Alert archive / Missouri / Flash Flood Warnings in 1992

Flash Flood Warning 7, NWS St. Louis, MO

July 25, 1992Knox County, Scotland County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 25, 1992, 9:32 PM CDT for Knox County, Scotland County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 25, 1992, 9:32 PM CDT (02:32 UTC)
Expired
Jul 26, 1992, 1:30 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Knox County, MO, Scotland County, MO

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 2.5 hours before the alert went out and 332 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, Topeka, KS at 00:00Z on 1992-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2513 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, Topeka, KS at 00:00Z on 1992-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 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
2513 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1263 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
325 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 260234
FFWSTL
MOC199-103-260630-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
932 PM CDT SAT JUL 25 1992
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  130 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST MISSOURI
 
   ...SCOTLAND COUNTY
   ...KNOX COUNTY
 
A FLASH FLOOD WARNING HAS BEEN ISSUED FOR SCOTLAND AND KNOX
COUNTIES IN NORTHEAST MISSOURI.
 
AT 925 PM CDT...KMEN RADIO IN MEMPHIS REPORTED WATER OVER
HIGHWAY 15 FROM MEMPHIS IN SCOTLAND COUNTY SOUTH TO NEAR
GREENSBURG IN NORTH KNOX COUNTY.
 
SEVERAL THUNDERSTORMS PRODUCING VERY HEAVY RAIN HAVE PASSED OVER
THIS AREA...WITH MORE THUNDERSTORMS ON THE WAY. MORE HEAVY RAIN
WILL WORSEN AN ALREADY DANGEROUS SITUATION.
 
A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE REST OF EXTREME ]
NORTHEAST MISSOURI FOR THE REST OF THE NIGHT.
 
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 UPJ TO HIGHER GROUND.
 
JPK/RP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 7:48 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis42 min
Jul 25, 8:04 PM CDTSevere Thunderstorm WarningLSXAdair41 min
Jul 25, 8:47 PM CDTSevere Thunderstorm WarningLSXKnox58 min

Nearby

Flash Flood Warnings in Missouri, 1992Every flash flood warning in 1992

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.