Alert archive / Missouri / Tornado Warnings in 1989

Tornado Warning 4, NWS St. Louis, MO

April 27, 1989Clark County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 27, 1989, 8:33 PM CDT for Clark County, Missouri. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1989, 8:33 PM CDT (01:33 UTC)
Expired
Apr 27, 1989, 9:15 PM CDT
In force
42 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Clark 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, 1.6 hours before the alert went out and 183 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, Peoria Regional, IL at 00:00Z on 1989-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1692 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, Peoria Regional, IL at 00:00Z on 1989-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.193958Sfc1 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
1692 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1202 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 280130
TORSTL
MOC045-280215-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
833 PM CDT THU APR 27 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  915 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHEAST MISSOURI
          ...CLARK
 
AT 830 PM CDT...TRAINED SPOTTERS REPORTED A WALL CLOUD WITH FUNNEL
CLOUDS NEAR FAIRMONT IN CLARK COUNTY OF NORTHEAST MISSOURI. NICKEL
SIZE HAIL WAS REPORTED NEAR LURAY IN CLARK COUNTY.
 
LURAY IS ABOUT 40 MILES NORTHEAST OF KIRKSVILLE.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
SCHROEDER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:05 PM CDTSevere Thunderstorm WarningLSXScotland55 min
Apr 27, 7:43 PM CDTTornado WarningLSXClark47 min
Apr 27, 8:07 PM CDTSevere Thunderstorm WarningLSXScotland53 min
Apr 27, 8:50 PM CDTSevere Thunderstorm WarningLSXLewis55 min
Apr 28, 4:07 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois38 min
Apr 28, 5:27 PM CDTSevere Thunderstorm WarningLSXCrawford33 min

Nearby

Tornado Warnings in Missouri, 1989Every tornado warning in 1989Tornadoes 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.