Alert archive / Missouri / Flash Flood Warnings in 1996

Flash Flood Warning 44, NWS St. Louis, MO

August 23, 1996Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this flash flood warning at Aug 23, 1996, 5:45 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 23, 1996, 5:45 PM CDT (22:45 UTC)
Expired
Aug 23, 1996, 7:45 PM CDT
In force
2 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties City of Saint Louis, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 22:46 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

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 224 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, Lincoln, IL at 12:00Z on 1996-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 729 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, Lincoln, IL at 12:00Z on 1996-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939Sfc1 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
729 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
32 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 232248
FFWSTL
MOC189-510-240045-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
545 PM CDT FRI AUG 23 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...ST. LOUIS COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ST. LOUIS CITY
 
AT 540 PM...NWS DOPPLER RADAR SHOWED NEARLY CONTINUOUS THUNDERSTORMS
FROM DOWNTOWN ST LOUIS THROUGH CLAYTON...BALLWIN...AND CHESTERFIELD TO
NEAR WELDON SPRING. THESE STORMS WERE PRODUCING VERY HEAVY RAIN AS THEY
MOVED SLOWLY EAST AROUND 15 MPH.
 
RADAR ESTIMATES AND SPOTTER REPORTS INDICATED SOME AREAS HAVE RECEIVED
1.5 TO 2 INCHES OF RAIN SINCE 500 PM.  THE CURRENT MOVEMENT OF THESE
STORMS WILL ALLOW SOME AREAS TO SEE REPEATEDLY HEAVY RAIN THROUGH 700
PM.  AN ADDITIONAL 2 INCHES OF RAIN IS POSSIBLE IN SOME LOCATIONS ACROSS
THE ST LOUIS METRO AREA BEFORE THE STORMS END.  THIS COULD RESULT IN
FLOODING OF LOW-LYING AREAS AND ROADWAYS AND SOME CREEKS OR STREAMS.
 
IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO
HIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE
ROAD...ESPECIALLY LOW-WATER BRIDGES.
 
GLASS

Nearby

Flash Flood Warnings in Missouri, 1996Every flash flood warning in 1996

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.