Alert archive / Missouri / Flash Flood Warnings in 1993

Flash Flood Warning 59, NWS St. Louis, MO

August 12, 1993Franklin County, Missouri

NWS St. Louis, MO issued this flash flood warning at Aug 12, 1993, 4:40 AM CDT for Franklin County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Aug 12, 1993, 4:40 AM CDT (09:40 UTC)
Expired
Aug 12, 1993, 8:45 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Franklin County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 9.7 hours before the alert went out and 257 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 1993-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1993-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
42 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 120941
FFWSTL
MOC071-121345-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
440 AM CDT THU AUG 12 1993
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  845 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...FRANKLIN COUNTY
 
AT 440 AM...ANOTHER ROUND OF HEAVY RAIN WAS MOVING ACROSS FRANKLIN
COUNTY MISSOURI...WHICH IS SOME 30 TO 60 MILES SOUTHWEST OF ST LOUIS.
 
RADAR INDICATES THAT SEVERAL THUNDERSTORMS WITH HEAVY RAIN WILL BE
PASSING OVER FRANKLIN COUNTY DURING THE NEXT FEW HOURS. SINCE THIS AREA
WAS HIT BY HEAVY RAINS AND FLOODING LATE WEDNESDAY EVENING...THE
ADDITIONAL RAINS OF THIS MORNING WILL ALMOST CERTAINLY PRODUCE FLOODING
ONCE AGAIN.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.
 
TRUETT

What forecasters said that day

The local office's own words before this flash flood 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, Aug 12, 12:10 AM CDT, 4 hours 30 minutes before
MOZ006-009-010-011-013-014-120600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
1210 AM CDT THU AUG 12 1993

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT...

AT 1210 AM STRONG THUNDERSTORMS WERE LOCATED FROM 20 MILES
NORTHEAST OF MOBERLY TO MARSHALL TO 15 MILES NORTHWEST OF SEDALIA.
THE THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND WILL AFFECT
MOBERLY...GLASGOW...AND MARSHALL THROUGH 100 AM.  THE THUNDERSTORMS
WILL ALSO REACH HIGBEE AND FAYETTE BY 100 AM.  OTHER STRONG
THUNDERSTORMS WERE LOCATED JUST NORTH OF COLUMBIA AND OVER KINGDOM CITY

ANY OF THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT
CLOUD TO GROUND LIGHTNING...BRIEF GUSTY WINDS...AND POSSIBLY SMALL
HAIL.  MOTORISTS SHOULD BE PARTICULARLY CAREFULL AS LOW LYING ROADS
MAY FLOOD RAPIDLY.  REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT
AGENCY.
           KENNEDY
Special weather statement, Aug 12, 12:12 AM CDT, 4 hours 28 minutes before
MOZ006-009-010-011-013-014-120600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
1210 AM CDT THU AUG 12 1993

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT...

AT 1210 AM STRONG THUNDERSTORMS WERE LOCATED FROM 20 MILES
NORTHEAST OF MOBERLY TO MARSHALL TO 15 MILES NORTHWEST OF SEDALIA.
THE THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND WILL AFFECT
MOBERLY...GLASGOW...AND MARSHALL THROUGH 100 AM.  THE THUNDERSTORMS
WILL ALSO REACH HIGBEE AND FAYETTE BY 100 AM.  OTHER STRONG
THUNDERSTORMS WERE LOCATED JUST NORTH OF COLUMBIA AND OVER KINGDOM CITY

ANY OF THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT
CLOUD TO GROUND LIGHTNING...BRIEF GUSTY WINDS...AND POSSIBLY SMALL
HAIL.  MOTORISTS SHOULD BE PARTICULARLY CAREFULL AS LOW LYING ROADS
MAY FLOOD RAPIDLY.  REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT
AGENCY.
           KENNEDY
Special weather statement, Aug 12, 1:10 AM CDT, 3 hours 30 minutes before
MOZ006-009-010-011-013-014-120700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
110 AM CDT THU AUG 12 1993

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT...

AT 110 AM STRONG THUNDERSTORMS STRETCHED FROM COLUMBIA TO 25 MILES
SOUTHWEST OF COLUMBIA NEAR BUNCETON.  THE THUNDERSTORMS WERE MOVING
SOUTHEAST AT 30 MPH AND WILL CONTINUE TO AFFECT COLUMBIA...BUNCETON...
AND PRAIRIE HOME THROUGH 130 AM.  THE THUNDERSTORMS SHOULD REACH
FULTON AND HARTSBURG BY 200 AM.

VERY HEAVY RAIN...FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF GUSTY
WINDS CAN BE EXPECTED FROM THESE THUNDERSTORMS.  FLOODING OF LOW LYING
URBAN AREAS AND LOW BRIDGES IS ALSO POSSIBLE.  REPORT ANY FLOODING TO
THE NEAREST LAW ENFORCEMENT AGENCY.

KENNEDY
Special weather statement, Aug 12, 1:10 AM CDT, 3 hours 30 minutes before
MOZ003-007-120815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
110 AM CDT THU AUG 12 1993

...INTENSE THUNDERSTORMS MOVING ACROSS NORTHEAST MISSOURI...

AT 105 AM...WEATHER SERVICE RADAR INDICATED A CLUSTER OF INTENSE
THUNDERSTORMS MOVING ACROSS NORTHEAST MISSOURI.  THESE STORMS STRETCHED
FROM NEAR KIRKSVILLE...EAST TO THE MISSISSIPPI RIVER NEAR GREGORY
LANDING.

THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR.  MOST OF THE STORMS
WERE PRODUCING TORRENTIAL RAINS...AND SOME OF THE STRONGER STORMS WERE
ALSO PRODUCING WINDS OF 40 TO 50 MILES AN HOUR.  SOME STREET FLOODING
HAS BEEN REPORTED IN THE KIRKSVILLE AREA.

PEOPLE IN SCHUYLER...SCOTLAND...CLARK....ADAIR...KNOX....AND LEWIS
COUNTIES CAN EXPECT INTENSE THUNDERSTORMS TO CONTINUE THROUGH AT LEAST 2
OR 3 AM THIS MORNING...WITH STRONG WIND GUSTS...HEAVY RAINS...AND FREQUE
LIGHTNING.

ALSO REMEMBER THAT A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHEAST
MISSOURI.  THIS IS A POTENTIALLY DANGEROUS SITUATION...AND THOSE LIVING
IN FLOOD PRONE OR LOW LYING AREAS SHOULD CAREFULLY MONITOR WEATHER
DEVELOPMENTS OVER THE NEXT FEW HOURS.

IF FLOODING IS OBSERVED OR A WARNING IS ISSUED...LEAVE PERSONAL
BELONGINGS AND MOVE TO HIGHER GROUND AT ONCE.

REPORT ANY FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY...AND ASK THEM
TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

TRUETT

&
Special weather statement, Aug 12, 1:11 AM CDT, 3 hours 29 minutes before
MOZ003-007-120815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
110 AM CDT THU AUG 12 1993

...INTENSE THUNDERSTORMS MOVING ACROSS NORTHEAST MISSOURI...

AT 105 AM...WEATHER SERVICE RADAR INDICATED A CLUSTER OF INTENSE
THUNDERSTORMS MOVING ACROSS NORTHEAST MISSOURI.  THESE STORMS STRETCHED
FROM NEAR KIRKSVILLE...EAST TO THE MISSISSIPPI RIVER NEAR GREGORY
LANDING.

THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR.  MOST OF THE STORMS
WERE PRODUCING TORRENTIAL RAINS...AND SOME OF THE STRONGER STORMS WERE
ALSO PRODUCING WINDS OF 40 TO 50 MILES AN HOUR.  SOME STREET FLOODING
HAS BEEN REPORTED IN THE KIRKSVILLE AREA.

PEOPLE IN SCHUYLER...SCOTLAND...CLARK....ADAIR...KNOX....AND LEWIS
COUNTIES CAN EXPECT INTENSE THUNDERSTORMS TO CONTINUE THROUGH AT LEAST 2
OR 3 AM THIS MORNING...WITH STRONG WIND GUSTS...HEAVY RAINS...AND FREQUE
LIGHTNING.

ALSO REMEMBER THAT A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHEAST
MISSOURI.  THIS IS A POTENTIALLY DANGEROUS SITUATION...AND THOSE LIVING
IN FLOOD PRONE OR LOW LYING AREAS SHOULD CAREFULLY MONITOR WEATHER
DEVELOPMENTS OVER THE NEXT FEW HOURS.

IF FLOODING IS OBSERVED OR A WARNING IS ISSUED...LEAVE PERSONAL
BELONGINGS AND MOVE TO HIGHER GROUND AT ONCE.

REPORT ANY FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY...AND ASK THEM
TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

TRUETT

&
Special weather statement, Aug 12, 1:15 AM CDT, 3 hours 25 minutes before
MOZ006-009-010-011-013-014-120700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
110 AM CDT THU AUG 12 1993

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT...

AT 110 AM STRONG THUNDERSTORMS STRETCHED FROM COLUMBIA TO 25 MILES
SOUTHWEST OF COLUMBIA NEAR BUNCETON.  THE THUNDERSTORMS WERE MOVING
SOUTHEAST AT 30 MPH AND WILL CONTINUE TO AFFECT COLUMBIA...BUNCETON...
AND PRAIRIE HOME THROUGH 130 AM.  THE THUNDERSTORMS SHOULD REACH
FULTON AND HARTSBURG BY 200 AM.

VERY HEAVY RAIN...FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF GUSTY
WINDS CAN BE EXPECTED FROM THESE THUNDERSTORMS.  FLOODING OF LOW LYING
URBAN AREAS AND LOW BRIDGES IS ALSO POSSIBLE.  REPORT ANY FLOODING TO
THE NEAREST LAW ENFORCEMENT AGENCY.

KENNEDY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 11:05 PM CDTFlash Flood WarningLSXFranklin4 hr
Aug 11, 11:25 PM CDTFlash Flood WarningLSXSaint Charles97 min
Aug 12, 6:33 AM CDTFlash Flood WarningLSXCrawford3 hr
Aug 12, 6:48 AM CDTFlash Flood WarningLSXJefferson, Saint Louis2 hr

Nearby

Flash Flood Warnings in Missouri, 1993Every flash flood 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.