Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 20, NWS St. Louis, MO

April 25, 1993Saint Francois County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 25, 1993, 12:41 AM CDT for Saint Francois County, Washington County, Missouri. It was in force for 49 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 25, 1993, 12:41 AM CDT (05:41 UTC)
Expired
Apr 25, 1993, 1:30 AM CDT
In force
49 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Saint Francois County, MO, Washington County, MO

What was reported inside it

TimeReportWhereRemark
Apr 25, 12:55 AM CDTTornado F1Potosi, MOA small tornado initially touched down near the intersection of Highway P and State Road 8, damaging a door and windows of a large garage. The tornado then traveled across a city park damaging several trees, sections of a chain-linked fence, and several adver

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

Paducah/Barkley, KY (KPAH), launched 00:00Z, 5.7 hours before the alert went out and 196 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 00:00Z on 1993-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 158 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 00:00Z on 1993-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 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
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, 9:50 PM CDT, 2 hours 51 minutes before
MOZ006-009-010-011-013-014-250245-

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

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

THUNDERSHOWERS..SOME WITH VERY HEAVY RAINS CONTINUED ACROSS CENTRAL
MISSOURI AT 940 PM CDT.  THE BROAD AREA OF GENERAL SHOWERS WAS SOUTH
OF A LINE FROM KANSAS CITY TO HANNIBAL AND COVERED ALL OF CENTRAL
MISSOURI.  THE HEAVIEST SHOWERS WERE IN AN AREA ABOUT 40 MILES IN
DIAMETER AND CENTERED OVER CALIFORNIA...ABOUT 20 MILES SOUTHWEST OF
COLUMBIA.  OTHER HEAVY SHOWERS WERE WIDELY SCATTERED FROM 40 MILES
NORTHWEST OF COLUMBIA..AROUND SALISBURY..TO CENTRALIA AND MEXICO..
ABOUT 25 MILES NORTHEAST OF COLUMBIA.

THE SHOWERS AND THUNDERSHOWERS WERE MOVING TO THE NORTHEAST AROUND
25 MILES AN HOUR.  NO SEVERE WEATHER WAS REPORTED OR INDICATED BY
RADAR IN CENTRAL MISSOURI THIS EVENING.
LB
Special weather statement, Apr 24, 9:55 PM CDT, 2 hours 46 minutes before
MOZALL-250430-

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

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHERN AND
CENTRAL MISSOURI UNTIL MIDNIGHT...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A SMALL PART OF EAST
CENTRAL MISSOURI UNTIL 100 AM CDT...
...A TORNADO WATCH IS ALSO IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
CENTRAL MISSOURI UNTIL 100 AM CDT...

AT 945 PM...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER MUCH OF
MISSOURI.  THE STRONGEST STORMS EXTENDED FROM WEST OF ST LOUIS INTO
CENTRAL MISSOURI...AND FROM THE SPRINGFIELD AREA SOUTHWEST INTO
NORTHERN ARKANSAS.  THESE STORMS WERE MOVING EAST TO NORTHEAST AT
35 MILES AN HOUR.

IF YOU LIVE IN SOUTHWEST OR SOUTH CENTRAL MISSOURI...REMAIN ALERT
FOR SEVERE THUNDERSTORMS AND POSSIBLE TORNADOES.  CONDITIONS REMAIN
FAVORABLE FOR THE DEVELOPMENT OF TORNADOES.  LARGE HAIL...FREQUENT
LIGHTNING AND VERY HEAVY RAIN ARE ALSO THREATS.  IF STORMS MOVE INTO
YOUR AREA...TAKE SHELTER AND LISTEN FOR POSSIBLE WARNINGS.

FOR RESIDENTS OF CENTRAL AND EAST CENTRAL MISSOURI...SEVERE THUNDERSTORMS
ARE STILL POSSIBLE THIS EVENING WHICH MAY PRODUCE LARGE HAIL AND DAMAGING
WIND.  IF A WARNING IS ISSUED FOR YOUR COUNTY OR AREA...STAY INDOORS AND
LISTEN FOR LATER STATEMENTS.

SEVERE THUDERSTORM WATCH #155 HAS BEEN DROPPED FOR THE IMMEDIATE KANSAS
CITY AND SEDALIA AREA...BUT REMAINS IN EFFECT EAST AND SOUTH OF THERE.

SHEAj
Special weather statement, Apr 24, 10:12 PM CDT, 2 hours 29 minutes before
MOZ012-250400-

SPECIAL WEATHER STATEMENT AND SHORT-RANGE FORECAST
NATIONAL WEATHER SERVICE ST LOUIS MO
1008 PM CDT SAT APR 24 1993

...STRONG THUNDERSTORMS CONTINUE WEST AND NORTH OF ST LOUIS...

AT 1006 PM...AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED
FROM ABOUT 15 MILES NORTH OF ST LOUIS DOWN INTO WESTERN ST LOUIS
COUNTY.  MOVEMENT OF THESE WAS NORTHEAST AT 35 MILES AN HOUR.

CITIES AND COMMUNITIES WEST AND NORTH OF ST LOUIS CITY CAN EXPECT
THUNDERSTORMS WITH VERY HEAVY RAIN...FREQUENT LIGHTNING AND SMALL HAIL
THROUGH 1130 PM.

IF YOU ARE DRIVING...VISIBILITIES MAY BE REDUCED TO A FEW YARDS IN AREAS
OF HEAVY RAIN.  WHEN A STORM MOVES INTO YOUR AREA...REMAIN INDOORS AND
KEEP INFORMED OF THE LATEST WEATHER CONDITIONS IN CASE A WARNING IS
ISSUED.  LISTEN FOR NOAA WEATHER RADIO FOR WEATHER INFORMATION.

SHEA
Special weather statement, Apr 24, 11:15 PM CDT, 1 hour 26 minutes before
MOZ006-009-010-011-013-014-250530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
1115 PM CDT SAT APR 24 1993

...THE SEVERE THUNDERSTORM WATCH FOR CENTRAL MISSOURI IS NO LONGER
IN EFFECT...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR EASTERN
AND SOUTHEASTERN MISSOURI...

AT 1110 PM A BROAD AREA OF SHOWERS AND VERY STRONG THUNDERSTORMS COVERED
A LARGE PORTION OF CENTRAL MISSOURI.  THE STRONGEST STORMS WERE LOCATED
IN A NARROW LINE THAT EXTENDED FROM SPRINGFIELD...TO 40 MILES SOUTHEAST
OF COLUMBIA.  THE STORMS WERE MOVING NORTHEAST AT 30 MPH.

NO SEVERE WEATHER REPORTS HAVE BEEN REPORTED IN CENTRAL MISSOURI...BUT
FREQUENT AND DANGEROUS LIGHTNING ALONG WITH VERY HEAVY RAINS HAVE BEEN
REPORTED THROUGHOUT THE REGION.  REPORTS OF FLOODING WERE LOCALIZED AND
LIMITED TO URBAN AREAS AND SMALL STREAMS.

PERIODS OF SHOWERS  AND THUNDERSTORMS WILL CONTINUE OVER MID MISSOURI
FOR MOST OF THE NIGHT ADDING TO THE THREAT OF FLOODING.  PERSONS LIVING
IN AREAS NORMALLY PRONE TO FLOODING SHOULD BE ON THE ALERT FOR RAPIDLY
RISING WATER AND LISTEN TO WEATHER RADIO FOR LATER STATEMENTS OR
POSSIBLE WARNINGS.

PERLOW
Special weather statement, Apr 24, 11:19 PM CDT, 1 hour 22 minutes before
MOZALL-250530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1118 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR PORTIONS OF
SOUTHERN AND EASTERN MISSOURI UNTIL 5 AM...

THIS WATCH INCLUDES THE CITIES ST LOUIS...ST CHARLES...
CAPE GIRARDEAU...POPLAR BLUFF...ROLLA...WEST PLAINS AND
FARMINGTON.

THIS WAS REPLACES SEVERE THUNDERSTORM WATCH NUMBER 155 THAT WAS
TO EXPIRE AT MIDNIGHT.

A TORNADO WATCH FOR SOUTHWEST MISSOURI REMAINS IN EFFECT
UNTIL 1 AM.

AT 1115 PM...THUNDERSTORMS WERE OCCURRING FROM WEST CENTRAL ILLINOIS
ACROSS EAST CENTRAL MISSOURI INTO SOUTHWEST MISSOURI.  SOME OF THESE
STORMS COULD REACH SEVERE LIMITS.

PEOPLE IN THE WATCH AREA SHOULD CONTINUE TO MONITOR THE LATEST
WEATHER CONDITIONS BY LISTENING TO NOAA WEATHER RADIO...OR LOCAL
RADIO AND T.V. STATIONS.

FERRY
Special weather statement, Apr 25, 12:25 AM CDT, 16 minutes before
MOZ007-011-012-017-018-ILZ011-013-250630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1223 AM CDT SUN APR 25 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR EASTERN AND
SOUTHERN MISSOURI UNTIL 5AM...

SHOWERS AND THUNDERSTORMS WILL CONTINUE IN EASTERN AND SOUTHERN MISSOURI
AND WESTERN ILLINOIS OVERNIGHT.  AT 1210 AM...A LINE OF STRONG
THUNDERSTORMS EXTENDED FROM 45 MILES NORTHEAST OF ST LOUIS...TO THE
CITY OF ST. CHARLES...TO NEAR ROLLA.  THE STORMS WERE MOVING TO THE
NORTHEAST AT 35 MILES AN HOUR.

THE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAINS...DANGEROUS LIGHTNING
AND STRONG GUSTY WINDS.  AN URBAN AND SMALL STREAM FLOOD ADVISORY IS
ALSO IN EFFECT FOR EAST CENTRAL MISSOURI.  THE HEAVY RAIN WILL CAUSE
PONDING OF WATER ON ROADS.

MOTOTRISTS SHOULD USE CAUTION WHEN DRIVING IN EASTERN AND SOUTHERN
MISSOURI TONIGHT.  IF STORMS ARE IN YOUR AREA TAKE SHELTER INSIDE AND
STAY AWAY FROM WINDOWS.

MORSE

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 7:23 PM CDTSevere Thunderstorm WarningLSXLincoln26 min
Apr 24, 9:22 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Warren38 min
Apr 24, 10:23 PM CDTSevere Thunderstorm WarningLSXSaint Louis37 min
Apr 24, 10:37 PM CDTSevere Thunderstorm WarningLSXSaint Charles53 min
Apr 25, 12:28 AM CDTSevere Thunderstorm WarningLSXCrawford35 min
Apr 25, 12:38 AM CDTSevere Thunderstorm WarningLSXDent, Reynolds52 min
Apr 25, 12:45 AM CDTSevere Thunderstorm WarningLSXWashington45 min
Apr 25, 12:59 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve46 min
Apr 25, 1:14 AM CDTSevere Thunderstorm WarningLSXJefferson33 min
Apr 24, 7:03 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene57 min
Apr 25, 2:14 AM CDTSevere Thunderstorm WarningLSXPerry31 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1993Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.