Alert archive / Missouri / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 40, NWS St. Louis, MO

April 29, 2003Jefferson County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2003, 4:49 PM CDT for Jefferson County, Missouri. It was in force for 41 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, 4:49 PM CDT (21:49 UTC)
Expired: Apr 29, 2003, 5:30 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 41 km from the middle of the area, began a volume at 21:53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 29, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.8 hours before the alert went out and 264 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.

394 
WUUS53 KLSX 292149
SVRLSX
MOC099-292230-

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 530 PM CDT

* AT 449 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HOUSE SPRINGS...MOVING NORTHEAST AT 15
  MPH. THE PRIMARY THREAT FROM THIS STORM WILL BE DAMAGING HAIL.

* LOCATIONS IMPACTED INCLUDE...
  HIGH RIDGE

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3831 9075 3817 9047 3839 9034 3851 9063

$$
FG

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, 5:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	46 min
Apr 29, 5:57 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	48 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.