Alert archive / Missouri / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 20, NWS St. Louis, MO

April 20, 1992Lincoln County, Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 20, 1992, 3:54 PM CDT for Lincoln County, Saint Charles County, Missouri. It was in force for 51 min.

The area

The counties it named.

The facts

Issued
Apr 20, 1992, 3:54 PM CDT (20:54 UTC)
Expired
Apr 20, 1992, 4:45 PM CDT
In force
51 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Lincoln County, MO, Saint Charles County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 8.9 hours before the alert went out and 277 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, Paducah/Barkley, KY at 12:00Z on 1992-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 515 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, Paducah/Barkley, KY at 12:00Z on 1992-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
515 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
607 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 202056
SVRSTL
MOC113-183-202145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
354 PM CDT MON APR 20 1992
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  445 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...EASTERN LINCOLN COUNTY...ST CHARLES COUNTY
 
AT 354 PM...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS MOVING INTO
LINCOLN COUNTY AND ACROSS ST CHARLES COUNTY. THESE STORMS EXTEND FROM 45
MILES NORTHWEST OF ST LOUIS...NEAR BOWLING GREEN...TO 30 MILES WEST OF
ST LOUIS. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.
 
THE CITIES OF O'FALLON...ELSEBERRY AND WINFIELD ARE IN THE PATH OF THESE
STORMS.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
SHEA/GLASS

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, Apr 20, 1:28 PM CDT, 2 hours 26 minutes before
MOZALL-201900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
115 PM CDT MON APR 20 1992

...MORE RAIN FOR CENTRAL MISSOURI...

AT 1 PM A BAND OF SHOWERS...SOME OF THEM HEAVY...EXTENDED FROM 50 MILES
WEST OF KIRKSVILLE...TO COLUMBIA...TO 50 MILES EAST OF SPRINGFIELD.
THE HEAVIEST SHOWERS WERE LOCATED IN A NARROW LINE THAT EXTENDED FROM
15 MILES WEST OF COLUMBIA...TO 25 MILES WEST OF ROLLA.  THE SHOWERS
WERE MOVING NORTHEAST AT 25 MPH.

THESE BRIEF...BUT SOMETIMES HEAVY SHOWERS...FALLING ON ALREADY SATURATED
GROUND...WILL RESULT IN RUNOFF...ALLOWING CREEKS AND SMALL STREAMS TO
OVERFLOW THEIR BANKS.  RESIDENTS OF CENTRAL MISSOURI LIVING IN AREAS
THAT ARE PRONE TO FLOODING SHOULD BE ON THE ALERT FOR RISING WATERS
AND BE PREPARED TO MOVE TO HIGHER GROUND.  NEVER ATTEMPT TO CROSS LOW
WATER BRIDGES OR ROADWAYS UNDER WATER.
.
STAY TUNED TO WEATHER RADIO FOR FURTHER UPDATES.

PERLOW
Special weather statement, Apr 20, 3:11 PM CDT, 43 minutes before
MOZALL-202115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
308 PM CDT MON APR 20 1992

...A TORNADO WATCH IS IN EFFECT FOR PARTS OF NORTHEAST AND EAST CENTRAL
MISSOURI UNTIL 1000 PM CDT THIS MONDAY AFTERNOON AND EVENING...
...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE AFTERNOON AND EVENING
HOURS FOR EAST CENTRAL AND SOUTHEAST MISSOURI...

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR PARTS OF
NORTHEAST AND EAST CENTRAL MISSOURI.  THIS MEANS CONDITIONS ARE RIGHT
FOR THE DEVELOPMENT OF THUNDERSTORMS WHICH COULD PRODUCE TORNADOES.

AT 305 PM THUNDERSTORMS WERE DEVELOPING RAPIDLY FROM NORTH OF
COLUMBIA...TO ABOUT 30 MILES WEST OF ST LOUIS AND DOWN INTO THE
SOUTHEAST PART OF THE STATE.  MOVEMENT WAS NORTH AT 35 MILES AN HOUR.

IF YOU LIVE IN NORTHEAST OR EAST CENTRAL MISSOURI...KEEP INFORMED OF THE
LATEST WEATHER INFORMATION.  WHEN STORMS APPROACH YOUR AREA...MOVE
INDOORS AND TAKE SHELTER IF A TORNADO IS SPOTTED OR REPORTED.  LISTEN TO
NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.

IN ADDITION...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR EAST CENTRAL AND
SOUTHEAST MISSOURI THIS AFTERNOON AND EVENING.  BE PREPARED TO MOVE
QUICKLY KIF FLASH FLOODING IS REPORTED OR OBSERVED.  STAY ON HIGH GROUND.

SHEA
Special weather statement, Apr 20, 3:31 PM CDT, 23 minutes before
MOZ011-012-202130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
329 PM CDT MON APR 20 1992

...STRONG THUNDERSTORMS MOVE INTO EAST CENTRAL MISSOURI...

AT 327 PM...THUNDERSTORMS WITH VERY HEAVY RAIN WERE MOVING INTO EXTREME
WEST ST CHARLES COUNTY.  ONE STRONG STORM WAS OVER THE NORTHWEST
CORNER...JUST NORTHWEST OF WENTZVILLE WHILE ANOTHER STORM WAS MOVING
INTO THE SOUTHWEST SECTION OF THE COUNTY.

MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.  THESE STORMS SHOULD PASS
THROUGH THE WENTZVILLE AREA BY 345 PM...AND MOST OF ST CHARLES COUNTY BY
400 PM.  MOVE INDOORS WHEN STORMS APPROACH.  REMEMBER...THUNDERSTORMS DO
OCCASIONALLY PRODUCE TORNADOES.

STAY TUNED TO NOAA WEATZHER RADIO OR YOUR LOCAL RADIO AND TELEVISION
STATIONS FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS.

SHEA

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 7:10 PM CDTSevere Thunderstorm WarningLSXMarion41 min
Apr 20, 12:32 AM CDTFlash Flood WarningLSXCrawford, Iron, Washington6 hr
Apr 20, 12:32 AM CDTFlash Flood WarningLSXDent, Reynolds6 hr
Apr 20, 2:49 AM CDTFlash Flood WarningLSXMadison5 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 1992Every severe thunderstorm warning in 1992

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.