ASHLEY...AND MOVING NORTHEAST AT 30 MPH.

HAZARD...DEVELOPING TORNADO.

SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 2 MILES SOUTH OF   
         ASHLEY.

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 3826 8924 3843 8923 3843 8914 3829 8914
      3826 8914
TIME...MOT...LOC 2145Z 244DEG 28KT 3833 8913

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

$$

KANOFSKY

246 
WWUS53 KLSX 102157
SVSLSX

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

ILC189-102207-
/O.EXP.KLSX.TO.W.0006.000000T0000Z-130410T2200Z/
WASHINGTON IL-
457 PM CDT WED APR 10 2013

...THE TORNADO WARNING FOR EAST CENTRAL WASHINGTON COUNTY WILL EXPIRE
AT 500 PM CDT...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 900 PM.

LAT...LON 3826 8924 3843 8923 3843 8914 3829 8914
      3826 8914
TIME...MOT...LOC 2157Z 244DEG 28KT 3837 8902

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 3:16 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Madison	44 min
Apr 10, 3:19 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	41 min
Apr 10, 3:26 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	49 min
Apr 10, 4:08 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin	52 min
Apr 10, 4:20 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison	40 min
Apr 10, 4:38 PM CDT	Severe Thunderstorm Warning	LSX	Washington	37 min
Apr 10, 4:48 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	42 min
Apr 10, 4:59 PM CDT	Severe Thunderstorm Warning	LSX	Marion	46 min

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.