Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 302, NWS St. Louis, MO

June 13, 2011Audrain County, Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 13, 2011, 6:42 AM CDT for Audrain County, Callaway County, Missouri. It was in force for 48 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: Jun 13, 2011, 6:42 AM CDT (11:42 UTC)
Expired: Jun 13, 2011, 7:30 AM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Audrain County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 112 km from the middle of the area, began a volume at 11:42 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
Jun 13, 6:57 AM CDT	HAIL 1.75	3 E Mexico, MO
Jun 13, 7:00 AM CDT	HAIL 1.75	1 W Mexico, MO
Jun 13, 7:14 AM CDT	HAIL 0.88	4 Sw Benton City, 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
Jun 13, 5:16 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 11.7 hours before the alert went out and 297 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: 1637 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

032 
WUUS53 KLSX 131142
SVRLSX
MOC007-027-131230-
/O.NEW.KLSX.SV.W.0302.110613T1142Z-110613T1230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
642 AM CDT MON JUN 13 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  NORTHEASTERN CALLAWAY COUNTY IN CENTRAL MISSOURI...

* UNTIL 730 AM CDT

* AT 638 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 7 MILES SOUTH OF CENTRALIA...AND MOVING EAST
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MEXICO...AUXVASSE...SHAMROCK...MARTINSBURG...THOMPSON...HATTON...
  VANDIVER AND BENTON CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

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

&&

LAT...LON 3907 9211 3923 9211 3917 9162 3915 9162
      3914 9163 3891 9164 3905 9212
TIME...MOT...LOC 1142Z 283DEG 23KT 3912 9206
WIND...HAIL <50MPH 1.50IN

$$

TILLY

2 follow-up statements

869 
WWUS53 KLSX 131200
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
700 AM CDT MON JUN 13 2011

MOC007-027-131230-
/O.CON.KLSX.SV.W.0302.000000T0000Z-110613T1230Z/
CALLAWAY MO-AUDRAIN MO-
700 AM CDT MON JUN 13 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
AUDRAIN AND NORTHEASTERN CALLAWAY COUNTIES UNTIL 730 AM CDT...

AT 656 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL.  THIS STORM WAS LOCATED 6
MILES SOUTHWEST OF MEXICO...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MEXICO...AUXVASSE...SHAMROCK...MARTINSBURG...VANDIVER AND BENTON
  CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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

&&

LAT...LON 3920 9197 3917 9162 3915 9162 3914 9163
      3891 9164 3906 9203
TIME...MOT...LOC 1200Z 283DEG 25KT 3909 9190
WIND...HAIL <50MPH 1.75IN

$$

TILLY

727 
WWUS53 KLSX 131226
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
726 AM CDT MON JUN 13 2011

MOC007-027-131236-
/O.EXP.KLSX.SV.W.0302.000000T0000Z-110613T1230Z/
CALLAWAY MO-AUDRAIN MO-
726 AM CDT MON JUN 13 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL AUDRAIN AND
NORTHEASTERN CALLAWAY COUNTIES WILL EXPIRE AT 730 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT. 

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

LAT...LON 3920 9197 3917 9162 3915 9162 3914 9163
      3891 9164 3906 9203
TIME...MOT...LOC 1226Z 284DEG 24KT 3905 9166

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 5:49 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Osage	26 min
Jun 13, 5:55 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	50 min
Jun 13, 6:13 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Gasconade, Osage	47 min
Jun 13, 6:57 AM CDT	Areal Flood Advisory	LSX	Gasconade, Osage	3 hr
Jun 13, 7:11 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	49 min
Jun 13, 7:14 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Gasconade	46 min
Jun 13, 7:33 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	42 min
Jun 13, 7:55 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	50 min
Jun 13, 8:07 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	53 min
Jun 13, 8:27 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds, Washington	48 min
Jun 13, 8:33 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis, Warren	42 min
Jun 13, 8:51 AM CDT	Areal Flood Advisory	LSX	Crawford	6 hr
Jun 13, 8:55 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Cole, Moniteau	50 min
Jun 13, 9:19 AM CDT	Severe Thunderstorm Warning	LSX	Reynolds	41 min
Jun 13, 9:44 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	30 min
Jun 13, 2:57 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Marion	48 min
Jun 13, 3:37 PM CDT	Severe Thunderstorm Warning	LSX	Marion	38 min
Jun 13, 4:02 PM CDT	Flash Flood Watch	LSX	Audrain, Franklin, Jefferson, Knox, Lewis, Lincoln and 13 more	39 hr
Jun 13, 4:54 PM CDT	Areal Flood Advisory	LSX	Lewis	6 hr

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.