Alert archive / Missouri / Flash Flood Warnings in 1993

Flash Flood Warning 41, NWS St. Louis, MO

July 13, 1993Marion County, Shelby County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 13, 1993, 1:13 PM CDT for Marion County, Shelby County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 13, 1993, 1:13 PM CDT (18:13 UTC)
Expired
Jul 13, 1993, 5:00 PM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Marion County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 159 km from the middle of the area, began a volume at 18:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Springfield, MO (KUMN), launched 12:00Z, 6.2 hours before the alert went out and 365 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, Springfield, MO at 12:00Z on 1993-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 854 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, Springfield, MO at 12:00Z on 1993-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 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
854 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 131814
FFWSTL
MOC127-205-132200-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
113 PM CDT TUE JUL 13 1993
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 500 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST MISSOURI
 
   ...MARION COUNTY...SHELBY COUNTY
 
AT 100 PM...RADAR INDICATED AN AREA OF THUNDERSTORMS WITH VERY HEAVY
RAIN MOVING THROUGH NORTHEAST MISSOURI. THE HEAVIEST RAIN WAS OVER
EASTERN SHELBY COUNTY...30 MILES NORTHWEST OF HANNIBAL. MOVEMENT WAS
EAST AT 25 TO 30 MILES AN HOUR. THESE STORMS WILL AFFECT SHELBYVILLE...
PALMYRA AND HANNIBAL THIS AFTERNOON.
 
THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN AND FLASH FLOODING AS
THEY PASS THROUGH THE AREA. AS MUCH AS TWO INCHES IN A HALF HOUR HAVE
BEEN REPORTED AS THESE STORMS MOVED THROUGH THE KIRKSVILLE REGION. THIS
WILL CAUSE FLASH FLOODING AND MAY CAUSE ROADS TO FLOOD OVER.  SEVERAL
INCHES OF RAIN ARE POSSIBLE DURING THE AFTERNOON SO MOVE TO HIGH GROUND
AND STAY AWAY FROM SWOLLEN CREEKS.
 
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.
 
SHEA

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, Jul 13, 8:10 AM CDT, 5 hours 3 minutes before
MOZALL-141200-

MISSOURI SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
810 AM CDT TUE JUL 13 1993

A WEATHER SYSTEM IN THE PLAINS WILL PRODUCE SCATTERED THUNDERSTORMS
IN MISSOURI THIS AFTERNOON AND TONIGHT.  THERE WILL BE A SLIGHT CHANCE
OF SEVERE THUNDERSTORMS OVER MUCH OF NORTHERN AND WESTERN MISSOURI.
THAT AREA IS GENERALLY TO THE NORTH OF A LINE FROM JOPLIN TO ST LOUIS.

STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE
LATEST FORECAST FOR POSSIBLE SKYWARN ACTION THIS AFTERNOON.

TUCKER
Special weather statement, Jul 13, 8:14 AM CDT, 4 hours 59 minutes before
MOZALL-141200-

MISSOURI SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
810 AM CDT TUE JUL 13 1993

A WEATHER SYSTEM IN THE PLAINS WILL PRODUCE SCATTERED THUNDERSTORMS
IN MISSOURI THIS AFTERNOON AND TONIGHT.  THERE WILL BE A SLIGHT CHANCE
OF SEVERE THUNDERSTORMS OVER MUCH OF NORTHERN AND WESTERN MISSOURI.
THAT AREA IS GENERALLY TO THE NORTH OF A LINE FROM JOPLIN TO ST LOUIS.

STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVIJSED OF THE
LATEST FORECAST FOR POSSIBLE SKYWARN ACTION THIS AFTERNOON.

TUCKER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 11:45 AM CDTFlash Flood WarningLSXAdair3 hr
Jul 13, 3:39 PM CDTSevere Thunderstorm WarningLSXRalls51 min
Jul 13, 6:30 PM CDTSevere Thunderstorm WarningLSXSaint Louis45 min
Jul 13, 6:30 PM CDTSevere Thunderstorm WarningLSXSaint Charles23 min
Jul 13, 6:42 PM CDTSevere Thunderstorm WarningLSXCity of Saint Louis48 min

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; radar from the NEXRAD Level II archive.