Alert archive / Missouri / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 69, NWS St. Louis, MO

May 6, 2003Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 6, 2003, 6:42 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 63 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: May 6, 2003, 6:42 PM CDT (23:42 UTC)
Expired: May 6, 2003, 7:45 PM CDT
In force: 63 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), 19 km from the middle of the area, began a volume at 23:43 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
May 6, 5:40 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 241 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: 1097 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 42 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.

634 
WUUS53 KLSX 062342
SVRLSX
MOC189-510-070045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
641 PM CDT TUE MAY 6 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 745 PM CDT

* AT 641 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 18 MILES WEST OF WILDWOOD...MOVING EAST AT 35
  MPH. THE PRIMARY THREATS FROM THIS STORM WILL BE VERY DAMAGING
  WINDS OF 70 MPH OR STRONGER AND HAIL OF GOLFBALL SIZE OR LARGER.

* LOCATIONS IMPACTED INCLUDE...
  EUREKA
  FENTON
  SUNSET HILLS
  VALLEY PARK
  ARNOLD
  
THIS IS A DANGEROUS SEVERE THUNDERSTORM CAPABLE OF PRODUCING
DESTRUCTIVE HAIL GOLFBALL SIZE OR LARGER...AND DAMAGING WINDS IN
EXCESS OF 70 MPH. SEEK SHELTER NOW IN AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS...AND STAY AWAY FROM WINDOWS

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING. DO NOT
TAKE COVER UNDERNEATH TREES IF BOATING...GET OFF OF THE WATER AND
MOVE TO A SAFE SHELTER NOW IF CAMPING...ABANDON TENTS FOR A STURDY
STRUCTURE. AVOID LOW LYING AREAS...CREEK BEDS...AND LOW WATER
CROSSINGS AS THESE CAN FLOOD QUICKY.

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 3863 9072 3848 9073 3849 9028 3866 9020

$$

MB/ST

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 3:32 PM CDT	Tornado Warning	LSX	Moniteau	43 min
May 6, 4:14 PM CDT	Tornado Warning	LSX	Cole, Moniteau	46 min
May 6, 4:51 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	39 min
May 6, 4:54 PM CDT	Tornado Warning	LSX	Cole, Osage	66 min
May 6, 5:28 PM CDT	Tornado Warning	LSX	Gasconade	62 min
May 6, 5:51 PM CDT	Tornado Warning	LSX	Franklin	54 min
May 6, 6:07 PM CDT	Tornado Warning	LSX	Crawford	53 min
May 6, 6:18 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	42 min
May 6, 6:37 PM CDT	Tornado Warning	LSX	Jefferson	53 min
May 6, 6:45 PM CDT	Tornado Warning	LSX	Franklin	30 min
May 6, 6:46 PM CDT	Tornado Warning	LSX	Washington	59 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.