Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 287, NWS St. Louis, MO

September 7, 2012Cole County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 7, 2012, 4:50 PM CDT for Cole County, Osage County, Missouri. It was in force for 40 min. 2 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 7, 2012, 4:50 PM CDT (21:50 UTC)
Expired: Sep 7, 2012, 5:30 PM CDT
In force: 40 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cole County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 21:52 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 7, 4:56 PM CDT	HAIL 0.5	Meta, MO	TIME ESTIMATED FROM RADAR
Sep 7, 5:26 PM CDT	TSTM WND DMG	7 Se Rich Fountain, MO	TREE BLOWN DOWN ON A HOUSE NEAR INTERSECTION OF HIGHWAY 89 AND HIGHWAY Y. ALSO NUMEROUS TREE LIMBS BLOWN DOWN.

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 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 221 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: 1095 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

496 
WUUS53 KLSX 072150
SVRLSX
MOC051-151-072230-
/O.NEW.KLSX.SV.W.0287.120907T2150Z-120907T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
450 PM CDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 530 PM CDT

* AT 448 PM CDT...A CLUSTER OF SEVERE THUNDERSTORMS EXTEND FROM NEAR
  JEFFERSON CITY TO NEAR ST. THOMAS...AND MOVING EAST AT 30 MPH.

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

  SOURCE...TRAINED WEATHER SPOTTERS REPORTED QUARTER SIZED HAIL IN 
  HICKORY HILL...AND 50 TO 55 MPH HAVE BEEN REPORTED IN JEFFERSON
  CITY.

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

* LOCATIONS IMPACTED INCLUDE...
  LINN...ST. THOMAS...WARDSVILLE...TAOS...WESTPHALIA...FREEBURG...
  RICH FOUNTAIN...META...OSAGE BEND...KOELTZTOWN...ARGYLE...LOOSE
  CREEK...BONNOTS MILL AND FRANKENSTEIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3856 9235 3850 9203 3858 9199 3858 9174
      3829 9177 3828 9217 3829 9220 3833 9220
      3832 9226 3834 9229 3833 9233 3834 9240
TIME...MOT...LOC 2149Z 266DEG 25KT 3847 9227

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

$$

TRUETT

1 follow-up statement

611 
WWUS53 KLSX 072209
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
509 PM CDT FRI SEP 7 2012

MOC051-072218-
/O.CAN.KLSX.SV.W.0287.000000T0000Z-120907T2230Z/
COLE MO-
509 PM CDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN COLE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3837 9219 3838 9214 3841 9211 3844 9216
      3847 9217 3848 9215 3846 9213 3847 9202
      3849 9201 3851 9202 3858 9199 3858 9174
      3829 9177 3829 9220
TIME...MOT...LOC 2208Z 282DEG 33KT 3841 9203

$$

MOC151-072230-
/O.CON.KLSX.SV.W.0287.000000T0000Z-120907T2230Z/
OSAGE MO-
509 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR OSAGE COUNTY
UNTIL 530 PM CDT...

AT 505 PM CDT...A CLUSTER OF SEVERE THUNDERSTORM STRETCHED FROM NEAR 
TAOS TO NEAR KOELTZTOWN...AND MOVING EAST AT 40 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS.

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

LOCATIONS IMPACTED INCLUDE...
LINN...WESTPHALIA...FREEBURG...RICH FOUNTAIN...BONNOTS MILL...
ARGYLE...LOOSE CREEK AND FRANKENSTEIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3837 9219 3838 9214 3841 9211 3844 9216
      3847 9217 3848 9215 3846 9213 3847 9202
      3849 9201 3851 9202 3858 9199 3858 9174
      3829 9177 3829 9220
TIME...MOT...LOC 2208Z 282DEG 33KT 3841 9203

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

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 3:02 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	43 min
Sep 7, 3:18 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	42 min
Sep 7, 3:33 PM CDT	Severe Thunderstorm Warning	LSX	Boone	57 min
Sep 7, 3:36 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	54 min
Sep 7, 3:51 PM CDT	Severe Thunderstorm Warning	LSX	Washington	39 min
Sep 7, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Washington	35 min
Sep 7, 4:13 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	62 min
Sep 7, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	42 min
Sep 7, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron	51 min
Sep 7, 4:46 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	44 min
Sep 7, 5:00 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Sep 7, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	42 min
Sep 7, 5:13 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	32 min
Sep 7, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	30 min
Sep 7, 5:22 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	23 min
Sep 7, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	31 min
Sep 7, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	35 min
Sep 7, 5:49 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	41 min
Sep 7, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	40 min
Sep 7, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	30 min
Sep 7, 6:03 PM CDT	Areal Flood Advisory	LSX	Iron, Reynolds	6 hr
Sep 7, 6:22 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	53 min
Sep 7, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds	49 min

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.