Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS St. Louis, MO

April 13, 1998Boone County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 13, 1998, 1:42 PM CDT for Boone County, 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 counties it named.

The facts

Issued
Apr 13, 1998, 1:42 PM CDT (18:42 UTC)
Expired
Apr 13, 1998, 2:45 PM CDT
In force
63 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Boone County, MO

The radar

The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 18:41 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.

IssuedProductOfficeLasted
Apr 13, 11:30 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.7 hours before the alert went out and 267 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, Springfield, MO 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, Springfield, MO at 12:00Z on 1998-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 407 square meters per square second.1939587897Sfc1 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
804 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
407 m²/s²
0-3 km storm-relative helicity
400 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.

294 
WUUS1 KSTL 131843 RRA
SVRSTL
MOC019-131945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
142 PM CDT MON APR 13 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MISSOURI
 
   ...BOONE COUNTY
 
AT 140 PM...THE ST LOUIS DOPPLER RADAR INDICATED A SEVERE STORM NEAR THE
CITY OF EASLEY. THIS STORM WAS MOVING TO THE NORTHEAST AT 30 MPH. CITY
IN THE PATH OF THIS STORM IS THE SOUTHERN PORTION OF COLUMBIA AND ALSO
ROCK RIDGE STATE PARK.
 
 
THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.
 
THIS IS A DANGEROUS STORM BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.
 
VA/WW

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, 1:56 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, 4:16 PM CDTTornado WarningLSXSaint Charles44 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

Severe Thunderstorm Warnings in Missouri, 1998Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.