Alert archive / Missouri / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 86, NWS St. Louis, MO

August 29, 1990Clark County, Scotland County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 29, 1990, 2:16 AM CDT for Clark County, Scotland County, Missouri. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Aug 29, 1990, 2:16 AM CDT (07:16 UTC)
Expired
Aug 29, 1990, 3:15 AM CDT
In force
59 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

Topeka, KS (KTOP), launched 00:00Z, 7.3 hours before the alert went out and 354 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, Topeka, KS at 00:00Z on 1990-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3134 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, Topeka, KS at 00:00Z on 1990-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
3134 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
2146 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
301 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 290718
SVRSTL
MOC045-199-290815-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
216 AM CDT WED AUG 29 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST MISSOURI
          ...CLARK...NORTHEASTERN SCOTLAND
 
WEATHER SERVICE RADAR INDICATES A SEVERE THUNDERSTORM IN SOUTHEAST
IOWA...ABOUT 40 MILES NORTHEAST OF KIRKSVILLE MISSOURI. THE SEVERE
THUNDERSTORM WAS MOVING SOUTHEAST AT 40 MPH.
 
THE SEVERE THUNDERSTORM IS EXPECTED TO AFFECT NORTHEAST SCOTLAND AND
CLARK COUNTIES IN MISSOURI BETWEEN 215 AM AND 315 AM CDT THIS MORNING.
 
 
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.
SLAUGHTER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 5:28 AM CDTSevere Thunderstorm WarningLSXLewis, Marion62 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1990Every severe thunderstorm warning in 1990

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.