Alert archive / Missouri / Tornado Warnings in 1998

Tornado Warning 10, NWS St. Louis, MO

April 13, 1998Saint Charles County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 13, 1998, 4:16 PM CDT for Saint Charles County, Missouri. It was in force for 44 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 13, 1998, 4:16 PM CDT (21:16 UTC)
Expired
Apr 13, 1998, 5:00 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Charles County, MO

The radar

The St Louis radar (KLSX), 9 km from the middle of the area, began a volume at 21:20 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
Apr 13, 4:22 PM CDTTornado F0Foristell, MO
Apr 13, 4:50 PM CDTThunderstorm Wind 52St Paul, MO
Apr 13, 4:50 PM CDTThunderstorm Wind 52O Fallon, MO
Apr 13, 5:05 PM CDTThunderstorm Wind 60St Charles Arpt, MOThunderstorm wind gusts destroyed a barn near the St. Charles Airport.

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
Apr 13, 3:45 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.3 hours before the alert went out and 234 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 12:00Z on 1998-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 1998-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 337 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1703 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
337 m²/s²
0-3 km storm-relative helicity
313 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.

000 
TTAA00 KSTL 132116 RRA
TORSTL
MOC183-132200-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
416 PM CDT MON APR 13 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  500 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...WESTERN ST. CHARLES COUNTY
 
AT 415 PM RADAR INDICATED A TORNADO JUST EAST OF WARRENTON MOVING EAST
AT 30 MPH. A CONFIRMED TORNADO WAS REPORTED EARLIER NEAR WARRENTON.
 
TOWNS IN THE PATH OF THE STORM ARE WENTZVILLE AND OFALLON.
 
 
 
THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY AND SEEK SHELTER
NOW!

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 10:41 AM CDTSevere Thunderstorm WarningLSXFranklin49 min
Apr 13, 12:04 PM CDTSevere Thunderstorm WarningLSXSaint Francois56 min
Apr 13, 12:10 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve50 min
Apr 13, 1:42 PM CDTSevere Thunderstorm WarningLSXBoone63 min
Apr 13, 1:56 PM CDTSevere Thunderstorm WarningLSXMonroe49 min
Apr 13, 2:19 PM CDTSevere Thunderstorm WarningLSXCallaway41 min
Apr 13, 2:48 PM CDTSevere Thunderstorm WarningLSXCrawford42 min
Apr 13, 2:57 PM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery48 min
Apr 13, 3:05 PM CDTTornado WarningLSXCallaway, Montgomery40 min
Apr 13, 3:09 PM CDTTornado WarningLSXCrawford51 min
Apr 13, 3:19 PM CDTSevere Thunderstorm WarningLSXWarren41 min
Apr 13, 3:24 PM CDTTornado WarningLSXWashington51 min
Apr 13, 3:48 PM CDTSevere Thunderstorm WarningLSXCrawford42 min
Apr 13, 3:52 PM CDTTornado WarningLSXWarren53 min
Apr 13, 4:11 PM CDTTornado WarningLSXJefferson, Washington49 min
Apr 13, 4:21 PM CDTSevere Thunderstorm WarningLSXLincoln54 min
Apr 13, 4:40 PM CDTTornado WarningLSXSaint Charles65 min
Apr 13, 4:45 PM CDTTornado WarningLSXSainte Genevieve, Saint Francois60 min
Apr 13, 4:54 PM CDTSevere Thunderstorm WarningLSXIron, Washington66 min
Apr 13, 4:54 PM CDTSevere Thunderstorm WarningLSXReynolds66 min
Apr 13, 5:19 PM CDTSevere Thunderstorm WarningLSXFranklin41 min
Apr 13, 5:36 PM CDTTornado WarningLSXSaint Louis54 min
Apr 13, 5:42 PM CDTTornado WarningLSXSainte Genevieve63 min
Apr 13, 5:50 PM CDTTornado WarningLSXCity of Saint Louis40 min
Apr 13, 5:56 PM CDTTornado WarningLSXJefferson49 min
Apr 13, 6:19 PM CDTTornado WarningLSXIron, Reynolds41 min
Apr 13, 6:32 PM CDTTornado WarningLSXMadison58 min

Nearby

Tornado Warnings in Missouri, 1998Every tornado warning in 1998Tornadoes in 1998

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.