Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 149, NWS St. Louis, MO

May 4, 2012Callaway County, Montgomery County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 4, 2012, 8:54 AM CDT for Callaway County, Montgomery County, Missouri. It was in force for 25 min. 3 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: May 4, 2012, 8:54 AM CDT (13:54 UTC)
Expired: May 4, 2012, 9:19 AM CDT
In force: 25 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Callaway County, MO, Montgomery County, MO

The radar

The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 13:54 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

Time	Report	Where	Remark
May 4, 8:59 AM CDT	HAIL 0.25	Williamsburg, MO
May 4, 9:10 AM CDT	HAIL 1	3 N Big Spring, MO	ESTIMATED LOCATION BASED ON A RELAYED VIEWER REPORT.
May 4, 9:19 AM CDT	HAIL 0.5	1 Ese Mineola, MO	PEA TO MARBLE SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.9 hours before the alert went out and 292 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1160 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 170 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.

259 
WUUS53 KLSX 041354
SVRLSX
MOC027-139-041430-
/O.NEW.KLSX.SV.W.0149.120504T1354Z-120504T1430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
854 AM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL CALLAWAY COUNTY IN CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 930 AM CDT

* AT 849 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  WILLIAMSBURG...AND MOVING EAST AT 40 MPH.

  HAZARD...QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

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

* LOCATIONS IMPACTED INCLUDE...
  MINEOLA...BIG SPRING...NEW FLORENCE...AMERICUS...DANVILLE AND
  MCKITTRICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3900 9181 3896 9140 3884 9141 3884 9142
      3874 9142 3872 9143 3878 9186
TIME...MOT...LOC 1354Z 280DEG 33KT 3889 9171

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

$$

CARNEY

1 follow-up statement

102 
WWUS53 KLSX 041419
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
919 AM CDT FRI MAY 4 2012

MOC027-139-041430-
/O.CAN.KLSX.SV.W.0149.000000T0000Z-120504T1430Z/
CALLAWAY MO-MONTGOMERY MO-
919 AM CDT FRI MAY 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR MONTGOMERY AND EAST CENTRAL
CALLAWAY COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THIS THUNDERSTORM.

LAT...LON 3900 9181 3896 9140 3884 9141 3884 9142
      3874 9142 3872 9143 3878 9186
TIME...MOT...LOC 1420Z 280DEG 33KT 3885 9141

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 8:07 PM CDT	River Flood Warning	LSX	Lewis	23 hr
May 4, 8:22 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery	38 min
May 4, 8:33 AM CDT	Severe Thunderstorm Warning	LSX	Callaway	27 min
May 4, 8:52 AM CDT	Areal Flood Advisory	LSX	Audrain	5 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.