Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 14, NWS St. Louis, MO

March 4, 2011Lincoln County, Montgomery County, Warren County, Missouri

NWS St. Louis, MO issued this tornado warning at Mar 4, 2011, 4:27 PM CST for Lincoln County, Montgomery County, Warren County, Missouri. It was in force for 33 min. 3 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, 4:27 PM CST (22:27 UTC)
Expired: Mar 4, 2011, 5:00 PM CST
In force: 33 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Lincoln County, MO, Montgomery County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 49 km from the middle of the area, began a volume at 22:28 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, 4:34 PM CST	HAIL 0.7	Jonesburg, MO
Mar 4, 4:36 PM CST	HAIL 0.7	1 W Warrenton, MO
Mar 4, 4:43 PM CST	HAIL 0.25	Warrenton, MO	PEA-SIZE HAIL COMPLETELY COVERING THE GROUND.

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, 10.5 hours before the alert went out and 262 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.

144 
WFUS53 KLSX 042227
TORLSX
MOC113-139-219-042300-
/O.NEW.KLSX.TO.W.0014.110304T2227Z-110304T2300Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 500 PM CST

* AT 424 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
  TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE. THIS
  DANGEROUS STORM WAS LOCATED NEAR BIG SPRING...OR 9 MILES NORTH OF
  HERMANN...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WARRENTON...JONESBURG...TRUESDALE...HAWK POINT AND CAVE.

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.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 3905 9105 3893 9101 3877 9107 3871 9144
      3889 9151
TIME...MOT...LOC 2227Z 253DEG 44KT 3884 9136

$$

CARNEY

1 follow-up statement

377 
WWUS53 KLSX 042256
SVSLSX

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

MOC113-139-219-042306-
/O.EXP.KLSX.TO.W.0014.000000T0000Z-110304T2300Z/
WARREN MO-MONTGOMERY MO-LINCOLN MO-
456 PM CST FRI MAR 4 2011

...THE TORNADO WARNING FOR SOUTHWESTERN LINCOLN...MONTGOMERY AND
NORTHERN WARREN COUNTIES WILL EXPIRE AT 500 PM CST...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA AND THE ROTATION OBSERVED BY RADAR HAS ALSO WEAKENED.  
HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR A 
PORTION OF THE AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM.

LAT...LON 3905 9105 3893 9101 3877 9107 3871 9144
      3889 9151
TIME...MOT...LOC 2256Z 253DEG 44KT 3894 9092

$$

CARNEY

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, 3:49 PM CST	Tornado Warning	LSX	Audrain, Monroe, Pike, Ralls	56 min
Mar 4, 3:59 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 3 more	46 min
Mar 4, 4:39 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.