Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 198, NWS St. Louis, MO

July 7, 2012Saint Francois County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 2012, 6:27 PM CDT for Saint Francois County, Missouri. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 7, 2012, 6:27 PM CDT (23:27 UTC)
Expired
Jul 7, 2012, 7:00 PM CDT
In force
33 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Saint Francois County, MO

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 23:30 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.5 hours before the alert went out and 298 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 2012-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1058 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 2012-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939Sfc1 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
1058 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
2009 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

479 
WUUS53 KLSX 072327
SVRLSX
MOC187-080000-
/O.NEW.KLSX.SV.W.0198.120707T2327Z-120708T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
627 PM CDT SAT JUL 7 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 700 PM CDT

* AT 621 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BISMARCK...
  AND MOVING WEST AT 10 MPH.

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

  SOURCE...TRAINED WEATHER SPOTTERS RECENTLY REPORTED 65 MPH         
           WINDS...TREE DAMAGE...AND QUARTER SIZE HAIL IN DOE RUN.

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

* LOCATIONS IMPACTED INCLUDE...
  BISMARCK AND IRON MOUNTAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3766 9065 3774 9065 3775 9064 3778 9064
      3782 9062 3778 9045 3766 9051
TIME...MOT...LOC 2326Z 104DEG 10KT 3774 9061

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

$$

KANOFSKY
1 follow-up statement
287 
WWUS53 KLSX 072351
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
651 PM CDT SAT JUL 7 2012

MOC187-080000-
/O.EXP.KLSX.SV.W.0198.000000T0000Z-120708T0000Z/
ST. FRANCOIS MO-
651 PM CDT SAT JUL 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR ST. FRANCOIS COUNTY WILL
EXPIRE AT 700 PM CDT...

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

LAT...LON 3766 9065 3774 9065 3775 9064 3778 9064
      3782 9062 3778 9045 3766 9051
TIME...MOT...LOC 2350Z 104DEG 10KT 3776 9069

$$

KANOFSKY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 5:01 PM CDTSevere Thunderstorm WarningLSXFranklin13 min
Jul 7, 5:29 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren29 min
Jul 7, 5:49 PM CDTSevere Thunderstorm WarningLSXSaint Francois41 min
Jul 7, 6:19 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Francois, Washington41 min
Jul 7, 6:46 PM CDTSevere Thunderstorm WarningLSXSaint Louis44 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.