Alert archive / Missouri / Flash Flood Warnings in 1994

Flash Flood Warning 10, NWS St. Louis, MO

April 11, 1994Saint Charles County, Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 11, 1994, 6:00 PM CDT for Saint Charles County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Apr 11, 1994, 6:00 PM CDT (23:00 UTC)
Expired: Apr 11, 1994, 10:00 PM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Whole counties

County Saint Charles County, MO

The radar

The St Louis radar (KLSX), 9 km from the middle of the area, began a volume at 23:00 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 12:00Z, 11.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 513 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 450 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 112306
FFWSTL
MOC183-120300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
600 PM CDT MON APR 11 1994
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...ST CHARLES COUNTY
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD
WARNING FOR ST. CHARLES COUNTY UNTIL 10 PM. AT 600 PM...RADAR INDICATED
A LINE OF THUNDERSTORMS EXTENDING FROM ST. LOUIS WEST
THROUGH ST. CHARLES TO 30 MILES SOUTH OF COLUMBIA.
 
DARDENNE CREEK HAS RISEN SUBSTANTIALLY BETWEEN 5 AND 6 PM. HIGHWAY N IS
CLOSED DUE TO HIGH WATER.
 
 
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.
 
GKS/PEDIGO

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, Apr 11, 12:05 PM CDT, 5 hours 55 minutes before

MOZ053>057-066>069-077>081-088>096-101>105-111905-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1203 PM CDT MON APR 11 1994

...TORNADO WATCH FOR SOUTHWEST MISSOURI UNTIL 700 PM...

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR SOUTHWEST
MISSOURI UNTIL 700 PM THIS EVENING.  THIS WATCH INCLUDES THE CITIES OF
SPRINGFIELD...JOPLIN...BRANSON...NEVADA...AND LEBANON.

CONDITIONS CONTINUE TO BE FAVORABLE FOR THE DEVELOPMENT OF SEVERE
THUNDERSTORMS AND TORNADOES ACROSS SOUTHWESTERN MISSOURI THIS AFTERNOON
AND EVENING. IF YOU LIVE IN THE WATCH AREA...BE PREPARED TO SEEK
SHELTER IF THREATENING WEATHER APPROACHES.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA SOURC&ES FOR FURTHER
STATEMENTS AND/OR WARNINGS.

GLASS

Special weather statement, Apr 11, 4:16 PM CDT, 1 hour 44 minutes before

MOZALL-120215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
410 PM CDT MON APR 11 1994

...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF CENTRAL AND
WEST CENTRAL MISSOURI...

AT 405 PM...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WATCH FOR MUCH OF WEST CENTRAL AND CENTRAL MISSOURI UNTIL
900 PM. THE LARGER CITIES INCLUDED IN THE WATCH ARE
CAMDENTON...JEFFERSON CITY...ROLLA...COLUMBIA AND SEDALIA.

A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITONS ARE FAVORABLE FOR
SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.  SEVERE
THUNDERSTORMS CAN PRODUCE LARGE HAIL AND DAMAGING WINDS...AS WELL AS
VERY HEAVY RAINS AND DEADLY LIGHTNING. PERSONS IN THESE AREAS SHOULD
BE ON THE LOODOUT FOR THREATENING WEATHER CONDITIONS AND LISTERN TO NOAA
WEATHER RADIO OR LOCAL MEDIA SOURCES FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. A TORNADO WATCH CONTINUES IN EFFECT FOR SOUTHWEST MISSOURI
UNTIL 700 PM.
B
GKS

Special weather statement, Apr 11, 5:06 PM CDT, 54 minutes before

MOZ061-063-064-120000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
504 PM CDT MON APR 11 1994

...STRONG THUNDERTORMS MOVING INTO THE ST. LOUIS METRO AREA...

AT 500 PM...WEATHER SERVICE RADAR WAS DETECTING A LINE OF THUNDERSTORMS
WITH HEAVY RAINS EXTENDING FROM UNION NORTHEAST THROUGH ST. CHARLES AND
INTO GREENFIELD ILLINOIS.  THESE STORMS WILL CONTINUE MOVING TO THE
NORTHEAST AT 30 TO 35 MPH THROUGH THE ST. LOUIS AREA.  THESE STORMS WILL
PRODUCE HEAVY DOWNPOURS...DANGEROUS LIGHTNING...PEA SIZE HAIL AND STRONG
GUSTY WINDS.

MOTORISTS SHOULD DRIVE WITH EXTREME CAUTION AS PONDING OF WATER ON ROADS
WILL PRODUCE HAZARDOUS DRIVING CONDITIONS.  CONTINUE TO LISTEN TO NOAA
WEATHER RADIO FOR LATER STATEMENTS.

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 1:18 AM CDT	Flash Flood Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	5 hr
Apr 11, 6:08 AM CDT	Flash Flood Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	6 hr
Apr 11, 6:08 AM CDT	Flash Flood Warning	LSX	Crawford, Washington	6 hr
Apr 11, 6:08 AM CDT	Flash Flood Warning	LSX	Phelps	6 hr
Apr 11, 7:13 AM CDT	Flash Flood Warning	LSX	Pike, Ralls	6 hr
Apr 11, 7:13 AM CDT	Flash Flood Warning	LSX	Monroe	6 hr
Apr 11, 7:29 AM CDT	Flash Flood Warning	LSX	Franklin	5 hr

Nearby

Flash Flood Warnings in Missouri, 1994 Every 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.