Alert archive / Missouri / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 42, NWS St. Louis, MO

April 29, 2003Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2003, 5:57 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 48 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: Apr 29, 2003, 5:57 PM CDT (22:57 UTC)
Expired: Apr 29, 2003, 6:45 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties City of Saint Louis, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 33 km from the middle of the area, began a volume at 23:00 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 222 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: 2331 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 119 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.

291 
WUUS53 KLSX 292257
SVRLSX
MOC189-510-292345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
557 PM CDT TUE APR 29 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 645 PM CDT

* AT 557 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM OVER CRESTWOOD...MOVING NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MAPLEWOOD
  RICHMOND HEIGHTS
  CLAYTON
  UNIVERSITY CITY
  HILLSDALE
  ST. LOUIS
  GREENDALE
  UPLANDS PARK
  NORTHWOODS
  BEVERLY HILLS

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 3855 9052 3845 9032 3864 9018 3872 9020
          3882 9013 3886 9028

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 2:06 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	39 min
Apr 29, 4:30 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois	45 min
Apr 29, 4:49 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	41 min
Apr 29, 5:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	46 min
Apr 29, 6:09 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	51 min
Apr 29, 6:33 PM CDT	Severe Thunderstorm Warning	LSX	Washington	27 min
Apr 29, 6:37 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	53 min
Apr 29, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2003 Every severe thunderstorm warning in 2003

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; radar from the NEXRAD Level II archive.