Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 30, NWS St. Louis, MO

April 19, 2011Madison County, Sainte Genevieve County, Saint Francois County, Missouri; Randolph County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 19, 2011, 7:34 PM CDT for Madison County, Sainte Genevieve County, Saint Francois County, Missouri; Randolph County, Illinois. It was in force for 41 min. 4 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 19, 2011, 7:34 PM CDT (00:34 UTC)
Expired: Apr 19, 2011, 8:15 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Randolph County, IL, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 00:36 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 19, 7:56 PM CDT	FUNNEL CLOUD	2 Ssw Ste. Genevieve, MO	POSSIBLE TORNADO. SPOTTER WAS IN ST. MARY LOOKING NORTHWEST AND SAW A FUNNEL CLOUD WITH POWER FLASHES ALONG THE GROUND.
Apr 19, 7:56 PM CDT	TSTM WND DMG	Farmington, MO	TREES DOWN AT HWY 67 AND 221
Apr 19, 7:59 PM CDT	TSTM WND DMG	Ste. Genevieve, MO	POWER POLES AND TREES DOWN IN STE. GENEVIEVE
Apr 19, 8:15 PM CDT	TSTM WND DMG	Ste. Genevieve, MO	REPORT OF ROOF DAMAGE TO A HARDWARE STORE

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 19, 1:00 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.6 hours before the alert went out and 306 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: 2409 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 523 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 547 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 24.4

Open this sounding in Storm Lab

The text

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

616 
WFUS53 KLSX 200034
TORLSX
ILC157-MOC123-186-187-200115-
/O.NEW.KLSX.TO.W.0030.110420T0034Z-110420T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
734 PM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  NORTHWESTERN MADISON COUNTY IN SOUTHEAST MISSOURI...
  STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 815 PM CDT

* AT 732 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR ROSELLE...OR 7 MILES NORTHEAST OF IRONTON...
  AND MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FARMINGTON...STE. GENEVIEVE...KNOB LICK...WOMAC...COFFMAN...
  WEINGARTEN...ROCKY RIDGE...ST. MARY...DOE RUN...LEADINGTON...
  LIBERTYVILLE...RIVER AUX VASES...MINNITH AND KELLOGG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.

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 3764 9054 3764 9061 3773 9065 3776 9065
      3804 9007 3787 8990 3788 8993 3783 9000
      3768 9010 3754 9055
TIME...MOT...LOC 0035Z 245DEG 49KT 3766 9049

$$

CVKING

1 follow-up statement

549 
WWUS53 KLSX 200111
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
811 PM CDT TUE APR 19 2011

ILC157-MOC123-186-187-200121-
/O.EXP.KLSX.TO.W.0030.000000T0000Z-110420T0115Z/
RANDOLPH IL-MADISON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-
811 PM CDT TUE APR 19 2011

...THE TORNADO WARNING FOR STE. GENEVIEVE...ST. FRANCOIS...
NORTHWESTERN MADISON AND SOUTHWESTERN RANDOLPH COUNTIES WILL EXPIRE
AT 815 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 9 PM.

LAT...LON 3764 9054 3764 9061 3773 9065 3776 9065
      3804 9007 3787 8990 3788 8993 3783 9000
      3768 9010 3754 9055
TIME...MOT...LOC 0111Z 245DEG 49KT 3787 8993

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:03 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	42 min
Apr 19, 7:05 PM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	5 hr
Apr 19, 7:17 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	28 min
Apr 19, 7:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis	42 min
Apr 19, 7:25 PM CDT	Tornado Warning	LSX	Iron, Madison, Saint Francois	40 min
Apr 19, 7:29 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	46 min
Apr 19, 7:30 PM CDT	Tornado Warning	LSX	Saint Louis, City of Saint Louis	45 min
Apr 19, 7:37 PM CDT	Tornado Warning	LSX	Jefferson, Saint Louis	36 min
Apr 19, 7:39 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Washington	33 min
Apr 19, 7:48 PM CDT	Tornado Warning	LSX	Madison	27 min
Apr 19, 7:54 PM CDT	Tornado Warning	LSX	Sainte Genevieve	36 min
Apr 19, 9:37 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	21 min
Apr 19, 7:35 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Montgomery	40 min
Apr 19, 7:51 PM CDT	Tornado Warning	LSX	Saint Clair	39 min
Apr 19, 7:56 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Montgomery	34 min
Apr 19, 8:00 PM CDT	Tornado Warning	LSX	Bond, Clinton, Madison	45 min
Apr 19, 8:02 PM CDT	Areal Flood Advisory	LSX	Bond, Macoupin, Montgomery	4 hr
Apr 19, 8:18 PM CDT	Tornado Warning	LSX	Randolph, Saint Clair, Washington	42 min
Apr 19, 8:25 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair	22 min
Apr 19, 8:33 PM CDT	Tornado Warning	LSX	Fayette	42 min
Apr 19, 8:33 PM CDT	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion, Washington	57 min
Apr 19, 9:41 PM CDT	River Flood Warning	LSX	Fayette	13 days

Nearby

Tornado Warnings in Missouri, 2011 Tornado Warnings in Illinois, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.