Alert archive / Missouri / Tornado Warnings in 2004

Tornado Warning 23, NWS St. Louis, MO

May 27, 2004Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at May 27, 2004, 7:15 PM CDT for Saint Louis County, Missouri. It was in force for 45 min. 1 report 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: May 27, 2004, 7:15 PM CDT (00:15 UTC)
Expired: May 27, 2004, 8:00 PM CDT
In force: 45 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Saint Louis County, MO

The radar

The St Louis radar (KLSX), 19 km from the middle of the area, began a volume at 00:29 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
May 27, 7:25 PM CDT	TSTM WND GST 60	1 N Woodson Terrace, MO	52KT/60MPH GUST AT LAMBERT FIELD.

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
May 27, 2:25 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.3 hours before the alert went out and 229 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: 651 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -105 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -3.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 280015
TORLSX
MOC189-280100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
715 PM CDT THU MAY 27 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 9 MILES NORTHWEST OF
  CHESTERFIELD. THE STORM WAS MOVING EAST AT 50 MPH...AND MAY PRODUCE
  A TORNADO AT ANY TIME

* LOCATIONS IMPACTED INCLUDE...
  CHESTERFIELD
  FRONTENAC
  CREVE COEUR
  TOWN AND COUNTRY
  BRENTWOOD
  LADUE
  RICHMOND HEIGHTS
  WARSON WOODS

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.

LAT...LON 3879 9048 3852 9074 3849 9039 3881 9026

$$

CVKING/FG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:06 PM CDT	Flash Flood Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	4 hr
May 27, 7:23 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson	37 min
May 27, 7:29 PM CDT	Tornado Warning	LSX	Franklin, Jefferson	46 min
May 27, 7:32 PM CDT	Tornado Warning	LSX	City of Saint Louis	28 min
May 27, 7:40 PM CDT	Flash Flood Warning	LSX	Jefferson	4 hr
May 27, 8:17 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	28 min
May 27, 8:21 PM CDT	Severe Thunderstorm Warning	LSX	Washington	39 min
May 27, 8:22 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	53 min
May 27, 8:37 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	38 min
May 27, 11:00 PM CDT	Flash Flood Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.