Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 13, NWS St. Louis, MO

March 4, 20114 counties in Missouri

NWS St. Louis, MO issued this tornado warning at Mar 4, 2011, 3:49 PM CST for 4 counties in Missouri. It was in force for 56 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: Mar 4, 2011, 3:49 PM CST (21:49 UTC)
Expired: Mar 4, 2011, 4:45 PM CST
In force: 56 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Audrain County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 21:50 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
Mar 4, 3:51 PM CST	HAIL 0.25	Mexico, MO	PEA-SIZE HAIL AND HEAVY RAIN IN MEXICO.
Mar 4, 4:13 PM CST	HAIL 0.25	Perry, MO
Mar 4, 4:46 PM CST	TSTM WND DMG	Rush Hill, MO	TREES DOWN
Mar 4, 4:50 PM CST	HAIL 0.25	Bowling Green, MO

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
Mar 4, 1:33 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.8 hours before the alert went out and 267 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: 1266 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 213 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

899 
WFUS53 KLSX 042149
TORLSX
MOC007-137-163-173-042245-
/O.NEW.KLSX.TO.W.0013.110304T2149Z-110304T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
349 PM CST FRI MAR 4 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  SOUTHEASTERN MONROE COUNTY IN NORTHEAST MISSOURI...
  WESTERN PIKE COUNTY IN NORTHEAST MISSOURI...
  SOUTHERN RALLS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 445 PM CST

* AT 346 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR MEXICO...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SANTA FE...VANDALIA...BOWLING GREEN...LADDONIA...FARBER...PERRY...
  SPENCERBURG...CURRYVILLE...FRANKFORD...BENTON CITY...RUSH HILL...
  ASHLEY...ST. CLEMENT AND CYRENE.

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 3960 9120 3928 9107 3915 9159 3915 9164
      3913 9164 3906 9190 3938 9190 3949 9159
TIME...MOT...LOC 2149Z 245DEG 34KT 3917 9182

$$

KANOFSKY

1 follow-up statement

895 
WWUS53 KLSX 042219
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
419 PM CST FRI MAR 4 2011

MOC007-137-163-173-042245-
/O.CON.KLSX.TO.W.0013.000000T0000Z-110304T2245Z/
AUDRAIN MO-PIKE MO-MONROE MO-RALLS MO-
419 PM CST FRI MAR 4 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN AUDRAIN COUNTY IN
CENTRAL MISSOURI...AND SOUTHERN RALLS...SOUTHEASTERN MONROE AND
WESTERN PIKE COUNTIES IN NORTHEAST MISSOURI UNTIL 445 PM CST...

AT 415 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR FARBER...OR NEAR VANDALIA...MOVING NORTHEAST
AT 40 MPH.

NUMEROUS REPORTS OF WALL CLOUDS HAVE BEEN RECEIVED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  VANDALIA...BOWLING GREEN...SPENCERBURG...CURRYVILLE...FRANKFORD...
  ASHLEY...ST. CLEMENT AND CYRENE.

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 3960 9120 3928 9107 3915 9159 3915 9164
      3913 9164 3912 9169 3941 9181 3949 9159
TIME...MOT...LOC 2218Z 245DEG 34KT 3928 9150

$$

KANOFSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 2:47 PM CST	Severe Thunderstorm Warning	LSX	Boone	43 min
Mar 4, 3:13 PM CST	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau, Osage	47 min
Mar 4, 3:20 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Boone	40 min
Mar 4, 3:28 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Montgomery	47 min
Mar 4, 3:34 PM CST	Tornado Warning	LSX	Boone, Callaway, Montgomery	41 min
Mar 4, 3:45 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Ralls	45 min
Mar 4, 3:59 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 3 more	46 min
Mar 4, 4:27 PM CST	Tornado Warning	LSX	Lincoln, Montgomery, Warren	33 min
Mar 4, 4:39 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Lincoln, Pike, Saint Charles, Warren	51 min
Mar 4, 4:40 PM CST	Tornado Warning	LSX	Pike	51 min
Mar 4, 5:23 PM CST	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	29 min

Nearby

Tornado Warnings in Missouri, 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.