Alert archive / Missouri / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 34, NWS St. Louis, MO

May 24, 1989Clark County, Scotland County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 24, 1989, 4:06 AM CDT for Clark County, Scotland County, Missouri. It was in force for 69 min.

The area

The counties it named.

The facts

Issued: May 24, 1989, 4:06 AM CDT (09:06 UTC)
Expired: May 24, 1989, 5:15 AM CDT
In force: 69 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Clark County, MO, Scotland County, MO

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 9.1 hours before the alert went out and 200 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1950 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 99 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 240907
SVRSTL
MOC045-197-199-241015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
406 AM CDT WED MAY 24 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST MISSOURI
          ...NORTHERN CLARK...SCHUYLER...SCOTLAND
 
AT 4AM...A CLUSTER OF SEVERE THUNDERSTORMS WAS MOVING SOUTHEAST OUT OF
IOWA INTO MISSOURI. THESE STORMS HAVE PRODUCED LARGE HAIL AND HIGH
WINDS AS THEY MOVED ACROSS PORTIONS OF IOWA.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
FELDT

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 24, 3:44 AM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
335 AM CDT WED MAY 24 1989

...SEVERE THUNDERSTORM WATCH FOR NORTHEAST MISSOURI...

A CLUSTER OF VERY STRONG..AND POTENTIALLY SEVERE..THUNDERSTORMS WERE
LOCATED ACROSS SOUTHEAST IOWA AND WERE MOVING SOUTHEAST AT 30 MPH AS
OF 330 AM.

THESE STORMS COULD MOVE ACROSS PORTIONS OF SCHUYLER..SCOTLAND AND
CLARK COUNTIES OF NORTHEAST MISSOURI BETWEEN 4 AND 6AM THIS MORNING
AND PRODUCE HIGH WINDS OR HAIL.

PERSONS IN THESE COUNTIES SHOULD KEEP ALERT AND LISTEN FOR POSSIBLE
WARNINGS.

FELDT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 4:06 AM CDT	Severe Thunderstorm Warning	LSX	Schuyler	69 min
May 24, 9:12 AM CDT	Severe Thunderstorm Warning	LSX	Adair, Knox	48 min
May 24, 10:09 AM CDT	Severe Thunderstorm Warning	LSX	Macon	51 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1989 Every severe thunderstorm warning in 1989

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.