Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 276, NWS St. Louis, MO

September 7, 2012Boone County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 7, 2012, 3:33 PM CDT for Boone County, Missouri. It was in force for 57 min. 20 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: Sep 7, 2012, 3:33 PM CDT (20:33 UTC)
Expired: Sep 7, 2012, 4:30 PM CDT
In force: 57 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Boone County, MO

The radar

The St Louis radar (KLSX), 141 km from the middle of the area, began a volume at 20:34 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
Sep 7, 3:40 PM CDT	HAIL 0.88	8 Nne Rocheport, MO
Sep 7, 3:45 PM CDT	HAIL 1	4 Ne Rocheport, MO	NEAR INTERSECTION OF HWY J AND ROCHEPORT GRAVEL RD
Sep 7, 3:47 PM CDT	HAIL 1	Midway, MO	HAIL 2 INCHES DEEP ON BACK DECK
Sep 7, 3:50 PM CDT	HAIL 1.5	3 E Columbia, MO
Sep 7, 3:52 PM CDT	HAIL 1.75	3 Ese Midway, MO
Sep 7, 3:54 PM CDT	HAIL 1.75	4 W Columbia, MO
Sep 7, 3:55 PM CDT	HAIL 1.25	1 W Columbia, MO
Sep 7, 3:55 PM CDT	HAIL 1.5	Columbia, MO	ON I70 AT MM 124
Sep 7, 3:55 PM CDT	HAIL 1.75	Columbia, MO	HAIL STRIPPED VITAL GREEN LEAVES AND BRANCHES FROM SOME TREES NEAR MILE MARKER 123 ON I70
Sep 7, 3:56 PM CDT	HAIL 1	3 Wnw Columbia, MO	AT INTERSECTION OF STADIUM BLVD AND I-70.
Sep 7, 3:57 PM CDT	HAIL 2	Columbia, MO	NW PORTION OF CITY
Sep 7, 3:59 PM CDT	HAIL 2.5	Columbia, MO
Sep 7, 4:00 PM CDT	HAIL 1.75	Columbia, MO	NEAR INTERSECTION OF PROVIDENCE AND WALNUT
Sep 7, 4:01 PM CDT	HAIL 0.75	7 Ese Columbia, MO	ON ROUTE WW EAST OF COLUMBIA.
Sep 7, 4:03 PM CDT	HAIL 2.75	Columbia, MO	REPORT OF BASEBALL SIZE HAIL ON NW SIDE OF COLUMBIA.
Sep 7, 4:05 PM CDT	HAIL 1.5	Columbia, MO	LOCATION IS SOUTH OF I-70 AMD ABOUT 1 MILE WEST OF THE STADIUM BLVD EXIT
Sep 7, 4:05 PM CDT	HAIL 2	Columbia, MO	HAIL UP TO 2 INCHES IN DIAMETER. MEASURED WITH A MEASURING TAPE.
Sep 7, 4:06 PM CDT	HAIL 1	Columbia, MO	NORTH SIDE OF TOWN
Sep 7, 4:10 PM CDT	HAIL 1.5	3 E Columbia, MO	ON ROUTE WW EAST OF COLUMBIA.
Sep 7, 4:10 PM CDT	HAIL 1.75	Columbia, MO	FALLING HAIL BROKE OUTDOOR LIGHTING GLASS. HAIL FELL FOR SEVERAL MINUTES.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.6 hours before the alert went out and 268 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: 1095 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

974 
WUUS53 KLSX 072033
SVRLSX
MOC019-072130-
/O.NEW.KLSX.SV.W.0276.120907T2033Z-120907T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
333 PM CDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BOONE COUNTY IN CENTRAL MISSOURI...

* UNTIL 430 PM CDT

* AT 330 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES EAST OF
  NEW FRANKLIN...AND MOVING EAST AT 25 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...
  COLUMBIA...ROCHEPORT...MIDWAY...HALLSVILLE AND MURRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3901 9257 3913 9250 3911 9211 3907 9211
      3906 9213 3903 9214 3902 9213 3899 9213
      3890 9217 3888 9215 3887 9216 3886 9215
      3892 9251 3897 9257
TIME...MOT...LOC 2033Z 278DEG 22KT 3904 9262

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

$$

TRUETT

6 follow-up statements

154 
WWUS53 KLSX 072047
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
347 PM CDT FRI SEP 7 2012

MOC019-072130-
/O.CON.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
347 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BOONE
COUNTY UNTIL 430 PM CDT...

AT 343 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ROCHEPORT...
AND MOVING EAST 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...
COLUMBIA...MIDWAY...HALLSVILLE AND MURRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3901 9257 3913 9250 3911 9211 3907 9211
      3906 9213 3903 9214 3902 9213 3899 9213
      3890 9217 3888 9215 3887 9216 3886 9215
      3892 9251 3897 9257
TIME...MOT...LOC 2048Z 277DEG 27KT 3901 9247

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

$$

TRUETT

294 
WWUS53 KLSX 072052
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
352 PM CDT FRI SEP 7 2012

MOC019-072130-
/O.CON.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
352 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BOONE
COUNTY UNTIL 430 PM CDT...

AT 348 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MIDWAY...AND
MOVING EAST AT 30 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS AT MIDWAY REPORTED 1 INCH DIAMETER 
HAIL.   

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

LOCATIONS IMPACTED INCLUDE...
COLUMBIA...HALLSVILLE AND MURRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3901 9257 3913 9250 3911 9211 3907 9211
      3906 9213 3903 9214 3902 9213 3899 9213
      3890 9217 3888 9215 3887 9216 3886 9215
      3892 9251 3897 9257
TIME...MOT...LOC 2052Z 282DEG 28KT 3899 9243

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

$$

TRUETT

689 
WWUS53 KLSX 072056
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
356 PM CDT FRI SEP 7 2012

MOC019-072130-
/O.CON.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
356 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BOONE
COUNTY UNTIL 430 PM CDT...

AT 353 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MIDWAY...AND
MOVING EAST AT 30 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZED HAIL ON 
WEST SIDE OF COLUMBIA.    

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

LOCATIONS IMPACTED INCLUDE...
COLUMBIA...HALLSVILLE AND MURRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3901 9257 3913 9250 3911 9211 3907 9211
      3906 9213 3903 9214 3902 9213 3899 9213
      3890 9217 3888 9215 3887 9216 3886 9215
      3892 9251 3897 9257
TIME...MOT...LOC 2056Z 282DEG 28KT 3898 9239

HAIL...1.75IN
WIND...60 MPH

$$

TRUETT

407 
WWUS53 KLSX 072102
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
402 PM CDT FRI SEP 7 2012

MOC019-072130-
/O.CON.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
402 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BOONE
COUNTY UNTIL 430 PM CDT...

AT 357 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COLUMBIA...AND
MOVING EAST AT 30 MPH.

HAZARD...TENNIS BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS REPORTED LEMON-SIZED HAIL IN 
COLUMBIA.   

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

LOCATIONS IMPACTED INCLUDE...
HALLSVILLE AND MURRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3901 9257 3913 9250 3911 9211 3907 9211
      3906 9213 3903 9214 3902 9213 3899 9213
      3890 9217 3888 9215 3887 9216 3886 9215
      3892 9251 3897 9257
TIME...MOT...LOC 2102Z 282DEG 28KT 3897 9233

HAIL...2.50IN
WIND...60 MPH

$$

TRUETT

407 
WWUS53 KLSX 072111
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
411 PM CDT FRI SEP 7 2012

MOC019-072130-
/O.CON.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
411 PM CDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL BOONE
COUNTY UNTIL 430 PM CDT...

AT 406 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COLUMBIA...AND
MOVING EAST AT 30 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZED HAIL 3 
MILES EAST OF COLUMBIA AT 408 PM.    

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

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN BOONE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3906 9234 3903 9214 3902 9213 3901 9214
      3896 9214 3890 9217 3888 9215 3887 9216
      3886 9215 3887 9216 3886 9216 3889 9237
TIME...MOT...LOC 2110Z 282DEG 28KT 3896 9225

HAIL...1.50IN
WIND...60 MPH

$$

TRUETT

726 
WWUS53 KLSX 072126
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
426 PM CDT FRI SEP 7 2012

MOC019-072136-
/O.EXP.KLSX.SV.W.0276.000000T0000Z-120907T2130Z/
BOONE MO-
426 PM CDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BOONE COUNTY WILL
EXPIRE AT 430 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 10 PM.

LAT...LON 3906 9234 3903 9214 3902 9213 3901 9214
      3896 9214 3890 9217 3888 9215 3887 9216
      3886 9215 3887 9216 3886 9216 3889 9237
TIME...MOT...LOC 2126Z 282DEG 28KT 3893 9209

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 3:02 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	43 min
Sep 7, 3:18 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	42 min
Sep 7, 3:36 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	54 min
Sep 7, 3:51 PM CDT	Severe Thunderstorm Warning	LSX	Washington	39 min
Sep 7, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Washington	35 min
Sep 7, 4:13 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	62 min
Sep 7, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	42 min
Sep 7, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron	51 min
Sep 7, 4:46 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	44 min
Sep 7, 4:50 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	40 min
Sep 7, 5:00 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Sep 7, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	42 min
Sep 7, 5:13 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	32 min
Sep 7, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	30 min
Sep 7, 5:22 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	23 min
Sep 7, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	31 min
Sep 7, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	35 min
Sep 7, 5:49 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	41 min
Sep 7, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	40 min
Sep 7, 6:00 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	30 min
Sep 7, 6:03 PM CDT	Areal Flood Advisory	LSX	Iron, Reynolds	6 hr
Sep 7, 6:22 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	53 min
Sep 7, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds	49 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.