Alert archive / Missouri / Flash Flood Warnings in 1994

Flash Flood Warning 2, NWS St. Louis, MO

April 11, 1994Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 11, 1994, 6:08 AM CDT for Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Apr 11, 1994, 6:08 AM CDT (11:08 UTC)
Expired
Apr 11, 1994, 12:15 PM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Jefferson County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 11:10 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

Paducah/Barkley, KY (KPAH), launched 00:00Z, 11.1 hours before the alert went out and 181 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 1994-04-11Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Paducah/Barkley, KY at 00:00Z on 1994-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
139 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 111111
FFWSTL
MOC055-099-161-187-186-221-111715-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
608 AM CDT MON APR 11 1994
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...CRAWFORD COUNTY...JEFFERSON COUNTY...PHELPS COUNTY
   ...ST FRANCOIS COUNTY...STE GENEVIEVE COUNTY...WASHINGTON COUNTY
 
AT 6 AM...FLOODING CONTINUED OVER PORTIONS OF SOUTHEAST MISSOURI
BETWEEN ROLLA AND STE GENEVIEVE. NUMEROUS ROADS ARE CLOSED IN THESE
AREAS...AND MANY CREEKS AND STREAMS WERE OUT OF THEIR BANKS.
 
RAINFALL ESTIMATES FROM RADAR SUGGEST THAT 1 TO 2 INCHES OF RAIN FELL
OVER THESE AREAS DURING THE NIGHT...AND THIS IS IN ADDITION TO
THE HEAVY RAINS THAT OCCURRED SATURDAY NIGHT AND EARLY SUNDAY.
 
NATIONAL WEATHER SERVICE RADAR INDICATES THAT SCATTERED THUNDERSTORMS WI
HEAVY RAINS WILL CONTINUE OVER SOUTHEAST MISSOURI FOR THE NEXT FEW
HOURS.  THESE RAINS WILL BE CAUSING ADDITIONAL FLOODING PROBLEMS.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTREMPT 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.
 
&
TRUETT/GLASS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 1:18 AM CDTFlash Flood WarningLSXJefferson, Sainte Genevieve, Saint Francois, Washington5 hr
Apr 11, 6:08 AM CDTFlash Flood WarningLSXCrawford, Washington6 hr
Apr 11, 6:08 AM CDTFlash Flood WarningLSXPhelps6 hr
Apr 11, 7:13 AM CDTFlash Flood WarningLSXPike, Ralls6 hr
Apr 11, 7:13 AM CDTFlash Flood WarningLSXMonroe6 hr
Apr 11, 7:29 AM CDTFlash Flood WarningLSXFranklin5 hr
Apr 11, 6:00 PM CDTFlash Flood WarningLSXSaint Charles4 hr

Nearby

Flash Flood Warnings in Missouri, 1994Every flash flood warning in 1994

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.