Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 335, NWS St. Louis, MO

June 18, 20116 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 2011, 3:12 AM CDT for 6 counties in Missouri. It was in force for 63 min. 5 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 18, 2011, 3:12 AM CDT (08:12 UTC)
Expired: Jun 18, 2011, 4:15 AM CDT
In force: 63 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 08:12 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
Jun 18, 3:33 AM CDT	TSTM WND DMG	Tipton, MO	LARGE TREE DOWN AND ROOF PARTIALLY OFF A METAL OUTBUILDING IN TIPTON.
Jun 18, 3:50 AM CDT	TSTM WND DMG	Columbia, MO	TWO TREES HAVE FALLEN ONTO A HOUSE IN COLUMBIA
Jun 18, 4:02 AM CDT	TSTM WND DMG	Hallsville, MO	POWER LINES DOWN...TRANSFORMER ON FIRE.
Jun 18, 4:12 AM CDT	TSTM WND GST 40	Taos, MO
Jun 18, 4:15 AM CDT	TSTM WND DMG	Fulton, MO	TREES AND POWER LINES DOWN IN FULTON...TREE ALSO FELL ON A CAR AT WESTMINSTER COLLEGE IN FULTON. A STREET SIGN WAS PULLED OUT OF THE GROUND AND BLEW PAST A POLICEMAN JUST WEST OF FULTON.

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 18, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.2 hours before the alert went out and 237 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: 3544 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

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

241 
WUUS53 KLSX 180812
SVRLSX
MOC007-019-027-051-135-151-180915-
/O.NEW.KLSX.SV.W.0335.110618T0812Z-110618T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
312 AM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...
  BOONE COUNTY IN CENTRAL MISSOURI...
  CALLAWAY COUNTY IN CENTRAL MISSOURI...
  COLE COUNTY IN CENTRAL MISSOURI...
  MONITEAU COUNTY IN CENTRAL MISSOURI...
  WESTERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 415 AM CDT

* AT 308 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 13 MILES SOUTHWEST OF KEYTESVILLE TO 7 MILES NORTH
  OF PILOT GROVE TO 8 MILES NORTHWEST OF VERSAILLES TO 18 MILES WEST
  OF LAURIE...AND MOVING EAST AT 45 MPH. PENNY SIZE HAIL MAY ALSO
  ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  TIPTON...CALIFORNIA...COLUMBIA...ASHLAND...JEFFERSON CITY...HOLTS
  SUMMIT...CENTRALIA...FULTON...CLARKSBURG...HIGH POINT...
  ROCHEPORT...JAMESTOWN...MCGIRK...MIDWAY...RUSSELLVILLE...
  CENTERTOWN...EASLEY...ST. MARTINS...HICKORY HILL AND BRAZITO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE 
ACROSS WESTERN MISSOURI. THIS IS AN EXTREMELY DANGEROUS SITUATION. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS.

&&

LAT...LON 3869 9284 3869 9262 3891 9251 3897 9257
      3901 9257 3924 9244 3925 9232 3935 9230
      3934 9199 3899 9183 3855 9183 3829 9207
      3829 9219 3833 9220 3832 9226 3834 9229
      3833 9240 3842 9241 3843 9263 3860 9285
TIME...MOT...LOC 0811Z 269DEG 41KT 3936 9312 3897 9286
          3853 9286 3830 9310
WIND...HAIL 70MPH 0.75IN

$$

BRITT

2 follow-up statements

187 
WWUS53 KLSX 180828
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
328 AM CDT SAT JUN 18 2011

MOC007-019-027-051-135-151-180915-
/O.CON.KLSX.SV.W.0335.000000T0000Z-110618T0915Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-AUDRAIN MO-
328 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
AUDRAIN...WESTERN OSAGE...MONITEAU...COLE...CALLAWAY AND BOONE
COUNTIES UNTIL 415 AM CDT...

AT 326 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 5 MILES SOUTH OF KEYTESVILLE TO BOONVILLE TO 6 MILES
NORTHWEST OF HIGH POINT TO 8 MILES NORTHWEST OF LAURIE...MOVING EAST
AT 45 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  CALIFORNIA...COLUMBIA...ASHLAND...JEFFERSON CITY...HOLTS SUMMIT...
  CENTRALIA...FULTON...HIGH POINT...ROCHEPORT...JAMESTOWN...MCGIRK...
  RUSSELLVILLE...MIDWAY...CENTERTOWN...EASLEY...ST. MARTINS...HICKORY
  HILL...BRAZITO...WARDSVILLE AND MURRY.

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 3869 9284 3869 9262 3891 9251 3897 9257
      3901 9257 3924 9244 3925 9232 3935 9230
      3934 9199 3899 9183 3855 9183 3829 9207
      3829 9219 3833 9220 3832 9226 3834 9229
      3833 9240 3842 9241 3843 9263 3860 9285
TIME...MOT...LOC 0828Z 269DEG 41KT 3936 9291 3897 9266
          3853 9266 3830 9290
WIND...HAIL 70MPH 0.75IN

$$

BRITT

791 
WWUS53 KLSX 180847
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
347 AM CDT SAT JUN 18 2011

MOC007-019-027-051-135-151-180915-
/O.CON.KLSX.SV.W.0335.000000T0000Z-110618T0915Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-AUDRAIN MO-
347 AM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
AUDRAIN...WESTERN OSAGE...MONITEAU...COLE...CALLAWAY AND BOONE
COUNTIES UNTIL 415 AM CDT...

AT 339 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM ARMSTRONG TO MIDWAY TO EASLEY TO 6 MILES NORTHWEST OF HIGH
POINT...MOVING EAST AT 55 MPH.

AT 333 AM CDT...A LARGE TREE WAS BLOWN DOWN AND A ROOF HAS BEEN 
PARTIALLY BLOWN OFF A METAL OUTBUILDING IN TIPTON WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  FULTON...JEFFERSON CITY...HOLTS SUMMIT...CENTRALIA...CENTERTOWN...
  RUSSELLVILLE...HICKORY HILL...ST. MARTINS...MURRY...HALLSVILLE...
  BRAZITO...NEW BLOOMFIELD...STURGEON...ST. THOMAS...LAKE MYKEE...
  WARDSVILLE...TAOS...AUXVASSE...WESTPHALIA AND ENON.

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 3869 9284 3869 9262 3891 9251 3897 9257
      3901 9257 3924 9244 3925 9232 3935 9230
      3934 9199 3899 9183 3855 9183 3829 9207
      3829 9219 3833 9220 3832 9226 3834 9229
      3833 9240 3842 9241 3843 9263 3860 9285
TIME...MOT...LOC 0845Z 267DEG 48KT 3928 9266 3897 9234
          3877 9225 3856 9254
WIND...HAIL 60MPH <.75IN

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:00 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Cole, Gasconade, Montgomery, Osage	45 min
Jun 18, 4:30 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 4 more	60 min
Jun 18, 4:56 AM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	49 min
Jun 18, 5:07 AM CDT	Tornado Warning	LSX	Lincoln, Montgomery, Pike	38 min
Jun 18, 5:10 AM CDT	Severe Thunderstorm Warning	LSX	Marion, Pike, Ralls	65 min
Jun 18, 5:18 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Lincoln, Pike, Saint Charles, Saint Louis and 2 more	57 min
Jun 18, 5:30 AM CDT	Tornado Warning	LSX	Lincoln, Pike, Saint Charles	19 min
Jun 18, 5:50 AM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis, City of Saint Louis	3 hr
Jun 18, 6:09 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	51 min
Jun 18, 7:28 AM CDT	Severe Thunderstorm Warning	LSX	Madison	16 min
Jun 18, 3:57 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 17 more	15 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.