Alert archive / Missouri / Tornado Warnings in 2004

Tornado Warning 36, NWS St. Louis, MO

May 30, 2004Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at May 30, 2004, 4:45 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 45 min. 8 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
May 30, 2004, 4:45 PM CDT (21:45 UTC)
Expired
May 30, 2004, 5:30 PM CDT
In force
45 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 5 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.

What was reported inside it

TimeReportWhereRemark
May 30, 4:45 PM CDTHAIL 0.25St. Charles, MOHWY K AND MEXICO ROAD
May 30, 5:10 PM CDTHAIL 1.75Maryland Heights, MO
May 30, 5:10 PM CDTHAIL 1.75Overland, MOEARTH CITY AT I-70...HANELY AND PAGE INTERSECTION
May 30, 5:15 PM CDTHAIL 0.25Augusta, MO
May 30, 5:15 PM CDTHAIL 0.88Hazelwood, MO
May 30, 5:21 PM CDTHAIL 0.25Florissant, MO
May 30, 5:25 PM CDTTSTM WND GST 60Florissant, MO
May 30, 5:38 PM CDTTSTM WND DMGDefiance, MO8 TO 10 INCH DIAMETER TREES BLOWN DOWN ALONG HIGHWAY 94 IN DEFIANCE.

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.

IssuedProductOfficeLasted
May 30, 1:05 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.8 hours before the alert went out and 240 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1629 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1629 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
177 m²/s²
Significant tornado parameter
1.4
Supercell composite
8.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 302145
TORLSX
MOC183-189-302230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
445 PM CDT SUN MAY 30 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 530 PM CDT

* AT 445 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR MATSON. THE STORM WAS
  MOVING NORTHEAST AT 45 MPH...AND MAY PRODUCE A TORNADO AT ANY
  TIME

* LOCATIONS IMPACTED INCLUDE...
  CHESTERFIELD
  CLARKSON VALLEY
  MARYLAND HEIGHTS
  BRIDGETON
  ST. ANN
  WOODSON TERRACE
  HAZELWOOD
  FLORISSANT
  BERKELEY
  KINLOCH

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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

LAT...LON 3864 9097 3848 9084 3857 9048 3878 9017
          3891 9038

$$
RP/JC

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 1:34 PM CDTSevere Thunderstorm WarningLSXKnox41 min
May 30, 2:33 PM CDTSevere Thunderstorm WarningLSXMonroe, Shelby42 min
May 30, 2:36 PM CDTTornado WarningLSXOsage39 min
May 30, 2:51 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis, City of Saint Louis39 min
May 30, 3:11 PM CDTTornado WarningLSXGasconade, Osage49 min
May 30, 3:19 PM CDTSevere Thunderstorm WarningLSXLewis, Marion41 min
May 30, 3:27 PM CDTTornado WarningLSXLewis, Marion48 min
May 30, 3:28 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds, Washington62 min
May 30, 3:36 PM CDTSevere Thunderstorm WarningLSXKnox39 min
May 30, 3:40 PM CDTSevere Thunderstorm WarningLSXAudrain, Monroe50 min
May 30, 3:41 PM CDTSevere Thunderstorm WarningLSXBoone, Moniteau49 min
May 30, 3:48 PM CDTTornado WarningLSXReynolds42 min
May 30, 3:52 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren53 min
May 30, 3:56 PM CDTSevere Thunderstorm WarningLSXWashington49 min
May 30, 3:59 PM CDTTornado WarningLSXFranklin46 min
May 30, 4:25 PM CDTSevere Thunderstorm WarningLSXSaint Charles50 min
May 30, 4:28 PM CDTSevere Thunderstorm WarningLSXIron, Washington47 min
May 30, 4:32 PM CDTSevere Thunderstorm WarningLSXJefferson28 min
May 30, 4:42 PM CDTTornado WarningLSXFranklin48 min
May 30, 4:51 PM CDTTornado WarningLSXJefferson39 min
May 30, 4:53 PM CDTSevere Thunderstorm WarningLSXMadison, Sainte Genevieve, Saint Francois52 min
May 30, 5:03 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds42 min
May 30, 5:09 PM CDTSevere Thunderstorm WarningLSXCity of Saint Louis36 min
May 30, 5:25 PM CDTTornado WarningLSXReynolds35 min
May 30, 5:27 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis, City of Saint Louis48 min

Nearby

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