Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 124, NWS St. Louis, MO

July 20, 1993Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 20, 1993, 6:20 PM CDT for Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: Jul 20, 1993, 6:20 PM CDT (23:20 UTC)
Expired: Jul 20, 1993, 7:15 PM CDT
In force: 55 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Saint Francois County, MO, Sainte Genevieve County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.3 hours before the alert went out and 168 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1217 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 202320
SVRSTL
ILC157-MOC187-186-210015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
620 PM CDT TUE JUL 20 1993
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ILLINOIS
 
   ...RANDOLPH COUNTY
 
 
IN EAST CENTRAL MISSOURI
 
   ...ST FRANCOIS COUNTY...STE GENEVIEVE COUNTY
 
AT 615 PM...A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM 30 MILES
SOUTHEAST OF ST LOUIS TO NEAR FLAT RIVER...5 MILES NORTHWEST OF
FARMINGTON. MOVEMENT OF THESE STORMS WAS EAST AT 25 MILES AN HOUR. THE
COMMUNITIES OF FARMINGTON...STE GENEVIEVE...RED BUD AND PRAIRIE DU
ROCHER ARE IN THE PATH OF THESE STORMS. YOU CAN EXPECT SEVERE WEATHER BY
645 PM.
 
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.
 
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.
 
SHEA

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, Jul 20, 5:10 PM CDT, 1 hour 10 minutes before

MOZ010-011-014-202300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
510 PM CDT TUE JUL 20 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 900 PM CDT
FOR THE EAST AND SOUTH SECTIONS OF CENTRAL MISSOURI...

AT 505 PM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY
SHOWERS OVER EAST AND SOUTH MISSOURI.  THE BAND WAS ABOUT 25 MILES WIDE
AND EAST OF A LINE EXTENDING FROM 55 MILES EAST OF COLUMBIA TO 55 MILES
SOUTHEAST OF COLUMBIA...AROUND SULLIVAN...TO JUST SOUTH OF FT. LEONARD
WOOD.  THE THUNDERSTORMS WERE MOVING TO THE EAST AND SOUTHEAST AROUND
25 MILES AN HOUR AND NO LONGER PRESENT A THREAT OF SEVERE WEATHER TO
CENTRAL MISSOURI.

NO SEVERE WEATHER WAS REPORTED OR INDICATED BY RADAR IN CENTRAL
MISSOURI DURING THE LAST HOUR.

LB/GS

Special weather statement, Jul 20, 5:10 PM CDT, 1 hour 10 minutes before

MOZ010-011-014-202300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
510 PM CDT TUE JUL 20 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 900 PM CDT
FOR THE EAST AND SOUTH SECTIONS OF CENTRAL MISSOURI...

AT 505 PM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY
SHOWERS OVER EAST AND SOUTH MISSOURI.  THE BAND WAS ABOUT 25 MILES WIDE
AND EAST OF A LINE EXTENDING FROM 55 MILES EAST OF COLUMBIA TO 55 MILES
SOUTHEAST OF COLUMBIA...AROUND SULLIVAN...TO JUST SOUTH OF FT. LEONARD
WOOD.  THE THUNDERSTORMS WERE MOVING TO THE EAST AND SOUTHEAST AROUND
25 MILES AN HOUR AND NO LONGER PRESENT A THREAT OF SEVERE WEATHER TO
CENTRAL MISSOURI.

NO SEVERE WEATHER WAS REPORTED OR INDICATED BY RADAR IN CENTRAL
MISSOURI DURING THE LAST HOUR.

LB/GS

Local storm report, Jul 20, 5:23 PM CDT, 57 minutes before

MOZ010-011-014-210000-

PRELIMINARY STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA MO
530 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TBREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
LB

Local storm report, Jul 20, 5:30 PM CDT, 50 minutes before

MOZ010-011-014-210000-

PRELIMINARY STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA MO
530 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
LB

Local storm report, Jul 20, 5:40 PM CDT, 40 minutes before

MOZ010-011-014-210000-

PRELIMINARY STORM REPORT...CORRECTED TO ADD INFO.
NATIONAL WEATHER SERVICE COLUMBIA MO
540 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
245 PM       S. MILLER    NUMEROUS TREES DOWN...2 TO 3 FOOT DIAMETER
                          TREE FELL ON HOUSE IN IBERIA.  TIME IS
APPROXIMATE.

LB

Local storm report, Jul 20, 5:42 PM CDT, 38 minutes before

MOZ010-011-014-210000-

PRELIMINARY STORM REPORT...CORRECTED TO ADD INFO.
NATIONAL WEATHER SERVICE COLUMBIA MO
540 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
245 PM       S. MILLER    NUMEROUS TREES DOWN...2 TO 3 FOOT DIAMETER
                          TREE FELL ON HOUSE IN IBERIA.  TIME IS
APPROXIMATE.

LB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Ralls	49 min
Jul 20, 3:26 PM CDT	Severe Thunderstorm Warning	LSX	Pike	64 min
Jul 20, 4:08 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	52 min
Jul 20, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	57 min
Jul 20, 4:41 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	64 min
Jul 20, 5:07 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	53 min
Jul 20, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	55 min
Jul 20, 5:40 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	65 min
Jul 20, 5:45 PM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis	2 hr
Jul 20, 5:45 PM CDT	Flash Flood Warning	LSX	City of Saint Louis	2 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 1993 Every severe thunderstorm warning in 1993

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.