Alert archive / Missouri / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 27, NWS St. Louis, MO

April 27, 1989Scotland County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 1989, 7:05 PM CDT for Scotland County, Missouri. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1989, 7:05 PM CDT (00:05 UTC)
Expired
Apr 27, 1989, 8:00 PM CDT
In force
55 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County 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, 0.1 hours before the alert went out and 217 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 280003
SVRSTL
MOC199-280100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
705 PM CDT THU APR 27 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHEAST MISSOURI
          ...SCOTLAND
 
AT 655 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR THE
SCOTLAND CLARK COUNTY MISSOURI LINE. REPORTS OF GOLF BALL SIZE HAIL
HAVE BEEN RECEIVED. THIS THUNDERSTORM WAS MOVING TO THE SOUTHEAST
AROUND 15 MPH.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPHw...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
SCHROEDER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:43 PM CDTTornado WarningLSXClark47 min
Apr 27, 8:07 PM CDTSevere Thunderstorm WarningLSXScotland53 min
Apr 27, 8:33 PM CDTTornado WarningLSXClark42 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

Severe Thunderstorm Warnings in Missouri, 1989Every 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.