Alert archive / Illinois / Tornado Warnings in 2012

Tornado Warning 25, NWS St. Louis, MO

September 25, 2012Washington County, Illinois

NWS St. Louis, MO issued this tornado warning at Sep 25, 2012, 5:19 PM CDT for Washington County, Illinois. It was in force for 26 min. 8 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: Sep 25, 2012, 5:19 PM CDT (22:19 UTC)
Expired: Sep 25, 2012, 5:45 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

County Washington County, IL

The radar

The St Louis radar (KLSX), 106 km from the middle of the area, began a volume at 22:22 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
Sep 25, 5:22 PM CDT	TORNADO	1 N Okawville, IL	* 1 INJ * ONE SEMI BLOWN OVER WHEN THE TORNADO CROSSED I64. ONE MINOR INJURY. TIME AND LOCATION ESTIMATED FROM RADAR.
Sep 25, 5:34 PM CDT	TORNADO	1 N Okawville, IL	* 1 INJ * ONE SEMI BLOWN OVER WHEN THE TORNADO CROSSED I64. ONE MINOR INJURY REQUIRING HOSPITALIZATION. TIME AND LOCATION ESTIMATED FROM RADAR.
Sep 25, 5:35 PM CDT	TSTM WND DMG	4 E Okawville, IL	* 1 INJ * ONE SEMI BLOWN OVER ON I64 AT MILE MARKER 44 ASSOCIATED WITH REAR FLANK DOWNDRAFT WINDS. ONE MINOR INJURY REQUIRING HOSPITALIZATION.
Sep 25, 5:35 PM CDT	TORNADO	2 E Okawville, IL	TORNADO DAMAGE JUST NORTH OF 177...FIRST FARM ROOF DAMAGED WITH SHINGLES GONE... ROOF TWISTED OFF METAL SHEDS.
Sep 25, 5:35 PM CDT	TORNADO	3 E Okawville, IL	30 FOOT BY 80 FOOT METAL SHED DESTROYED. 3 FARM HOUSES DAMAGED WITH PARTIAL REMOVAL OF ROOFS. GARAGE DOORS CAVED IN AND DAMAGE TO SIDING.
Sep 25, 5:36 PM CDT	TORNADO	1 E Okawville, IL	TORNADO REPORTED BY SHERIFFS DEPUTIES NEAR ADDIEVILLE WITH A SEMI TRAILER BLOWN OVER ON I-64 AT MILEPOST 40.5.
Sep 25, 5:48 PM CDT	TORNADO	2 E Okawville, IL	TORNADO DAMAGE JUST NORTH OF 177...FIRST FARM ROOF DAMAGED WITH SHINGLES GONE... ROOF TWISTED OFF METAL SHEDS.
Sep 25, 5:50 PM CDT	FUNNEL CLOUD	2 E Okawville, IL	ALONG HIGHWAY 177... FUNNEL CLOUD 2 MILES EAST OF OKAWVILLE.

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
Sep 25, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.3 hours before the alert went out and 204 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: 221 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

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

830 
WFUS53 KLSX 252219
TORLSX
ILC189-252245-
/O.NEW.KLSX.TO.W.0025.120925T2219Z-120925T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
519 PM CDT TUE SEP 25 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 545 PM CDT

* AT 517 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR OKAWVILLE...AND MOVING EAST AT 25 MPH.

  HAZARD...DEVELOPING TORNADO AND TENNIS BALL SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.  IN ADDITION...SPOTTERS HAVE 
           REPORTED HAIL TO TENNIS BALL SIZE WITH THIS STORM AT 
           AVISTON AT 511 PM.

  IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE
           HOMES COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR
           SNAPPED. VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.

* LOCATIONS IMPACTED INCLUDE...
  FROGTOWN AND COVINGTON.

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.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.

&&

LAT...LON 3836 8941 3846 8960 3847 8960 3848 8957
      3847 8954 3848 8953 3847 8952 3847 8947
      3849 8945 3849 8939
TIME...MOT...LOC 2219Z 291DEG 21KT 3848 8955

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

TES

2 follow-up statements

162 
WWUS53 KLSX 252225
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
525 PM CDT TUE SEP 25 2012

ILC189-252245-
/O.CON.KLSX.TO.W.0025.000000T0000Z-120925T2245Z/
WASHINGTON IL-
525 PM CDT TUE SEP 25 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL WASHINGTON
COUNTY UNTIL 545 PM CDT...

AT 522 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR OKAWVILLE...AND
MOVING SOUTHEAST AT 25 MPH.

HAZARD...DAMAGING TORNADO AND TENNIS BALL SIZE HAIL.

SOURCE...WEATHER SPOTTERS CONFIRMED THE TORNADO NEAR DAMIANSVILLE AT 
         519 PM.

IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE HOMES
         COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR SNAPPED.
         VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.

LOCATIONS IMPACTED INCLUDE...
FROGTOWN AND COVINGTON.

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.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.

&&

LAT...LON 3836 8941 3846 8960 3847 8960 3848 8957
      3847 8954 3848 8953 3847 8952 3847 8947
      3849 8945 3849 8939
TIME...MOT...LOC 2225Z 293DEG 23KT 3847 8953

TORNADO...OBSERVED
HAIL...2.50IN

$$

TES

819 
WWUS53 KLSX 252240
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
540 PM CDT TUE SEP 25 2012

ILC189-252245-
/O.CON.KLSX.TO.W.0025.000000T0000Z-120925T2245Z/
WASHINGTON IL-
540 PM CDT TUE SEP 25 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL WASHINGTON
COUNTY UNTIL 545 PM CDT...

AT 535 PM CDT...A CONFIRMED TORNADO WAS LOCATED 6 MILES EAST OF
OKAWVILLE...AND MOVING EAST AT 30 MPH.

HAZARD...DAMAGING TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO NEAR ADDIEVILLE AROUND 
         535 PM.

IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE HOMES
         COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR SNAPPED.
         VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.

LOCATIONS IMPACTED INCLUDE...

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.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.

&&

LAT...LON 3836 8941 3846 8960 3847 8960 3848 8957
      3847 8954 3848 8953 3847 8952 3847 8947
      3849 8945 3849 8939
TIME...MOT...LOC 2240Z 292DEG 26KT 3842 8939

TORNADO...OBSERVED
HAIL...1.75IN

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 3:38 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Marion	22 min
Sep 25, 4:36 AM CDT	Areal Flood Advisory	LSX	Pike	5 hr
Sep 25, 4:29 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	46 min
Sep 25, 4:39 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair	51 min
Sep 25, 5:05 PM CDT	Severe Thunderstorm Warning	LSX	Clinton	55 min
Sep 25, 5:07 PM CDT	Tornado Warning	LSX	Clinton	23 min
Sep 25, 5:09 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	51 min
Sep 25, 5:12 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair	18 min
Sep 25, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Marion	47 min
Sep 25, 5:34 PM CDT	Tornado Warning Tornado observed	LSX	Washington	41 min
Sep 25, 5:43 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Washington	62 min
Sep 25, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Monroe, Saint Clair	52 min
Sep 25, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Washington	46 min
Sep 25, 6:19 PM CDT	Areal Flood Advisory	LSX	Clinton, Marion, Washington	6 hr
Sep 25, 6:30 PM CDT	Severe Thunderstorm Warning	LSX	Marion	26 min
Sep 25, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Madison, Marion, Washington	45 min
Sep 25, 6:50 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	46 min

Nearby

Tornado Warnings in Illinois, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.