Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 190, NWS St. Louis, MO

July 2, 2012Gasconade County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 2, 2012, 3:40 PM CDT for Gasconade County, Missouri. It was in force for 21 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, 3:40 PM CDT (20:40 UTC)
Expired: Jul 2, 2012, 4:01 PM CDT
In force: 21 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Gasconade County, MO

The radar

The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 20:41 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, 8.7 hours before the alert went out and 272 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: 861 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1324 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -49 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.

796 
WUUS53 KLSX 022040
SVRLSX
MOC073-022115-
/O.NEW.KLSX.SV.W.0190.120702T2040Z-120702T2115Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 415 PM CDT

* AT 337 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTH OF
  MOUNT STERLING...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...
  BAY...SWISS AND GASCONADE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST
LOUIS.

&&

LAT...LON 3868 9156 3867 9155 3853 9139 3843 9161
      3852 9164 3862 9164
TIME...MOT...LOC 2040Z 232DEG 7KT 3856 9159

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

$$

GOSSELIN

1 follow-up statement

354 
WWUS53 KLSX 022101
SVSLSX

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

MOC073-022111-
/O.CAN.KLSX.SV.W.0190.000000T0000Z-120702T2115Z/
GASCONADE MO-
401 PM CDT MON JUL 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR GASCONADE COUNTY IS
CANCELLED...

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

LAT...LON 3868 9156 3867 9155 3853 9139 3843 9161
      3852 9164 3862 9164
TIME...MOT...LOC 2101Z 232DEG 7KT 3859 9155

$$

GOSSELIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 2:34 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles	26 min
Jul 2, 2:38 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	37 min
Jul 2, 2:39 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	36 min
Jul 2, 3:59 PM CDT	Heat Advisory	LSX	Knox, Lewis, Marion, Monroe, Ralls, Shelby	5 days
Jul 2, 6:39 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Shelby	51 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.