Alert archive / Missouri / Flash Flood Warnings in 1996

Flash Flood Warning 20, NWS St. Louis, MO

May 5, 1996Sainte Genevieve County, Missouri; Randolph County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 5, 1996, 2:43 PM CDT for Sainte Genevieve County, Missouri; Randolph County, Illinois. It was in force for 3 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
May 5, 1996, 2:43 PM CDT (19:43 UTC)
Expired
May 5, 1996, 5:45 PM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Randolph County, IL, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 19:43 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, 7.7 hours before the alert went out and 271 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 1996-05-05Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 1996-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 square meters per square second.1939587897Sfc1 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
507 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 051944
FFWSTL
ILC157-MOC186-052245-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
243 PM CDT SUN MAY 5 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  545 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ILLINOIS
 
   ...SOUTHERN RANDOLPH COUNTY
 
 
IN EAST CENTRAL MISSOURI
 
   ...EASTERN ST. GENEVIEVE COUNTY
 
STRONG THUNDERSTORMS HAVE MOVED ACROSS STE. GENEVIEVE COUNTY MISSOURI
AND RANDOLPH COUNTY IN ILLINOIS THIS AFTERNOON. SINCE 130 PM...SOME
AREAS IN EASTERN STE. GENEVIEVE COUNTY AND SOUTHWEST RANDOLPH COUNTY
HAVE RECEIVED 2 TO 3 INCHES OF RAIN. PREVIOUS RAINS HAVE SATURATED THE
GROUND...THEREFORE THIS ADDITIONAL RAINFALL IS EXPECTED TO PRODUCE FLASH
FLOODING.
 
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.
 F
AMS

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, May 5, 1:51 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
145 PM CDT SUN MAY 5 1991

...OLD WARNINGS BEING TRANSMITTED ON WEATHER WIRE...

A GLITCH IN THE NOAA WEATHER WIRE SERVICE HAS APPARENTLY CAUSED
SOME OLD WARNINGS FROM MAY 3 1996 TO BE RE-ISSUED ON THE CIRCUIT.

THERE ARE CURRENTLY NO WEATHER WARNINGS IN EFFECT FOR ANY ILLINOIS
COUNTIES IN THE ST. LOUIS AREA.

WE REGRET ANY CONFUSION THIS MAY HAVE CAUSED.

JPK

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 8:22 AM CDTSevere Thunderstorm WarningLSXMoniteau68 min
May 5, 8:52 AM CDTSevere Thunderstorm WarningLSXCole53 min
May 5, 11:41 AM CDTSevere Thunderstorm WarningLSXCrawford49 min
May 5, 11:59 AM CDTSevere Thunderstorm WarningLSXIron, Washington61 min
May 5, 11:59 AM CDTSevere Thunderstorm WarningLSXReynolds61 min
May 5, 12:39 PM CDTSevere Thunderstorm WarningLSXSaint Francois51 min
May 5, 12:52 PM CDTSevere Thunderstorm WarningLSXMadison38 min
May 5, 2:15 AM CDTSevere Thunderstorm WarningLSXMontgomery45 min
May 5, 2:42 AM CDTSevere Thunderstorm WarningLSXBond48 min
May 5, 3:02 AM CDTSevere Thunderstorm WarningLSXFayette28 min
May 5, 3:29 AM CDTSevere Thunderstorm WarningLSXFayette31 min

Nearby

Flash Flood Warnings in Missouri, 1996Flash Flood Warnings in Illinois, 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.