Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 291, NWS St. Louis, MO

September 7, 2012Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 7, 2012, 5:16 PM CDT for Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 30 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, 5:16 PM CDT (22:16 UTC)
Expired: Sep 7, 2012, 5:46 PM CDT
In force: 30 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 113 km from the middle of the area, began a volume at 22:18 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, 5:30 PM CDT	TSTM WND DMG	1 Ene Park Hills, MO	NUMEROUS TREES TWO FEET IN DIAMETER OR GREATER DOWN. AT LEAST ONE HOUSE ROOF DAMAGED. TIME ESTIMATED.
Sep 7, 5:30 PM CDT	TSTM WND DMG	2 E Bismarck, MO	DELAYED REPORT. ROOF DAMAGE TO A FEW STRUCTURES. HEALTHY 18 INCH DIAMETER TREES SNAPPED IN HALF. TIME ESTIMATED FROM RADAR.

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

Lincoln, IL (KILX), launched 12:00Z, 10.3 hours before the alert went out and 303 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: 367 J/kg
Mixed-layer CIN: -412 J/kg
Mixed-layer LCL: 1436 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

036 
WUUS53 KLSX 072216
SVRLSX
MOC186-187-072300-
/O.NEW.KLSX.SV.W.0291.120907T2216Z-120907T2300Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 600 PM CDT

* AT 513 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  FARMINGTON...AND MOVING EAST AT 30 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...
  FARMINGTON...KNOB LICK...COFFMAN...WOMAC...LIBERTYVILLE...RIVER AUX
  VASES AND MINNITH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3765 9063 3789 9059 3787 8994 3786 8994
      3782 8999 3767 9010 3764 9014 3764 9015
TIME...MOT...LOC 2217Z 281DEG 25KT 3778 9046

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

$$

GLASS

3 follow-up statements

095 
WWUS53 KLSX 072230 RRA
SVSLSX

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

MOC186-187-072300-
/O.CON.KLSX.SV.W.0291.000000T0000Z-120907T2300Z/
STE. GENEVIEVE MO-ST. FRANCOIS MO-
530 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ST. FRANCOIS
AND SOUTHERN STE. GENEVIEVE COUNTIES UNTIL 600 PM CDT...

AT 526 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR FARMINGTON...
AND MOVING EAST AT 30 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...
COFFMAN...WOMAC...LIBERTYVILLE...RIVER AUX VASES AND MINNITH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3765 9063 3789 9059 3787 8994 3782 8999
      3771 9007 3764 9014
TIME...MOT...LOC 2231Z 281DEG 25KT 3774 9035

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

$$

GLASS

634 
WWUS53 KLSX 072240
SVSLSX

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

MOC186-187-072300-
/O.CON.KLSX.SV.W.0291.000000T0000Z-120907T2300Z/
STE. GENEVIEVE MO-ST. FRANCOIS MO-
540 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ST. FRANCOIS
AND SOUTHERN STE. GENEVIEVE COUNTIES UNTIL 600 PM CDT...

AT 539 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES EAST OF
FARMINGTON...AND MOVING EAST AT 20 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...
COFFMAN...WOMAC...LIBERTYVILLE...MINNITH AND RIVER AUX VASES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3765 9048 3788 9046 3787 8994 3782 8999
      3774 9005 3764 9014
TIME...MOT...LOC 2240Z 272DEG 18KT 3775 9032

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

$$

GLASS

755 
WWUS53 KLSX 072246
SVSLSX

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

MOC186-187-072256-
/O.CAN.KLSX.SV.W.0291.000000T0000Z-120907T2300Z/
STE. GENEVIEVE MO-ST. FRANCOIS MO-
546 PM CDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR ST. FRANCOIS AND SOUTHERN STE.
GENEVIEVE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM.

LAT...LON 3765 9048 3788 9046 3787 8994 3782 8999
      3774 9005 3764 9014
TIME...MOT...LOC 2246Z 272DEG 18KT 3775 9028

$$

GLASS

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, 5:22 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.