Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 186, NWS St. Louis, MO

July 2, 2012Lincoln County, Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 2, 2012, 2:34 PM CDT for Lincoln County, Saint Charles County, Missouri. It was in force for 26 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 2, 2012, 2:34 PM CDT (19:34 UTC)
Expired
Jul 2, 2012, 3:00 PM CDT
In force
26 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Lincoln County, MO, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 19 km from the middle of the area, began a volume at 19:35 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

Lincoln, IL (KILX), launched 12:00Z, 7.6 hours before the alert went out and 230 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, Lincoln, IL at 12:00Z on 2012-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2475 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, Lincoln, IL at 12:00Z on 2012-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
2475 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1566 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
47 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.

751 
WUUS53 KLSX 021934
SVRLSX
MOC113-183-022000-
/O.NEW.KLSX.SV.W.0186.120702T1934Z-120702T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
234 PM CDT MON JUL 2 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 300 PM CDT

* AT 231 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LAKE ST.
  LOUIS...AND MOVING NORTHEAST AT 10 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...
  ST. PAUL AND OLD MONROE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3893 9067 3890 9063 3889 9063 3887 9059
      3870 9073 3878 9093 3895 9083
TIME...MOT...LOC 1934Z 208DEG 8KT 3882 9077

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

$$

GOSSELIN
1 follow-up statement
495 
WWUS53 KLSX 021956
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
256 PM CDT MON JUL 2 2012

MOC113-183-022006-
/O.EXP.KLSX.SV.W.0186.000000T0000Z-120702T2000Z/
LINCOLN MO-ST. CHARLES MO-
256 PM CDT MON JUL 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. CHARLES AND
SOUTHEASTERN LINCOLN COUNTIES WILL EXPIRE AT 300 PM CDT...

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

LAT...LON 3893 9067 3890 9063 3889 9063 3887 9059
      3870 9073 3878 9093 3895 9083
TIME...MOT...LOC 1956Z 208DEG 8KT 3886 9074

$$

GOSSELIN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 2:38 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren37 min
Jul 2, 2:39 PM CDTSevere Thunderstorm WarningLSXMontgomery36 min
Jul 2, 3:40 PM CDTSevere Thunderstorm WarningLSXGasconade21 min
Jul 2, 3:59 PM CDTHeat AdvisoryLSXKnox, Lewis, Marion, Monroe, Ralls, Shelby5 days
Jul 2, 6:39 PM CDTSevere Thunderstorm WarningLSXMarion, Shelby51 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.