Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 484, NWS St. Louis, MO

August 7, 20115 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 7, 2011, 5:13 PM CDT for 5 counties in Missouri. It was in force for 47 min. 9 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: Aug 7, 2011, 5:13 PM CDT (22:13 UTC)
Expired: Aug 7, 2011, 6:00 PM CDT
In force: 47 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The St Louis radar (KLSX), 134 km from the middle of the area, began a volume at 22:15 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
Aug 7, 5:15 PM CDT	TSTM WND GST 45	1 E Columbia, MO	40-45 ESTIMATED WIND GUSTS...NO DAMAGE
Aug 7, 5:18 PM CDT	TSTM WND GST 51	4 Nne Ashland, MO
Aug 7, 5:22 PM CDT	TSTM WND GST 62	4 Nne Ashland, MO
Aug 7, 5:24 PM CDT	TSTM WND GST 53	2 Ne Jefferson City, MO
Aug 7, 5:25 PM CDT	TSTM WND DMG	Jefferson City, MO	TREES AND POWER LINES REPORTED DOWN IN JEFFERSON CITY AND ELSEWHERE NI RURAL COLE COUNTY.
Aug 7, 5:30 PM CDT	TSTM WND GST 40	Taos, MO	WINDS REPORTED AT 40 MPH OR HIGHER.
Aug 7, 5:36 PM CDT	TSTM WND GST 63	New Bloomfield, MO	WIND GUST MEASURED BY HAND HELD ANEMOMETER...LARGE TREES DOWN.
Aug 7, 5:45 PM CDT	TSTM WND GST 50	Linn, MO	ESTIMATED WIND GUST WITH THE GUST FRONT...NO DAMAGE.
Aug 7, 5:47 PM CDT	TSTM WND GST 55	Jefferson City, MO	SMALL TO MEDIUM TREE BRANCHES DOWN AND HOME TRASH CANS BLOWN ABOUT IN PARTS OF THE CITY

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
Aug 7, 3:29 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.2 hours before the alert went out and 229 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: 1116 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 1673 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

714 
WUUS53 KLSX 072213
SVRLSX
MOC019-027-051-135-151-072300-
/O.NEW.KLSX.SV.W.0484.110807T2213Z-110807T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
513 PM CDT SUN AUG 7 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 510 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE     
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS       
  WERE LOCATED ALONG A LINE EXTENDING FROM ROCHEPORT TO              
  CALIFORNIA...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  COLUMBIA...ASHLAND...JEFFERSON CITY...HOLTS SUMMIT...FULTON...
  LINN...HICKORY HILL...BRAZITO...WARDSVILLE...LAKE MYKEE...NEW
  BLOOMFIELD...TAOS...ST. THOMAS...WESTPHALIA...RICH FOUNTAIN...
  FREEBURG...CHAMOIS...ELSTON...EUGENE AND GUTHRIE.

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.

WIND DAMAGE WITH THESE STORMS WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3869 9264 3869 9262 3903 9244 3896 9178
      3882 9169 3870 9164 3847 9165 3830 9177
      3828 9188 3829 9220 3833 9220 3832 9226
      3834 9229 3833 9240 3842 9241 3843 9260
      3851 9274
TIME...MOT...LOC 2212Z 287DEG 38KT 3900 9238 3882 9228
          3857 9234 3843 9246
WIND...HAIL 60MPH 1.00IN

$$

CVKING

2 follow-up statements

271 
WWUS53 KLSX 072228
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
528 PM CDT SUN AUG 7 2011

MOC019-027-051-135-151-072300-
/O.CON.KLSX.SV.W.0484.000000T0000Z-110807T2300Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-
528 PM CDT SUN AUG 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OSAGE...
EASTERN MONITEAU...COLE...CALLAWAY AND SOUTHERN BOONE COUNTIES UNTIL
600 PM CDT...

AT 522 PM 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 COLUMBIA TO 6 MILES NORTHWEST OF NEW BLOOMFIELD TO JEFFERSON
CITY TO HICKORY HILL...MOVING EAST AT 45 MPH. PENNY SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.

IN ADDITION...AT 505 PM WIND DAMAGE WAS REPORTED IN CALIFORNIA WITH 
THESE STORMS. POWER LINES WERE BLOWN DOWN BY WINDS OF 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  FULTON...LINN...LAKE MYKEE...NEW BLOOMFIELD...TAOS...ST. THOMAS...
  WESTPHALIA...RICH FOUNTAIN...FREEBURG...CHAMOIS...CARRINGTON...
  WAINWRIGHT...OSAGE BEND...SCHUBERT...OSAGE CITY...META...
  TEBBETTS...BONNOTS MILL...LOOSE CREEK AND KINGDOM 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.

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3903 9244 3896 9178 3882 9169 3870 9164
      3847 9165 3830 9177 3828 9195 3829 9220
      3833 9220 3832 9226 3834 9229 3833 9240
      3842 9241 3843 9260
TIME...MOT...LOC 2226Z 287DEG 38KT 3896 9220 3878 9210
          3853 9216 3839 9228
WIND...HAIL 60MPH 0.75IN

$$

CVKING

014 
WWUS53 KLSX 072242
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
542 PM CDT SUN AUG 7 2011

MOC135-072252-
/O.CAN.KLSX.SV.W.0484.000000T0000Z-110807T2300Z/
MONITEAU MO-
542 PM CDT SUN AUG 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MONITEAU COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 3842 9242 3879 9223 3870 9164 3847 9165
      3830 9177 3828 9195 3829 9220 3833 9220
      3832 9226 3834 9229 3833 9240 3842 9241
TIME...MOT...LOC 2242Z 287DEG 38KT 3874 9195 3850 9198
          3830 9213

$$

MOC019-027-051-151-072300-
/O.CON.KLSX.SV.W.0484.000000T0000Z-110807T2300Z/
BOONE MO-CALLAWAY MO-COLE MO-OSAGE MO-
542 PM CDT SUN AUG 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OSAGE...
COLE...SOUTHERN CALLAWAY AND SOUTH CENTRAL BOONE COUNTIES UNTIL 600
PM CDT...

AT 537 PM 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 5 MILES NORTHEAST OF NEW BLOOMFIELD TO TAOS TO ST. THOMAS...
MOVING EAST AT 45 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  LINN...WESTPHALIA...RICH FOUNTAIN...FREEBURG...CHAMOIS...LOOSE
  CREEK...KOELTZTOWN...MOKANE...FRANKENSTEIN...ARGYLE...STEEDMAN AND
  PORTLAND.

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.

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3842 9242 3879 9223 3870 9164 3847 9165
      3830 9177 3828 9195 3829 9220 3833 9220
      3832 9226 3834 9229 3833 9240 3842 9241
TIME...MOT...LOC 2242Z 287DEG 38KT 3874 9195 3850 9198
          3830 9213
WIND...HAIL 60MPH 0.75IN

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 10:23 PM CDT	Severe Thunderstorm Warning	LSX	Madison	52 min
Aug 7, 3:35 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	25 min
Aug 7, 4:37 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	38 min
Aug 7, 5:58 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	30 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.