Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 105, NWS St. Louis, MO

April 28, 2012Callaway County, Montgomery County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 28, 2012, 1:14 PM CDT for Callaway County, Montgomery County, Missouri. It was in force for 46 min. 4 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: Apr 28, 2012, 1:14 PM CDT (18:14 UTC)
Expired: Apr 28, 2012, 2:00 PM CDT
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Callaway County, MO, Montgomery County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 18:13 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
Apr 28, 1:18 PM CDT	HAIL 1	3 E Fulton, MO
Apr 28, 1:30 PM CDT	HAIL 0.38	Wellsville, MO
Apr 28, 1:40 PM CDT	HAIL 0.75	4 Sw Middletown, MO
Apr 28, 1:45 PM CDT	HAIL 0.5	Danville, MO

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, 6.2 hours before the alert went out and 293 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: 1019 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 681 m²/s²
0-3 km storm-relative helicity: 811 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

901 
WUUS53 KLSX 281814
SVRLSX
MOC027-139-281900-
/O.NEW.KLSX.SV.W.0105.120428T1814Z-120428T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
114 PM CDT SAT APR 28 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 200 PM CDT

* AT 108 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR FULTON...AND
  MOVING NORTHEAST 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...
  MONTGOMERY CITY...WELLSVILLE...WILLIAMSBURG...SHAMROCK...MINEOLA...
  NEW FLORENCE...BUELL...KINGDOM CITY AND DANVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3906 9172 3906 9163 3910 9163 3915 9150
      3914 9149 3890 9135 3871 9200 3891 9211
TIME...MOT...LOC 1814Z 246DEG 26KT 3883 9193

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

$$

BYRD

2 follow-up statements

238 
WWUS53 KLSX 281833
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
133 PM CDT SAT APR 28 2012

MOC027-139-281900-
/O.CON.KLSX.SV.W.0105.000000T0000Z-120428T1900Z/
CALLAWAY MO-MONTGOMERY MO-
133 PM CDT SAT APR 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MONTGOMERY AND
NORTHEASTERN CALLAWAY COUNTIES UNTIL 200 PM CDT...

AT 128 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
OF WILLIAMSBURG...AND MOVING NORTHEAST AT 30 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS. ONE INCH HAIL WAS REPORTED
         3 MILES EAST OF FULTON AT 118 PM.

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

LOCATIONS IMPACTED INCLUDE...
MONTGOMERY CITY...WELLSVILLE...WILLIAMSBURG...SHAMROCK...MINEOLA...
NEW FLORENCE...BUELL AND DANVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3906 9172 3906 9163 3910 9163 3915 9151
      3915 9150 3890 9135 3877 9179 3899 9190
TIME...MOT...LOC 1832Z 246DEG 26KT 3888 9178

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

$$

BYRD

660 
WWUS53 KLSX 281900
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
200 PM CDT SAT APR 28 2012

MOC027-139-281909-
/O.EXP.KLSX.SV.W.0105.000000T0000Z-120428T1900Z/
CALLAWAY MO-MONTGOMERY MO-
200 PM CDT SAT APR 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MONTGOMERY AND 
NORTHEASTERN CALLAWAY COUNTIES WILL EXPIRE AT 200 PM CDT...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 7 PM.

LAT...LON 3906 9172 3906 9163 3910 9163 3915 9151
      3915 9150 3890 9135 3877 9179 3899 9190
TIME...MOT...LOC 1859Z 246DEG 26KT 3896 9155

$$

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 1:50 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	40 min
Apr 28, 2:26 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	49 min
Apr 28, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	40 min
Apr 28, 3:45 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	45 min
Apr 28, 4:12 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	38 min
Apr 28, 4:49 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	41 min
Apr 28, 4:55 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	50 min
Apr 28, 5:19 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	41 min
Apr 28, 5:27 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Jefferson, Saint Francois, Washington	48 min
Apr 28, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	40 min
Apr 28, 6:01 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	29 min
Apr 28, 6:10 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	34 min
Apr 28, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.