Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 267, NWS St. Louis, MO

September 6, 2012Crawford County, Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 6, 2012, 3:15 PM CDT for Crawford County, Franklin County, Gasconade County, Missouri. It was in force for 45 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: Sep 6, 2012, 3:15 PM CDT (20:15 UTC)
Expired: Sep 6, 2012, 4:00 PM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 87 km from the middle of the area, began a volume at 20:15 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
Sep 6, 3:16 PM CDT	TSTM WND GST 50	1 N Owensville, MO
Sep 6, 3:17 PM CDT	HAIL 0.5	Rosebud, MO
Sep 6, 3:20 PM CDT	HAIL 0.88	3 Ese Owensville, MO	DIME TO NICKEL SIZE HAIL NEAR INTERSECTION OF HIGHWAY T AND V.
Sep 6, 3:29 PM CDT	TSTM WND DMG	2 E Japan, MO	TWO LARGE TREES DOWN NEAR INTERSECTION OF HIGHWAYS J AND H. TIME ESTIMATED FROM RADAR.
Sep 6, 3:30 PM CDT	TSTM WND DMG	2 S Rosebud, MO	TWELVE INCH TREE LIMB DOWN BLOCKIGN HIGHWAY T.
Sep 6, 3:33 PM CDT	TSTM WND DMG	Sullivan, MO	SEVERAL TREES UPROOTED ALONG AND SOUTH OF SERICE ROAD OF INTERSTATE 44.
Sep 6, 3:35 PM CDT	TSTM WND GST 50	3 Ese Owensville, MO	40-50 MPH WIND GUSTS WITH ONE INCH TREE LIMBS DOWN NEAR INTERSECTION OF HIGHWAYS T AND V.
Sep 6, 3:50 PM CDT	TSTM WND GST 61	1 Nne Sullivan, 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
Sep 6, 12:28 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.3 hours before the alert went out and 252 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: 841 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1845 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 32 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.

540 
WUUS53 KLSX 062015
SVRLSX
MOC055-071-073-062100-
/O.NEW.KLSX.SV.W.0267.120906T2015Z-120906T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
315 PM CDT THU SEP 6 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHWESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 400 PM CDT

* AT 310 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM MOUNT STERLING TO 11 MILES SOUTHEAST OF
  BLAND...AND MOVING EAST AT 40 MPH.

  HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
           DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  OWENSVILLE...CUBA...BOURBON...SULLIVAN...ROSEBUD...LEASBURG...
  GERALD...BEAUFORT...OAK HILL...JAPAN...ST. CLOUD...LESLIE AND NOSER
  MILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3846 9164 3844 9115 3799 9110 3800 9153
      3815 9153 3815 9162 3816 9163 3844 9165
TIME...MOT...LOC 2015Z 265DEG 36KT 3840 9157 3817 9148

HAIL...1.00IN
WIND...60 MPH

$$

TILLY

1 follow-up statement

956 
WWUS53 KLSX 062044
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
344 PM CDT THU SEP 6 2012

MOC073-062054-
/O.CAN.KLSX.SV.W.0267.000000T0000Z-120906T2100Z/
GASCONADE MO-
344 PM CDT THU SEP 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR GASCONADE COUNTY IS
CANCELLED...

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

GUSTY WINDS MAY STILL BE POSSIBLE WITH THESE STORMS. A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.

LAT...LON 3814 9136 3827 9137 3845 9136 3844 9115
      3811 9111
TIME...MOT...LOC 2044Z 261DEG 44KT 3847 9115 3829 9101

$$

MOC055-071-062100-
/O.CON.KLSX.SV.W.0267.000000T0000Z-120906T2100Z/
CRAWFORD MO-FRANKLIN MO-
344 PM CDT THU SEP 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
FRANKLIN AND NORTHEASTERN CRAWFORD COUNTIES UNTIL 400 PM CDT...

AT 343 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM BEAUFORT TO PARKWAY...AND MOVING EAST AT 50 MPH.

HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
         DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

LOCATIONS IMPACTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3814 9136 3827 9137 3845 9136 3844 9115
      3811 9111
TIME...MOT...LOC 2044Z 261DEG 44KT 3847 9115 3829 9101

HAIL...1.00IN
WIND...60 MPH

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 1:44 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	46 min
Sep 6, 2:28 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Osage	47 min
Sep 6, 2:31 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	44 min
Sep 6, 3:00 PM CDT	Flash Flood Warning	LSX	Crawford	5 hr
Sep 6, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	27 min
Sep 6, 3:31 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	44 min
Sep 6, 3:39 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	54 min
Sep 6, 3:58 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	47 min
Sep 6, 4:02 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren, Washington	43 min
Sep 6, 4:20 PM CDT	Severe Thunderstorm Warning	LSX	Madison	40 min
Sep 6, 4:38 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Louis	37 min
Sep 6, 5:18 PM CDT	Areal Flood Advisory	LSX	Madison, Saint Francois	3 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.