Alert archive / Missouri / Tornado Warnings in 2004

Tornado Warning 47, NWS St. Louis, MO

June 18, 2004Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 18, 2004, 2:45 PM CDT for Jefferson County, Saint Louis County, Missouri. It was in force for 45 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: Jun 18, 2004, 2:45 PM CDT (19:45 UTC)
Expired: Jun 18, 2004, 3:30 PM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Jefferson County, MO, Saint Louis County, MO

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 18, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 248 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: 979 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 13 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 181945
TORLSX
MOC099-189-182030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
245 PM CDT FRI JUN 18 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 330 PM CDT

* AT 245 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR EUREKA. THE STORM WAS
  MOVING EAST AT 25 MPH...AND MAY PRODUCE A TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  MURPHY
  FENTON
  SUNSET HILLS
  MEHLVILLE
  LAKESHIRE

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW MOVE TO A
BASEMENT...UNDERGROUND STORM SHELTER...OR AN INTERIOR ROOM OR HALLWAY
ON THE LOWEST LEVEL OF A STURDY BUILDING.

AVOID WINDOWS DO NOT OPEN WINDOWS...STAY AWAY FROM THEM...OPENING
WINDOWS DOES NOT MINIMIZE THE DAMAGE OF A TORNADO.

DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. BE AWARE THAT HIGHWAY
BRIDGES DO NOT PROVIDE ADEQUATE PROTECTION AND CAN ENHANCE THE STRONG
WINDS OF A TORNADO.

LAT...LON 3859 9073 3838 9074 3838 9036 3846 9030
          3858 9032

$$
RP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 2:00 PM CDT	Tornado Warning	LSX	Saint Charles	45 min
Jun 18, 2:23 PM CDT	Tornado Warning	LSX	Saint Louis	52 min
Jun 18, 2:28 PM CDT	Severe Thunderstorm Warning	LSX	Washington	47 min
Jun 18, 2:52 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	38 min
Jun 18, 3:31 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	44 min
Jun 18, 3:35 PM CDT	Flash Flood Warning	LSX	Jefferson, Saint Louis	4 hr
Jun 18, 3:36 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	39 min

Nearby

Tornado Warnings in Missouri, 2004 Every tornado warning in 2004 Tornadoes in 2004

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.