Alert archive / Missouri / Tornado Warnings in 2003

Tornado Warning 12, NWS St. Louis, MO

May 6, 2003Jefferson County, Missouri

NWS St. Louis, MO issued this tornado warning at May 6, 2003, 6:37 PM CDT for Jefferson County, Missouri. It was in force for 53 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: May 6, 2003, 6:37 PM CDT (23:37 UTC)
Expired: May 6, 2003, 7:30 PM CDT
In force: 53 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 37 km from the middle of the area, began a volume at 23:38 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 6, 5:40 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.6 hours before the alert went out and 263 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: 1097 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 42 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.

291 
WFUS53 KLSX 062337
TORLSX
MOC099-070030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
636 PM CDT TUE MAY 6 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  JEFFERSON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 730 PM CDT

* AT 636 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 18 MILES WEST OF OERMANN.
  THE STORM WAS MOVING EAST AT 35 MPH. THIS STORM HAS A HISTORY OF
  PRODUCING TORNADOES AND MAY PRODUCE ADDITIONAL TORNADOES AT ANY
  TIME

* LOCATIONS IMPACTED INCLUDE...
  DITTMER
  OERMANN
  CEDAR HILL
  SCOTSDALE
  HOUSE SPRINGS
  BYRNES MILL
  ANTONIA
  OTTO
  BARNHART
  HILLSBORO
  FESTUS

THIS IS AN EXTREMELY DANGEROUS AND LIFE-THREATENING SITUATION. MOVE
IMMEDIATELY TO A BASEMENT OR BELOW GROUND SHELTER. IF UNDERGROUND
SHELTER IS NOT AVAILABLE...TAKE COVER ON THE LOWEST FLOOR OF A STURDY
BUILDING OR HOME IN A SMALL INTERIOR ROOM...SUCH AS A CLOSET OR
HALLWAY. HIDE UNDER A MATRESS OR USE BLANKETS OR PILLOWS TO COVER
YOUR BODY.

THE TORNADO WITH THIS STORM WILL LIKELY BE WRAPPED IN RAIN. DO NOT BE
LULLED INTO THINKING THE THREAT IS OVER DUE TO THE RAINFALL. STAY IN
SHELTER UNTIL THE LATEST WEATHER INFORMATION INDICATES THE THREAT HAS
PASSED.

THIS STORM WILL ALSO PRODUCE LARGE DESTRUCTIVE HAIL AND DAMAGING
WINDS IN EXCESS OF 60 MPH.

LAT...LON 3846 9073 3826 9076 3821 9043 3846 9039

$$

MB/ST

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 3:32 PM CDT	Tornado Warning	LSX	Moniteau	43 min
May 6, 4:14 PM CDT	Tornado Warning	LSX	Cole, Moniteau	46 min
May 6, 4:51 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	39 min
May 6, 4:54 PM CDT	Tornado Warning	LSX	Cole, Osage	66 min
May 6, 5:28 PM CDT	Tornado Warning	LSX	Gasconade	62 min
May 6, 5:51 PM CDT	Tornado Warning	LSX	Franklin	54 min
May 6, 6:07 PM CDT	Tornado Warning	LSX	Crawford	53 min
May 6, 6:18 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	42 min
May 6, 6:42 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	63 min
May 6, 6:45 PM CDT	Tornado Warning	LSX	Franklin	30 min
May 6, 6:46 PM CDT	Tornado Warning	LSX	Washington	59 min

Nearby

Tornado Warnings in Missouri, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.