Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 27, NWS St. Louis, MO

March 30, 1998Marion County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 30, 1998, 8:57 PM CST for Marion County, Missouri. It was in force for 33 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
Mar 30, 1998, 8:57 PM CST (02:57 UTC)
Expired
Mar 30, 1998, 9:30 PM CST
In force
33 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Marion County, MO

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 02:58 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 223 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, Davenport, at 00:00Z on 1998-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 226 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, Davenport, at 00:00Z on 1998-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 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
226 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1587 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

128 
WUUS1 KSTL 310256 RRA
SVRSTL
MOC127-310330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
857 PM CST MON MAR 30 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST MISSOURI
 
   ...NORTHERN MARION COUNTY
 
AT 855 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS DETECTING A
SEVERE THUNDERSTORM NEAR EMDEN IN EASTERN SHELBY COUNTY. THE STORM WAS
MOVING TO THE NORTHEAST AT 50 MPH AND WILL MOVE THROUGH NORTHERN MARION
COUNTY. TOWNS IN THE PATH OF THIS SEVERE STORM ARE PHILADELPHIA AND
TAYLOR.
 
REMEMBER...A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.
IF OUTDOORS...SEEK INSIDE SHELTER IMMEDIATELY. STAY AWAY FROM
WINDOWS.
 
GKS/DF

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, Mar 30, 8:55 PM CST, 2 minutes before
ILZ058-059-095>100-MOZ027-034>036-041-042-047>052-059>065-072-073-
310900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
855 PM CST MON MAR 30 1998

...A TORNADO WATCH IS IN EFFECT UNTIL 300 AM CST FOR PORTIONS OF
NORTHEAST...CENTRAL...AND EAST CENTRAL MISSOURI...

AT 855 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS THAT EXTENDED FROM
NORTHEAST MISSOURI INTO CENTRAL MISSOURI.  THE INDIVIDUAL STORMS WERE
MOVING TO THE NORTHEAST AROUND 55 MILES AN HOUR.  PERSONS IN THE WATCH
AREA SHOULD REMAIN ALERT FOR LATER STATEMENTS AND POSSIBLE WARNINGS
FROM THE NATIONAL WEATHER SERVICE.
Special weather statement, Mar 30, 8:55 PM CST, 2 minutes before
ILZ058-059-095>100-MOZ027-034>036-041-042-047>052-059>065-072-073-
310900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
855 PM CST MON MAR 30 1998

...A TORNADO WATCH IS IN EFFECT UNTIL 300 AM CST FOR PORTIONS OF
NORTHEAST...CENTRAL...AND EAST CENTRAL MISSOURI...

AT 855 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS THAT EXTENDED FROM
NORTHEAST MISSOURI INTO CENTRAL MISSOURI.  THE INDIVIDUAL STORMS WERE
MOVING TO THE NORTHEAST AROUND 55 MILES AN HOUR.  PERSONS IN THE WATCH
AREA SHOULD REMAIN ALERT FOR LATER STATEMENTS AND POSSIBLE WARNINGS
FROM THE NATIONAL WEATHER SERVICE.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 6:35 PM CSTSevere Thunderstorm WarningLSXScotland10 min
Mar 30, 6:48 PM CSTSevere Thunderstorm WarningLSXScotland17 min
Mar 30, 6:58 PM CSTSevere Thunderstorm WarningLSXClark17 min
Mar 30, 8:48 PM CSTSevere Thunderstorm WarningLSXShelby27 min
Mar 30, 9:15 PM CSTSevere Thunderstorm WarningLSXMonroe30 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.