Alert archive / Missouri / Tornado Warnings in 2005

Tornado Warning 4, NWS St. Louis, MO

April 21, 2005Callaway County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 21, 2005, 4:40 PM CDT for Callaway County, Missouri. It was in force for 50 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: Apr 21, 2005, 4:40 PM CDT (21:40 UTC)
Expired: Apr 21, 2005, 5:30 PM CDT
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Callaway County, MO

The radar

The St Louis radar (KLSX), 120 km from the middle of the area, began a volume at 21:44 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, 9.7 hours before the alert went out and 252 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: 780 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 93 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.

000 
WFUS53 KLSX 212141
TORLSX
MOC027-212230-
/O.NEW.KLSX.TO.W.0004.050421T2140Z-050421T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
440 PM CDT THU APR 21 2005

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN CALLAWAY COUNTY IN CENTRAL MISSOURI

* UNTIL 530 PM CDT

* AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 7 MILES NORTHWEST OF HOLTS
  SUMMIT...MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LAKE MYKEE
  HOLTS SUMMIT
  NEW BLOOMFIELD

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

LAT...LON 3877 9220 3864 9222 3857 9205 3869 9186
      3883 9189

$$

CARNEY

3 follow-up statements

000 
WWUS53 KLSX 212152
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
451 PM CDT THU APR 21 2005

MOC027-212230-
/O.CON.KLSX.TO.W.0004.000000T0000Z-050421T2230Z/
CALLAWAY MO-
451 PM CDT THU APR 21 2005

...A TORNADO WARNING CONTINUES UNTIL 530 PM CDT FOR SOUTHERN 
CALLAWAY COUNTY...

AT 448 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO OVER NEW BLOOMFIELD...MOVING EAST AT 20 MPH.

A SECOND TORNADIC THUNDERSTORM HAS ALSO DEVELOPED NEAR 
WAINWRIGHT...AND MOVING NORTHEAST AT 20 MPH.

LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE...
LAKE MYKEE...GUTHRIE...HOLTS SUMMIT...NEW BLOOMFIELD...WAINWRIGHT AND
TEBBETTS.

IN ADDITION TO THE TORNADO...THIS TORNADO IS CAPABLE OF PRODUCING 
GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3877 9220 3863 9221 3856 9205 3869 9186
      3883 9189

$$

CARNEY

000 
WWUS53 KLSX 212209 RRA
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
508 PM CDT THU APR 21 2005

MOC027-212230-
/O.CON.KLSX.TO.W.0004.000000T0000Z-050421T2230Z/
CALLAWAY MO-
508 PM CDT THU APR 21 2005

...A TORNADO WARNING CONTINUES UNTIL 530 PM CDT FOR SOUTHERN 
CALLAWAY COUNTY...

AT 503 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO 5 MILES EAST OF NEW BLOOMFIELD...MOVING EAST AT 20
MPH.

LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE...
TEBBETTS.

IN ADDITION TO THE TORNADO...THIS TORNADO IS CAPABLE OF PRODUCING 
BASEBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.  GOLF BALL 
TO BASEBALL SIZED HAIL OCCURRED ABOUT 2 MILES NORTHWEST OF 
WAINWRIGHT AT 506 PM.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3877 9220 3863 9221 3856 9205 3869 9186
      3883 9189

$$

CARNEY/TRUETT

000 
WWUS53 KLSX 212230
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
530 PM CDT THU APR 21 2005

MOC027-212240-
/O.EXP.KLSX.TO.W.0004.000000T0000Z-050421T2230Z/
CALLAWAY MO-
530 PM CDT THU APR 21 2005

...THE TORNADO WARNING FOR SOUTHERN CALLAWAY COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE COUNTY.

LAT...LON 3877 9220 3863 9221 3856 9205 3869 9186
      3883 9189

$$
CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 9:08 PM CDT	Severe Thunderstorm Warning	LSX	Washington	54 min
Apr 20, 10:54 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin	51 min
Apr 20, 11:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	49 min
Apr 21, 3:04 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	42 min
Apr 21, 4:25 AM CDT	Flash Flood Warning	LSX	Crawford	5 hr
Apr 21, 5:53 AM CDT	Flash Flood Warning	LSX	Jefferson	4 hr
Apr 21, 3:33 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	42 min
Apr 21, 3:51 PM CDT	Tornado Warning	LSX	Moniteau	41 min
Apr 21, 4:13 PM CDT	Tornado Warning	LSX	Boone	32 min
Apr 21, 4:44 PM CDT	Severe Thunderstorm Warning	LSX	Boone	17 min
Apr 21, 4:48 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade	42 min
Apr 21, 4:53 PM CDT	Severe Thunderstorm Warning	LSX	Iron	55 min
Apr 21, 4:59 PM CDT	Tornado Warning	LSX	Osage	46 min
Apr 21, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	45 min
Apr 21, 5:17 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	58 min
Apr 21, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade	30 min
Apr 21, 5:41 PM CDT	Tornado Warning	LSX	Osage	49 min
Apr 21, 5:55 PM CDT	Severe Thunderstorm Warning	LSX	Washington	50 min
Apr 21, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	50 min
Apr 21, 6:18 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	42 min
Apr 21, 6:39 PM CDT	Flash Flood Warning	LSX	Washington	5 hr
Apr 21, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Washington	50 min
Apr 21, 6:55 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	54 min

Nearby

Tornado Warnings in Missouri, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.