Alert archive / Missouri / Flash Flood Warnings in 1991

Flash Flood Warning 6, NWS St. Louis, MO

June 4, 1991Adair County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 4, 1991, 1:46 AM CDT for Adair County, Missouri. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jun 4, 1991, 1:46 AM CDT (06:46 UTC)
Expired
Jun 4, 1991, 4:15 AM CDT
In force
2 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Adair County, MO

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 6.8 hours before the alert went out and 292 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 1991-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 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 1991-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
448 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1589 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 040649
FFWSTL
MOC001-040945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
146 AM CDT TUE JUN 4 1991
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  445 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST MISSOURI
 
   ...ADAIR COUNTY
 
AT 145 AM...RADAR INDICATED STRONG THUNDERSTORMS WITH HEAVY RAIN IN THE
VICINITY OF KIRKSVILLE. THESE STORMS WERE MOVING TO THE NORTH NORTHEAST
AT ONLY 15 MPH. ADDITIONAL STORMS WERE DEVELOPING TO THE SOUTH OF ADAIR
COUNTY. MAJOR STREET FLOODING IS EXPECTED IN KIRKSVILLE AS WELL AS FLASH
FLOODING ACROSS THE COUNTY.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
TUCKER

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, Jun 4, 1:31 AM CDT, 15 minutes before
MOZ003-006-040730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
125 AM CDT MON JUN 4 1991

...STRONG THUNDERSTORMS WILL PRODUCE HEAVY RAIN IN THE KIRKSVILL
   AREA...

AT 125 AM...THUNDERSTORMS WERE IN AND AROUND KIRKSVILLE.  THESE
STORMS WERE MOVING NORTHEAST AROUND 15 MPH.  THE STORMS WILL CONTINUE
TO DEVELOP AND MOVE THROUGH KIRKSVILLE AND MUCH OF ADAIR...KNOX...
SCHUYLER AND SCOTLAND COUNTY BETWEEN 130 AND 230 AM.

BRIEF VERY HEAVY RAIN...INTENSE CLOUD TO GROUND LIGHTNING...GUSTY WINDS
AND POSSIBLY SMALL HAIL ARE EXPECTED WITH THESE STORMS.  DRIVERS
SHOULD ANTICIPATE BRIEF PERIODS OF VERY LOW VISIBILITY AND STREET
FLOODING.

TUCKER

Nearby

Flash Flood Warnings in Missouri, 1991Every flash flood warning in 1991

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.