Alert archive / Missouri / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 79, NWS St. Louis, MO

May 26, 2004Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 26, 2004, 8:40 AM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 50 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 26, 2004, 8:40 AM CDT (13:40 UTC)
Expired
May 26, 2004, 9:30 AM CDT
In force
50 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), 6 km from the middle of the area, began a volume at 13:42 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 26, 9:00 AM CDTHAIL 0.75Ellisville, MONORTHWEST OF INTERSECTION OF MANCHESTER AND CLARKSON ROADS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.7 hours before the alert went out and 247 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 2004-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2004-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
43 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.

330 
WUUS53 KLSX 261340
SVRLSX
MOC183-189-261430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
840 AM CDT WED MAY 26 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 930 AM CDT

* AT 840 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF AUGUSTA...MOVING NORTHEAST
  AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  AUGUSTA
  WILDWOOD
  CLARKSON VALLEY
  CHESTERFIELD
  MARYLAND HEIGHTS
  BRIDGETON

THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING LARGE DESTRUCTIVE
HAIL. CONSIDERABLE DAMAGE IS POSSIBLE. STAY INSIDE...AND AVOID
OUTSIDE WALLS AND WINDOWS

LAT...LON 3856 9098 3858 9075 3844 9075 3866 9033
          3888 9032 3890 9066 3864 9096

$$

WDB/RP

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 8:04 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve41 min
May 26, 7:44 AM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike46 min
May 26, 8:14 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade46 min
May 26, 8:16 AM CDTSevere Thunderstorm WarningLSXOsage44 min
May 26, 8:51 AM CDTSevere Thunderstorm WarningLSXJefferson39 min
May 26, 9:21 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois39 min
May 26, 11:56 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade49 min
May 26, 12:31 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Washington44 min
May 26, 1:10 PM CDTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve50 min
May 26, 2:26 PM CDTSevere Thunderstorm WarningLSXIron, Madison, Saint Francois64 min
May 26, 4:06 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis24 min
May 26, 4:31 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis14 min
May 26, 4:59 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Osage46 min
May 26, 5:29 PM CDTSevere Thunderstorm WarningLSXLincoln46 min
May 26, 5:41 PM CDTSevere Thunderstorm WarningLSXMontgomery, Warren49 min
May 26, 6:19 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike26 min
May 26, 6:30 PM CDTTornado WarningLSXFranklin, Saint Charles, Saint Louis45 min
May 26, 6:36 PM CDTSevere Thunderstorm WarningLSXCrawford39 min
May 26, 6:40 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis50 min
May 26, 6:46 PM CDTTornado WarningLSXCrawford44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2004Every severe thunderstorm warning 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.