Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 25, NWS St. Louis, MO

March 30, 1998Clark County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 30, 1998, 6:58 PM CST for Clark County, Missouri. It was in force for 17 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, 6:58 PM CST (00:58 UTC)
Expired: Mar 30, 1998, 7:15 PM CST
In force: 17 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Clark County, MO

The radar

The Quad Cities radar (KDVN), 165 km from the middle of the area, began a volume at 01:02 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.

Issued	Product	Office	Lasted
Mar 30, 3:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 170 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

537 
WUUS1 KSTL 310057 RRA
SVRSTL
MOC045-310115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
658 PM CST MON MAR 30 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST MISSOURI
 
   ...NORTHERN CLARK COUNTY
 
AT 656 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS DETECTING A
SEVERE THUNDERSTORM 10 MILES NORTHEAST OF MEMPHIS. THE STORM WAS MOVING
TO THE NORTHEAST AT 50 MPH AND WILL MOVE ACROSS NORTHERN CLARK
COUNTY...NORTH OF LURAY. THE STORM PRODUCED DIME SIZE HAIL AT 642 PM IN
THE TOWN OF MEMPHIS.
 
REMEMBER...A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.
IF OUTDOORS...SEEK INSIDE SHELTER IMMEDIATELY. STAY AWAY FROM
WINDOWS.
 
GKS/DF
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 6:35 PM CST	Severe Thunderstorm Warning	LSX	Scotland	10 min
Mar 30, 6:48 PM CST	Severe Thunderstorm Warning	LSX	Scotland	17 min
Mar 30, 8:48 PM CST	Severe Thunderstorm Warning	LSX	Shelby	27 min
Mar 30, 8:57 PM CST	Severe Thunderstorm Warning	LSX	Marion	33 min
Mar 30, 9:15 PM CST	Severe Thunderstorm Warning	LSX	Monroe	30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1998 Every 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.