Alert archive / Missouri / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 32, NWS St. Louis, MO

May 23, 2004Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 23, 2004, 6:57 PM CDT for Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 48 min. 6 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 23, 2004, 6:57 PM CDT (23:57 UTC)
Expired: May 23, 2004, 7:45 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Monroe County, IL, Saint Clair County, IL, City of Saint Louis, MO, Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 33 km from the middle of the area, began a volume at 23:58 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
May 23, 7:00 PM CDT	HAIL 1	Fenton, MO
May 23, 7:05 PM CDT	HAIL 1	Fenton, MO
May 23, 7:10 PM CDT	HAIL 0.75	Fenton, MO
May 23, 7:10 PM CDT	HAIL 1	1 Ne Parkdale, MO
May 23, 7:34 PM CDT	HAIL 1	Oakville, MO
May 23, 7:35 PM CDT	HAIL 0.88	Ellisville, MO

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 23, 4:35 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 23, 5:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 12.0 hours before the alert went out and 236 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: 435 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 621 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

792 
WUUS53 KLSX 232357
SVRLSX
ILC133-163-MOC099-189-510-240045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
656 PM CDT SUN MAY 23 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN ST. LOUIS CITY IN EAST CENTRAL MISSOURI
  NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS
  WESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 745 PM CDT

* AT 656 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HIGH RIDGE...MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SUNSET HILLS
  CRESTWOOD
  MEHLVILLE
  LAKESHIRE
  AFFTON
  LEMAY
  DUPO
  EAST CARONDELET
  CAHOKIA
  BELLEVILLE

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

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 3861 9065 3843 9065 3837 8999 3863 8994

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 11:53 AM CDT	Severe Thunderstorm Warning	LSX	Clinton	37 min
May 23, 4:36 PM CDT	Severe Thunderstorm Warning	LSX	Pike	39 min
May 23, 2:56 AM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Shelby	64 min
May 23, 2:53 PM CDT	Severe Thunderstorm Warning	LSX	Boone	37 min
May 23, 3:37 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole	38 min
May 23, 4:11 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	49 min
May 23, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Warren	60 min
May 23, 4:58 PM CDT	Severe Thunderstorm Warning	LSX	Osage	17 min
May 23, 5:36 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	39 min
May 23, 6:11 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, City of Saint Louis	49 min
May 23, 6:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, City of Saint Louis	47 min
May 23, 6:20 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	25 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2004 Severe Thunderstorm Warnings in Illinois, 2004 Every 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.