Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 294, NWS St. Louis, MO

September 7, 2012Franklin County, Gasconade County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 7, 2012, 5:25 PM CDT for Franklin County, Gasconade County, Osage County, Missouri. It was in force for 35 min. 4 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, 5:25 PM CDT (22:25 UTC)
Expired: Sep 7, 2012, 6:00 PM CDT
In force: 35 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Franklin County, MO, Gasconade County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 86 km from the middle of the area, began a volume at 22:26 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, 5:26 PM CDT	TSTM WND DMG	10 Se Rich Fountain, MO	SEVERAL LARGE TREES BLOWN DOWN ON HIGHWAY 89 NORTH OF BELLE.
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.
Sep 7, 5:35 PM CDT	TSTM WND GST 60	Bland, MO
Sep 7, 5:50 PM CDT	TSTM WND GST 50	7 Sw New Haven, 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 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.4 hours before the alert went out and 256 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.

389 
WUUS53 KLSX 072225
SVRLSX
MOC071-073-151-072300-
/O.NEW.KLSX.SV.W.0294.120907T2225Z-120907T2300Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  EASTERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 600 PM CDT

* AT 522 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR RICH
  FOUNTAIN...AND MOVING EAST AT 45 MPH.

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

  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...SULLIVAN...BLAND...MOUNT STERLING...SWISS...DRAKE...
  ROSEBUD...GERALD...BEAUFORT...CANAAN...BAY...JAPAN...LESLIE...NOSER
  MILL...LYON AND STANTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3857 9187 3860 9107 3820 9110 3821 9165
      3828 9165 3829 9187
TIME...MOT...LOC 2226Z 269DEG 39KT 3842 9175

HAIL...0.88IN
WIND...60 MPH

$$

TRUETT

1 follow-up statement

593 
WWUS53 KLSX 072244
SVSLSX

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

MOC151-072253-
/O.CAN.KLSX.SV.W.0294.000000T0000Z-120907T2300Z/
OSAGE MO-
544 PM CDT FRI SEP 7 2012

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

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

LAT...LON 3858 9164 3860 9107 3820 9110 3821 9137
      3821 9165
TIME...MOT...LOC 2243Z 276DEG 43KT 3835 9151

$$

MOC071-073-072300-
/O.CON.KLSX.SV.W.0294.000000T0000Z-120907T2300Z/
FRANKLIN MO-GASCONADE MO-
544 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GASCONADE AND
WESTERN FRANKLIN COUNTIES UNTIL 600 PM CDT...

AT 539 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OWENSVILLE...
AND MOVING EAST AT 50 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS REPORTED TREE DAMAGE IN SOUTHEAST
OSAGE COUNTY WHEN THE STORM PASSED AROUND 525 PM.

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

LOCATIONS IMPACTED INCLUDE...
SULLIVAN...DRAKE...ROSEBUD...GERALD...BEAUFORT...JAPAN...NOSER
MILL...LESLIE...STANTON AND LYON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3858 9164 3860 9107 3820 9110 3821 9137
      3821 9165
TIME...MOT...LOC 2243Z 276DEG 43KT 3835 9151

HAIL...0.88IN
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, 4:50 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	40 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, 5:49 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.