Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 132, NWS St. Louis, MO

May 21, 1998Madison County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 21, 1998, 7:12 PM CDT for Madison County, Missouri. It was in force for 48 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
May 21, 1998, 7:12 PM CDT (00:12 UTC)
Expired
May 21, 1998, 8:00 PM CDT
In force
48 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Madison County, MO

The radar

The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 00:13 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
May 21, 4:30 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.2 hours before the alert went out and 297 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, Little Rock, AR at 00:00Z on 1998-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3010 joules per kilogram.LCLLFCEL10008507005003002001001 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, Little Rock, AR at 00:00Z on 1998-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -28 square meters per square second.1939Sfc1 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
3010 J/kg
Mixed-layer CIN
-223 J/kg
Mixed-layer LCL
1288 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-28 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

840 
WUUS1 KSTL 220013 RRA
SVRSTL
MOC123-220100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
712 PM CDT THU MAY 21 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MADISON COUNTY MISSOURI IN SOUTHEASTERN MISSOURI

* UNTIL 800 PM CDT

* AT 710 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF FREDERICKTOWN... MOVING
  EAST SOUTHEAST AT 30 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  MARQUAND

THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY
FROM WINDOWS.

GKS/DJP

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 21, 2:06 PM CDT, 5 hours 6 minutes before
ILZ058-059-099-MOZ061>064-212000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
206 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF
EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS...

THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH...

IN MISSOURI...ST LOUIS COUNTY AND CITY...ST CHARLES...FRANKLIN

IN ILLINOIS...GREENE...JERSEY...MACOUPIN

.END
GLASS
Special weather statement, May 21, 3:00 PM CDT, 4 hours 12 minutes before
ILZ060-064-100>102-MOZ065-072-073-212100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
300 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF
EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS...

THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH...

IN MISSOURI...CRAWFORD...WASHINGTON...JEFFERSON

IN ILLINOIS...MONROE...ST CLAIR...MADISON...BOND...MONTGOMERY

.END
GLASS
Special weather statement, May 21, 4:17 PM CDT, 2 hours 55 minutes before
ILZ079-212130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
417 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH #386 HAS BEEN CANCELLED FOR PORTIONS OF
SOUTHWEST ILLINOIS...

IN 6ILLINOIS...RANDOLPH COUNTY

.END
Special weather statement, May 21, 4:17 PM CDT, 2 hours 55 minutes before
ILZ079-212130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
417 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH #386 HAS BEEN CANCELLED FOR PORTIONS OF
SOUTHWEST ILLINOIS...

IN 6ILLINOIS...RANDOLPH COUNTY

.END
Special weather statement, May 21, 6:31 PM CDT, 41 minutes before
MOZ047>049-059-062-220000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
631 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR A PORTION OF
CENTRAL AND EAST CENTRAL MISSOURI...

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...

IN MISSOURI...MONITEAU...COLE...OSAGE...GASCONADE...FRANKLIN

PERIODS OF SHOWERS OR THUNDERSTORMS WILL CONTINUE THIS EVENING
ACROSS THE REGION...HOWEVER THE THREAT OF SEVERE THUNDERSTORMS HAS
DIMINISHED.

AMS
Special weather statement, May 21, 6:31 PM CDT, 41 minutes before
MOZ047>049-059-062-220000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
631 PM CDT THU MAY 21 1998

...SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR A PORTION OF
CENTRAL AND EAST CENTRAL MISSOURI...

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...

IN MISSOURI...MONITEAU...COLE...OSAGE...GASCONADE...FRANKLIN

PERIODS OF SHOWERS OR THUNDERSTORMS WILL CONTINUE THIS EVENING
ACROSS THE REGION...HOWEVER THE THREAT OF SEVERE THUNDERSTORMS HAS
DIMINISHED.

AMS

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 12:40 AM CDTSevere Thunderstorm WarningLSXScotland60 min
May 22, 1:04 AM CDTSevere Thunderstorm WarningLSXKnox61 min
May 22, 1:20 AM CDTSevere Thunderstorm WarningLSXLincoln65 min
May 22, 1:27 AM CDTSevere Thunderstorm WarningLSXClark, Lewis63 min
May 22, 1:52 AM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis63 min
May 22, 1:57 AM CDTSevere Thunderstorm WarningLSXMarion, Shelby63 min
May 22, 2:34 AM CDTSevere Thunderstorm WarningLSXRalls61 min
May 22, 2:48 AM CDTSevere Thunderstorm WarningLSXPike62 min
May 22, 5:01 PM CDTSevere Thunderstorm WarningLSXOsage49 min
May 22, 5:25 PM CDTSevere Thunderstorm WarningLSXGasconade45 min
May 22, 5:55 PM CDTSevere Thunderstorm WarningLSXCrawford50 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.