Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 265, NWS St. Louis, MO

September 6, 2012Crawford County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 6, 2012, 2:31 PM CDT for Crawford County, Missouri. It was in force for 44 min. 1 report 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, 2:31 PM CDT (19:31 UTC)
Expired
Sep 6, 2012, 3:15 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Crawford County, MO

The radar

The St Louis radar (KLSX), 113 km from the middle of the area, began a volume at 19:31 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, 2:35 PM CDTHAIL 0.886 Sw Steelville, 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.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.5 hours before the alert went out and 243 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.

508 
WUUS53 KLSX 061931
SVRLSX
MOC055-062015-
/O.NEW.KLSX.SV.W.0265.120906T1931Z-120906T2015Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 315 PM CDT

* AT 227 PM CDT...A CLUSTER OF SEVERE THUNDERSTORMS WAS LOCATED 9 
  MILES WEST OF CHERRYVILLE...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...
  STEELVILLE...CHERRYVILLE...DILLARD AND DAVISVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3778 9131 3778 9151 3785 9152 3799 9153
      3799 9110 3774 9110 3774 9115 3770 9116
      3770 9130
TIME...MOT...LOC 1931Z 271DEG 28KT 3781 9140

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

$$

TILLY
2 follow-up statements
739 
WWUS53 KLSX 062002
SVSLSX

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

MOC055-062015-
/O.CON.KLSX.SV.W.0265.000000T0000Z-120906T2015Z/
CRAWFORD MO-
302 PM CDT THU SEP 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
CRAWFORD COUNTY UNTIL 315 PM CDT...

AT 257 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES WEST OF
CHERRYVILLE...AND MOVING EAST AT 15 MPH.

HAZARD...QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.

LOCATIONS IMPACTED INCLUDE...
STEELVILLE...CHERRYVILLE...DAVISVILLE AND DILLARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3778 9131 3778 9151 3785 9152 3799 9153
      3799 9110 3774 9110 3774 9115 3770 9116
      3770 9130
TIME...MOT...LOC 2002Z 268DEG 13KT 3784 9143

HAIL...1.00IN
WIND...<50 MPH

$$

TILLY
720 
WWUS53 KLSX 062018
SVSLSX

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

MOC055-062028-
/O.EXP.KLSX.SV.W.0265.000000T0000Z-120906T2015Z/
CRAWFORD MO-
318 PM CDT THU SEP 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CRAWFORD COUNTY HAS
EXPIRED...

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

HOWEVER...AN ADDITIONAL SEVERE THUNDERSTORM WARNING REMAINS IN 
EFFECT UNTIL 400 PM FOR NORTHERN PORTIONS OF CRAWFORD COUNTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM. 

LAT...LON 3778 9131 3778 9151 3785 9152 3799 9153
      3799 9110 3774 9110 3774 9115 3770 9116
      3770 9130
TIME...MOT...LOC 2002Z 272DEG 14KT 3785 9145

$$

TILLY

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, 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, 3:58 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds47 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.