Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 270, NWS St. Louis, MO

September 6, 2012Iron County, Reynolds County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 6, 2012, 3:58 PM CDT for Iron County, Reynolds County, Missouri. It was in force for 47 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 6, 2012, 3:58 PM CDT (20:58 UTC)
Expired
Sep 6, 2012, 4:45 PM CDT
In force
47 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Iron County, MO, Reynolds County, MO

The radar

The St Louis radar (KLSX), 162 km from the middle of the area, began a volume at 21:01 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

TimeReportWhereRemark
Sep 6, 4:25 PM CDTTSTM WND DMGAnnapolis, MOTREE FELL ONTO HOUSE...TIME EST FROM RADAR
Sep 6, 4:35 PM CDTTSTM WND DMGIronton, MOSEVERAL REPORTS OF TREES DOWN BETWEEN IRONTON AND BELLEVIEW...TIME EST 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.

IssuedProductOfficeLasted
Sep 6, 12:28 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.0 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2012-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 841 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2012-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

604 
WUUS53 KLSX 062058
SVRLSX
MOC093-179-062145-
/O.NEW.KLSX.SV.W.0270.120906T2058Z-120906T2145Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  REYNOLDS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 445 PM CDT

* AT 356 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM OATES TO 10 MILES SOUTHWEST OF REYNOLDS TO
  BIRCH TREE...AND MOVING EAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
           BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  IRONTON...OATES...REYNOLDS...ELLINGTON...GARWOOD...GLOVER...
  ARCADIA...ANNAPOLIS...CORRIDON...BLACK...CENTERVILLE...REDFORD...
  LESTERVILLE...HOGAN...CHLORIDE...SABULA...VULCAN AND DES ARC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3705 9096 3709 9097 3710 9102 3716 9104
      3719 9110 3720 9109 3720 9112 3725 9113
      3726 9117 3741 9118 3742 9122 3750 9122
      3750 9130 3760 9130 3763 9054 3727 9055
      3726 9073 3717 9073 3713 9077 3705 9078
TIME...MOT...LOC 2058Z 288DEG 36KT 3754 9108 3728 9116
          3699 9141

HAIL...<.75IN
WIND...60 MPH

$$

GLASS
2 follow-up statements
856 
WWUS53 KLSX 062121
SVSLSX

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

MOC093-179-062145-
/O.CON.KLSX.SV.W.0270.000000T0000Z-120906T2145Z/
IRON MO-REYNOLDS MO-
421 PM CDT THU SEP 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR REYNOLDS AND
IRON COUNTIES UNTIL 445 PM CDT...

AT 420 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 9 MILES NORTHWEST OF GLOVER TO ELLINGTON TO 9
MILES SOUTHWEST OF VAN BUREN...AND MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
         BROKEN.

LOCATIONS IMPACTED INCLUDE...
IRONTON...GARWOOD...GLOVER...ARCADIA...ANNAPOLIS...REDFORD...
LESTERVILLE...HOGAN...CHLORIDE...SABULA...VULCAN AND DES ARC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3709 9097 3710 9102 3716 9104 3719 9110
      3720 9109 3720 9112 3725 9113 3726 9117
      3741 9114 3754 9102 3760 9100 3763 9054
      3727 9055 3726 9073 3717 9073 3713 9077
      3705 9078 3705 9096
TIME...MOT...LOC 2121Z 288DEG 36KT 3755 9082 3720 9098
          3692 9114

HAIL...<.75IN
WIND...60 MPH

$$

GLASS
020 
WWUS53 KLSX 062145
SVSLSX

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

MOC093-179-062155-
/O.EXP.KLSX.SV.W.0270.000000T0000Z-120906T2145Z/
IRON MO-REYNOLDS MO-
445 PM CDT THU SEP 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR REYNOLDS AND IRON COUNTIES HAS
EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.  HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THESE THUNDERSTORMS.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.

LAT...LON 3709 9097 3710 9102 3716 9104 3719 9110
      3720 9109 3720 9112 3725 9113 3726 9117
      3741 9114 3754 9102 3760 9100 3763 9054
      3727 9055 3726 9073 3717 9073 3713 9077
      3705 9078 3705 9096
TIME...MOT...LOC 2145Z 288DEG 36KT 3748 9053 3713 9069
          3685 9085

$$

GLASS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 1:44 PM CDTSevere Thunderstorm WarningLSXCole, Moniteau46 min
Sep 6, 2:28 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Osage47 min
Sep 6, 2:31 PM CDTSevere Thunderstorm WarningLSXCrawford44 min
Sep 6, 3:00 PM CDTFlash Flood WarningLSXCrawford5 hr
Sep 6, 3:13 PM CDTSevere Thunderstorm WarningLSXSaint Francois, Washington27 min
Sep 6, 3:15 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade45 min
Sep 6, 3:31 PM CDTSevere Thunderstorm WarningLSXIron, Washington44 min
Sep 6, 3:39 PM CDTSevere Thunderstorm WarningLSXFranklin54 min
Sep 6, 4:02 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis, Warren, Washington43 min
Sep 6, 4:20 PM CDTSevere Thunderstorm WarningLSXMadison40 min
Sep 6, 4:38 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve, Saint Louis37 min
Sep 6, 5:18 PM CDTAreal Flood AdvisoryLSXMadison, Saint Francois3 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012Every 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.