Alert archive / Missouri / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 29, NWS St. Louis, MO

April 27, 1989Lewis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 1989, 8:50 PM CDT for Lewis County, Missouri. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 27, 1989, 8:50 PM CDT (01:50 UTC)
Expired
Apr 27, 1989, 9:45 PM CDT
In force
55 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Lewis County, MO

The radar

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

What was reported inside it

TimeReportWhereRemark
Apr 27, 9:05 PM CDTHail 1Lewis, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 1.8 hours before the alert went out and 191 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 280147
SVRSTL
MOC111-280245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
850 PM CDT THU APR 27 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  945 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHEAST MISSOURI
          ...LEWIS
 
AT 845 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM ENTERING
NORTHERN LEWIS COUNTY. THIS STORM HAS A HISTORY OF LARGE HAIL...STRONG
WINDS...AND INTENSE LIGHTNING.
 
THE STORM WAS LOCATED ABOUT 35 MILES EAST NORTHEAST OF KIRKSVILLE.
THE STORM WAS MOVING TO THE SOUTH SOUTHEAST AROUND 15 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
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.

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, 8:33 PM CDTTornado WarningLSXClark42 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.