Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 15, NWS St. Louis, MO

April 24, 1993Franklin County, Saint Charles County, Warren County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 24, 1993, 9:22 PM CDT for Franklin County, Saint Charles County, Warren County, Missouri. It was in force for 38 min.

The area

The counties it named.

The facts

Issued: Apr 24, 1993, 9:22 PM CDT (02:22 UTC)
Expired: Apr 24, 1993, 10:00 PM CDT
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Franklin County, MO, Saint Charles County, MO, Warren County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.4 hours before the alert went out and 266 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: 158 J/kg
Mixed-layer CIN: -304 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 24, 7:50 PM CDT, 1 hour 32 minutes before

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Special weather statement, Apr 24, 7:54 PM CDT, 1 hour 28 minutes before

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Special weather statement, Apr 24, 8:19 PM CDT, 1 hour 3 minutes before

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Special weather statement, Apr 24, 8:40 PM CDT, 42 minutes before

MOZ012-250230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
834 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EAST CENTRAL
MISSOURI UNTIL MIDNIGHT...

AT 830 PM...SCATTERED THUNDERSTORMS HAD DEVELOPED 25 MILES WEST OF THE C
YST. LOUIS...IN WESTERN ST. LOUIS COUNTY.  THE STORMS WERE MOVING TO THE
NORTHEAST AT 35 MILES AN HOUR AND WILL MOVE ACROSS BALLWIN...AND INTO
THE FERGUSON AND FLORISSANT AREAS BETWEEN 9 AND 915 PM.

THESE STORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT DANGEROUS
LIGHTNING...AND SMALL HAIL AS THEY MOVE THROUGH ST. LOUIS
COUNTY.  FRANKLIN COUNTY OFFICALS REPORTED 1/2 INCH HAIL IN UNION AT
832PM.  TAKE SHELTER INSIDE AND STAY AWAY FROM WINDOWS UNTIL THE STORMS
PASS.

MORSE/FERRY

&

Special weather statement, Apr 24, 8:51 PM CDT, 31 minutes before

MOZ006-009-010-011-013-014-250245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
850 PM CDT SAT APR 24 1993

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MISSOURI UNTIL MIDNIGHT...

AT 845 PM VERY STRONG THUNDERSTORMS WERE IN CENTRAL MISSOURI IN A 5 MILE
WIDE BAND FROM ABOUT SEDALIA TO ABOUT 25 MILES SOUTH OF SEDALIA NEAR
WARSAW. OTHER VERY STRONG THUNDERSTORMS WERE 40 MILES EAST OF JEFFERSON
CITY NEAR HERMANN...AND ABOUT 30 MILES NORTHEAST OF COLUMBIA NEAR MEXICO.
THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 35 MILES AN HOUR AND
WILL LIKELY PRODUCE SMALL HAIL...NUMEROUS DEADLY CLOUD TO GROUND
LIGHTNING STRIKES...ALONG WITH TORRENTIAL RAIN THAT COULD REDUCE
VISIBILITIES TO NEAR ZERO WHILE DRIVING.

IF SEVERE WEATHER IS SPOTTED GET TO A SAFE PLACE IMMEDIATELY. GO TO THE
BASEMENT OR TO THE INTERIOR ROOM OF A HOUSE...AWAY FROM WINDOWS. WHEN
IT IS SAFE RELAY ANY SEVERE WEATHER REPORTS TO THE NEAREST LAW
ENFORCEMENT AGENCY SO IT CAN BE PASSED ALONG TO THE NATIONAL WEATHER
SERVICE. STAY TUNED TO NATIONAL WEATHER SERVICE RADIO OR COMMERCIAL
BROADCASTS FOR THE LATEST STATEMENTS OR WARNINGS ACROSS CENTRAL
MISSOURI TONIGHT.

LA GREE

Special weather statement, Apr 24, 9:20 PM CDT, 2 minutes before

MOZ011-012-250315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
914 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EAST CENTRAL
MISSOURI UNTIL MIDNIGHT...

AT 915 PM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 20 MILES NORTH
OF ST. LOUIS IN ST. CHARLES COUNTY TO 50 MILES WEST OF ST. LOUIS TO 55 M
ESOUTHWEST OF ST. LOUIS IN SOUTHWEST FRANKLIN COUNTY.  THE STORMS WERE
MOVING TO THE NORTHEAST AT 35 MILES AN HOUR.  THE STRONGEST STORM IN
THIS LINE WAS IN SOUTHERN WARREN COUNTY NEAR HOLSTEIN...OR 45 MILES WEST
OF ST. LOUIS.

THE STORMS WILL PRODUCE TORRENTIAL RAINS...GUSTY WINDS AND DANGEROUS
LIGHTNING IN FRANKLIN AND ST. CHARLES COUNTLY BETWEEN 930 AND 1030 PM.
STAY INSIDE AND AWAY FROM WINDOWS AND DO NOT USE THE TELEPHONE OR
ELECTRICAL APPLIANCES UNTIL THE STORMS PASS.

MORSE/FERRY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 7:23 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	26 min
Apr 24, 10:23 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis	37 min
Apr 24, 10:37 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	53 min
Apr 25, 12:28 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	35 min
Apr 25, 12:38 AM CDT	Severe Thunderstorm Warning	LSX	Dent, Reynolds	52 min
Apr 25, 12:41 AM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	49 min
Apr 25, 12:45 AM CDT	Severe Thunderstorm Warning	LSX	Washington	45 min
Apr 25, 12:59 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
Apr 25, 1:14 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson	33 min
Apr 24, 7:03 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene	57 min
Apr 25, 2:14 AM CDT	Severe Thunderstorm Warning	LSX	Perry	31 min

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.