Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 18, NWS St. Louis, MO

March 4, 20119 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 4, 2011, 3:59 PM CST for 9 counties in Missouri. It was in force for 46 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: Mar 4, 2011, 3:59 PM CST (21:59 UTC)
Expired: Mar 4, 2011, 4:45 PM CST
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Audrain County, MO, Callaway County, MO, Franklin County, MO, Gasconade County, MO, Lincoln County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 22:03 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, 4:03 PM CST	TSTM WND GST 78	4 E Portland, MO
Mar 4, 4:21 PM CST	HAIL 0.7	10 W Hermann, MO	COVERING THE GROUND
Mar 4, 4:26 PM CST	HAIL 0.25	Montgomery City, MO
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, 4:41 PM CST	HAIL 0.7	3 W Hermann, MO
Mar 4, 4:43 PM CST	HAIL 0.25	Warrenton, MO	PEA-SIZE HAIL COMPLETELY COVERING THE GROUND.
Mar 4, 4:45 PM CST	HAIL 0.25	1 Ese Truxton, MO	PEA-SIZED HAIL BETWEEN TRUXTON AND HAWK POINT... BUT CLOSER TO TRUXTON.

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

Springfield, MO (KSGF), launched 12:00Z, 10.0 hours before the alert went out and 271 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: 18 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 313 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

743 
WUUS53 KLSX 042159
SVRLSX
MOC007-027-071-073-113-139-151-163-219-042245-
/O.NEW.KLSX.SV.W.0018.110304T2159Z-110304T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
359 PM CST FRI MAR 4 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  EASTERN CALLAWAY COUNTY IN CENTRAL MISSOURI...
  NORTHWESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  WESTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN OSAGE COUNTY IN CENTRAL MISSOURI...
  SOUTHWESTERN PIKE COUNTY IN NORTHEAST MISSOURI...
  WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 445 PM CST

* AT 354 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF 
  AUXVASSE TO TO 8 MILES SOUTHEAST OF FULTON TO 8 MILES SOUTHWEST OF 
  CHAMOIS TO WESTPHALIA...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LINN...MONTGOMERY CITY...WELLSVILLE...HERMANN...WARRENTON...NEW
  HAVEN...CHAMOIS...WILLIAMSBURG...SHAMROCK...MINEOLA...
  MARTINSBURG...BIG SPRING...NEW FLORENCE...BUELL...BELLFLOWER...
  JONESBURG...HAWK POINT...NEW HARTFORD...TRUESDALE AND TRELOAR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

INTENSE SQUALL LINES CAN OCCASIONALLY PRODUCE BRIEF TORNADOES IN
ADDITION TO WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT
IMMEDIATELY LIKELY...FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 3847 9209 3848 9203 3850 9201 3854 9202
      3859 9196 3859 9198 3879 9193 3895 9197
      3904 9207 3927 9115 3910 9106 3893 9101
      3876 9108 3852 9124 3842 9212
TIME...MOT...LOC 2158Z 257DEG 39KT 3908 9193 3897 9182
          3881 9177 3863 9184 3847 9195
WIND...HAIL 70MPH 1.00IN

$$

CARNEY

2 follow-up statements

369 
WWUS53 KLSX 042219 RRA
SVSLSX

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

MOC007-027-071-073-113-139-151-163-219-042245-
/O.CON.KLSX.SV.W.0018.000000T0000Z-110304T2245Z/
FRANKLIN MO-OSAGE MO-GASCONADE MO-WARREN MO-CALLAWAY MO-MONTGOMERY 
MO-LINCOLN MO-AUDRAIN MO-PIKE MO-
419 PM CST FRI MAR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
AUDRAIN...EASTERN CALLAWAY AND NORTHEASTERN OSAGE COUNTIES IN CENTRAL
MISSOURI...AND WESTERN LINCOLN...MONTGOMERY...WARREN...GASCONADE AND
NORTHWESTERN FRANKLIN COUNTIES IN EAST CENTRAL MISSOURI...AND
SOUTHWESTERN PIKE COUNTY IN NORTHEAST MISSOURI UNTIL 445 PM CST...

AT 415 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 80 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM MARTINSBURG TO MONTGOMERY CITY TO MINEOLA TO 8 MILES
SOUTHWEST OF HERMANN TO 6 MILES NORTHWEST OF MOUNT STERLING...MOVING
EAST AT 45 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING
WINDS.

IN ADDITION...AT 400 PM 78 MPH WIND WAS REPORTED JUST EAST OF 
PORTLAND MISSOURI WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  HERMANN...WARRENTON...NEW HAVEN...BIG SPRING...NEW FLORENCE...
  BUELL...BELLFLOWER...JONESBURG...NEW HARTFORD...HAWK POINT...
  TRUESDALE...TRELOAR...MCKITTRICK...HIGH HILL...MIDDLETOWN...BAY...
  SWISS...BERGER...TRUXTON AND OLNEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

INTENSE SQUALL LINES CAN OCCASIONALLY PRODUCE BRIEF TORNADOES IN
ADDITION TO WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT
IMMEDIATELY LIKELY...FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 3848 9187 3859 9183 3882 9172 3897 9175
      3908 9176 3927 9115 3910 9106 3893 9101
      3876 9108 3852 9124
TIME...MOT...LOC 2218Z 257DEG 39KT 3913 9156 3901 9151
          3886 9149 3866 9152 3852 9167
WIND...HAIL 80MPH 0.88IN

$$

CARNEY

128 
WWUS53 KLSX 042233
SVSLSX

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

MOC007-027-151-042243-
/O.CAN.KLSX.SV.W.0018.000000T0000Z-110304T2245Z/
OSAGE MO-CALLAWAY MO-AUDRAIN MO-
433 PM CST FRI MAR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN AUDRAIN...EASTERN
CALLAWAY AND NORTHEASTERN OSAGE COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.  HOWEVER...A SEVERE THUNDERSTORM WATCH REMAINS IN 
EFFECT UNTIL 700 PM.

LAT...LON 3912 9164 3915 9153 3915 9142 3919 9142
      3927 9115 3910 9106 3893 9101 3876 9108
      3852 9124 3849 9165
TIME...MOT...LOC 2233Z 257DEG 39KT 3919 9134 3905 9129
          3890 9125 3871 9129 3855 9145

$$

MOC071-073-113-139-163-219-042245-
/O.CON.KLSX.SV.W.0018.000000T0000Z-110304T2245Z/
FRANKLIN MO-GASCONADE MO-WARREN MO-MONTGOMERY MO-LINCOLN MO-PIKE MO-
433 PM CST FRI MAR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
LINCOLN...MONTGOMERY...WARREN...GASCONADE AND NORTHWESTERN FRANKLIN
COUNTIES IN EAST CENTRAL MISSOURI...AND SOUTHWESTERN PIKE COUNTY IN
NORTHEAST MISSOURI UNTIL 445 PM CST...

AT 428 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 7 MILES WEST OF NEW HARTFORD TO
BELLFLOWER TO JONESBURG TO HERMANN TO 6 MILES NORTHWEST OF DRAKE...
MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  WARRENTON...NEW HAVEN...NEW HARTFORD...HAWK POINT...TRUESDALE...
  TRELOAR...TRUXTON...OLNEY...HOLSTEIN AND CAVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN
THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

INTENSE SQUALL LINES CAN OCCASIONALLY PRODUCE BRIEF TORNADOES IN
ADDITION TO WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT
IMMEDIATELY LIKELY...FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE
POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 3912 9164 3915 9153 3915 9142 3919 9142
      3927 9115 3910 9106 3893 9101 3876 9108
      3852 9124 3849 9165
TIME...MOT...LOC 2233Z 257DEG 39KT 3919 9134 3905 9129
          3890 9125 3871 9129 3855 9145
WIND...HAIL 80MPH 1.00IN

$$

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, 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

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning 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.