Alert archive / Missouri / Tornado Warnings in 2002

Tornado Warning 15, NWS St. Louis, MO

May 7, 2002Saint Charles County, Missouri

NWS St. Louis, MO issued this tornado warning at May 7, 2002, 2:23 AM CDT for Saint Charles County, Missouri. It was in force for 52 min. 2 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 7, 2002, 2:23 AM CDT (07:23 UTC)
Expired
May 7, 2002, 3:15 AM CDT
In force
52 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

County Saint Charles County, MO

The radar

The St Louis radar (KLSX), 34 km from the middle of the area, began a volume at 07:26 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 7, 2:26 AM CDTThunderstorm Wind 76 EPortage Des Sioux, MO
May 7, 2:48 AM CDTThunderstorm Wind 76 EOrchard Farm, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
May 7, 12:45 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.4 hours before the alert went out and 207 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 00:00Z on 2002-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 854 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2002-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939587897117Sfc1 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
854 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 070723
TORSTL
MOC183-070815-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
223 AM CDT TUE MAY 7 2002

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 315 AM CDT

* AT 223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 8 MILES NORTHWEST OF
  ORCHARD FARMS. THE THUNDERSTORM WAS MOVING EAST AT 40 MPH...AND MAY
  PRODUCE A TORNADO AT ANY TIME

* LOCATIONS IN THE PATH...
  ORCHARD FARMS
  PORTAGE DES SIOUX
  WEST ALTON

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW MOVE TO A
BASEMENT...UNDERGROUND STORM SHELTER...OR AN INTERIOR ROOM OR HALLWAY
ON THE LOWEST LEVEL OF A STURDY BUILDING.

LAT...LON 3897 9052 3887 9058 3882 9012 3893 9028

CARNEY

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 11:04 PM CDTSevere Thunderstorm WarningLSX41 min
May 6, 11:34 PM CDTSevere Thunderstorm WarningLSX41 min
May 6, 11:45 PM CDTSevere Thunderstorm WarningLSX45 min
May 7, 12:11 AM CDTSevere Thunderstorm WarningLSX64 min
May 7, 12:13 AM CDTTornado WarningLSXAudrain, Callaway62 min
May 7, 12:19 AM CDTSevere Thunderstorm WarningLSX41 min
May 7, 12:38 AM CDTSevere Thunderstorm WarningLSX22 min
May 7, 12:53 AM CDTFlash Flood WarningLSXAudrain, Boone, Callaway6 hr
May 7, 1:04 AM CDTSevere Thunderstorm WarningLSX41 min
May 7, 1:47 AM CDTSevere Thunderstorm WarningLSX28 min
May 7, 2:09 AM CDTFlash Flood WarningLSXLincoln, Montgomery5 hr
May 7, 2:09 AM CDTTornado WarningLSXLincoln51 min
May 7, 3:10 AM CDTSevere Thunderstorm WarningLSX60 min
May 7, 3:11 AM CDTSevere Thunderstorm WarningLSX34 min
May 7, 3:18 AM CDTSevere Thunderstorm WarningLSX27 min
May 7, 3:27 AM CDTSevere Thunderstorm WarningLSX33 min
May 7, 3:38 AM CDTSevere Thunderstorm WarningLSX52 min
May 7, 3:46 AM CDTSevere Thunderstorm WarningLSX44 min
May 7, 3:49 AM CDTSevere Thunderstorm WarningLSX41 min
May 7, 3:58 AM CDTFlash Flood WarningLSXSaint Charles, Warren6 hr
May 7, 4:02 AM CDTSevere Thunderstorm WarningLSX43 min

Nearby

Tornado Warnings in Missouri, 2002Every tornado warning in 2002Tornadoes in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.